KeyedCollection<TKey,TItem> 클래스

정의

키가 값에 포함된 컬렉션에 대한 기본 추상 클래스를 제공합니다.Provides the abstract base class for a collection whose keys are embedded in the values.

generic <typename TKey, typename TItem>
public ref class KeyedCollection abstract : System::Collections::ObjectModel::Collection<TItem>
public abstract class KeyedCollection<TKey,TItem> : System.Collections.ObjectModel.Collection<TItem>
[System.Runtime.InteropServices.ComVisible(false)]
[System.Serializable]
public abstract class KeyedCollection<TKey,TItem> : System.Collections.ObjectModel.Collection<TItem>
type KeyedCollection<'Key, 'Item> = class
    inherit Collection<'Item>
Public MustInherit Class KeyedCollection(Of TKey, TItem)
Inherits Collection(Of TItem)

형식 매개 변수

TKey

컬렉션에 있는 키의 형식입니다.The type of keys in the collection.

TItem

컬렉션에 있는 항목의 형식입니다.The type of items in the collection.

상속
KeyedCollection<TKey,TItem>
파생
특성

예제

이 섹션에는 두 코드 예제가 있습니다.This section contains two code examples. 첫 번째 예제에서는 KeyedCollection<TKey,TItem>에서 파생 하는 데 필요한 최소한의 코드를 보여 주고 상속 된 여러 메서드를 보여 줍니다.The first example shows the minimum code required to derive from KeyedCollection<TKey,TItem>, and demonstrates many of the inherited methods. 두 번째 예제에서는 KeyedCollection<TKey,TItem>의 보호 된 메서드를 재정의 하 여 사용자 지정 동작을 제공 하는 방법을 보여 줍니다.The second example shows how to override the protected methods of KeyedCollection<TKey,TItem> to provide custom behavior.

예 1Example 1

이 코드 예제에서는 KeyedCollection<TKey,TItem>에서 컬렉션 클래스를 파생 시키는 데 필요한 최소한의 코드를 보여 줍니다. GetKeyForItem 메서드를 재정의 하 고 기본 클래스 생성자에 위임 하는 public 생성자를 제공 합니다.This code example shows the minimum code necessary to derive a collection class from KeyedCollection<TKey,TItem>: overriding the GetKeyForItem method and providing a public constructor that delegates to a base class constructor. 또한 코드 예제에서는 KeyedCollection<TKey,TItem>Collection<T> 클래스에서 상속 된 많은 속성 및 메서드를 보여 줍니다.The code example also demonstrates many of the properties and methods inherited from KeyedCollection<TKey,TItem> and Collection<T> classes.

SimpleOrder 클래스는 각각 주문의 품목을 나타내는 OrderItem 개체를 포함 하는 매우 간단한 청구 목록입니다.The SimpleOrder class is a very simple requisition list that contains OrderItem objects, each of which represents a line item in the order. KeyedCollection<TKey,TItem>에서 파생 되는 클래스에 대 한 중요 한 고려 사항인 OrderItem의 키를 변경할 수 없습니다.The key of OrderItem is immutable, an important consideration for classes that derive from KeyedCollection<TKey,TItem>. 변경 가능한 키를 사용 하는 코드 예제는 ChangeItemKey를 참조 하세요.For a code example that uses mutable keys, see ChangeItemKey.

using namespace System;
using namespace System::Collections::Generic;
using namespace System::Collections::ObjectModel;

// This class represents a simple line item in an order. All the 
// values are immutable except quantity.
// 
public ref class OrderItem
{
private:
    int _quantity;
    
public:
    initonly int PartNumber;
    initonly String^ Description;
    initonly double UnitPrice;
    
    OrderItem(int partNumber, String^ description, 
        int quantity, double unitPrice)
    {
        this->PartNumber = partNumber;
        this->Description = description;
        this->Quantity = quantity;
        this->UnitPrice = unitPrice;
    } 
    
    property int Quantity    
    {
        int get() { return _quantity; }
        void set(int value)
        {
            if (value < 0)
                throw gcnew ArgumentException("Quantity cannot be negative.");
            
            _quantity = value;
        }
    }
        
    virtual String^ ToString() override 
    {
        return String::Format(
            "{0,9} {1,6} {2,-12} at {3,8:#,###.00} = {4,10:###,###.00}", 
            PartNumber, _quantity, Description, UnitPrice, 
            UnitPrice * _quantity);
    }
};

// This class represents a very simple keyed list of OrderItems,
// inheriting most of its behavior from the KeyedCollection and 
// Collection classes. The immediate base class is the constructed
// type KeyedCollection<int, OrderItem>. When you inherit
// from KeyedCollection, the second generic type argument is the 
// type that you want to store in the collection -- in this case
// OrderItem. The first type argument is the type that you want
// to use as a key. Its values must be calculated from OrderItem; 
// in this case it is the int field PartNumber, so SimpleOrder
// inherits KeyedCollection<int, OrderItem>.
//
public ref class SimpleOrder : KeyedCollection<int, OrderItem^>
{
    // The parameterless constructor of the base class creates a 
    // KeyedCollection with an internal dictionary. For this code 
    // example, no other constructors are exposed.
    //
public:
    SimpleOrder() {}
    
    // This is the only method that absolutely must be overridden,
    // because without it the KeyedCollection cannot extract the
    // keys from the items. The input parameter type is the 
    // second generic type argument, in this case OrderItem, and 
    // the return value type is the first generic type argument,
    // in this case int.
    //
protected:
    virtual int GetKeyForItem(OrderItem^ item) override 
    {
        // In this example, the key is the part number.
        return item->PartNumber;
    }
};

public ref class Demo
{    
public:
    static void Main()
    {
        SimpleOrder^ weekly = gcnew SimpleOrder();

        // The Add method, inherited from Collection, takes OrderItem.
        //
        weekly->Add(gcnew OrderItem(110072674, "Widget", 400, 45.17));
        weekly->Add(gcnew OrderItem(110072675, "Sprocket", 27, 5.3));
        weekly->Add(gcnew OrderItem(101030411, "Motor", 10, 237.5));
        weekly->Add(gcnew OrderItem(110072684, "Gear", 175, 5.17));
        
        Display(weekly);
    
        // The Contains method of KeyedCollection takes the key, 
        // type, in this case int.
        //
        Console::WriteLine("\nContains(101030411): {0}", 
            weekly->Contains(101030411));

        // The default Item property of KeyedCollection takes a key.
        //
        Console::WriteLine("\nweekly(101030411)->Description: {0}", 
            weekly[101030411]->Description);

        // The Remove method of KeyedCollection takes a key.
        //
        Console::WriteLine("\nRemove(101030411)");
        weekly->Remove(101030411);
        Display(weekly);

        // The Insert method, inherited from Collection, takes an 
        // index and an OrderItem.
        //
        Console::WriteLine("\nInsert(2, New OrderItem(...))");
        weekly->Insert(2, gcnew OrderItem(111033401, "Nut", 10, .5));
        Display(weekly);

        // The default Item property is overloaded. One overload comes
        // from KeyedCollection<int, OrderItem>; that overload
        // is read-only, and takes Integer because it retrieves by key. 
        // The other overload comes from Collection<OrderItem>, the 
        // base class of KeyedCollection<int, OrderItem>; it 
        // retrieves by index, so it also takes an Integer. The compiler
        // uses the most-derived overload, from KeyedCollection, so the
        // only way to access SimpleOrder by index is to cast it to
        // Collection<OrderItem>. Otherwise the index is interpreted
        // as a key, and KeyNotFoundException is thrown.
        //
        Collection<OrderItem^>^ coweekly = weekly;
        Console::WriteLine("\ncoweekly[2].Description: {0}", 
            coweekly[2]->Description);
 
        Console::WriteLine("\ncoweekly[2] = gcnew OrderItem(...)");
        coweekly[2] = gcnew OrderItem(127700026, "Crank", 27, 5.98);

        OrderItem^ temp = coweekly[2];

        // The IndexOf method inherited from Collection<OrderItem> 
        // takes an OrderItem instead of a key
        // 
        Console::WriteLine("\nIndexOf(temp): {0}", weekly->IndexOf(temp));

        // The inherited Remove method also takes an OrderItem.
        //
        Console::WriteLine("\nRemove(temp)");
        weekly->Remove(temp);
        Display(weekly);

        Console::WriteLine("\nRemoveAt(0)");
        weekly->RemoveAt(0);
        Display(weekly);

    }
    
private:
    static void Display(SimpleOrder^ order)
    {
        Console::WriteLine();
        for each( OrderItem^ item in order )
        {
            Console::WriteLine(item);
        }
    }
};

void main()
{
    Demo::Main();
}

/* This code example produces the following output:

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
101030411     10 Motor        at   237.50 =   2,375.00
110072684    175 Gear         at     5.17 =     904.75

Contains(101030411): True

weekly(101030411)->Description: Motor

Remove(101030411)

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
110072684    175 Gear         at     5.17 =     904.75

Insert(2, New OrderItem(...))

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
111033401     10 Nut          at      .50 =       5.00
110072684    175 Gear         at     5.17 =     904.75

coweekly(2)->Description: Nut

coweekly[2] = gcnew OrderItem(...)

IndexOf(temp): 2

Remove(temp)

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
110072684    175 Gear         at     5.17 =     904.75

RemoveAt(0)

110072675     27 Sprocket     at     5.30 =     143.10
110072684    175 Gear         at     5.17 =     904.75
 */
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

// This class represents a very simple keyed list of OrderItems,
// inheriting most of its behavior from the KeyedCollection and 
// Collection classes. The immediate base class is the constructed
// type KeyedCollection<int, OrderItem>. When you inherit
// from KeyedCollection, the second generic type argument is the 
// type that you want to store in the collection -- in this case
// OrderItem. The first type argument is the type that you want
// to use as a key. Its values must be calculated from OrderItem; 
// in this case it is the int field PartNumber, so SimpleOrder
// inherits KeyedCollection<int, OrderItem>.
//
public class SimpleOrder : KeyedCollection<int, OrderItem>
{
       
    // This is the only method that absolutely must be overridden,
    // because without it the KeyedCollection cannot extract the
    // keys from the items. The input parameter type is the 
    // second generic type argument, in this case OrderItem, and 
    // the return value type is the first generic type argument,
    // in this case int.
    //
    protected override int GetKeyForItem(OrderItem item)
    {
        // In this example, the key is the part number.
        return item.PartNumber;
    }
}

public class Demo
{    
    public static void Main()
    {
        SimpleOrder weekly = new SimpleOrder();

        // The Add method, inherited from Collection, takes OrderItem.
        //
        weekly.Add(new OrderItem(110072674, "Widget", 400, 45.17));
        weekly.Add(new OrderItem(110072675, "Sprocket", 27, 5.3));
        weekly.Add(new OrderItem(101030411, "Motor", 10, 237.5));
        weekly.Add(new OrderItem(110072684, "Gear", 175, 5.17));
        
        Display(weekly);
    
        // The Contains method of KeyedCollection takes the key, 
        // type, in this case int.
        //
        Console.WriteLine("\nContains(101030411): {0}", 
            weekly.Contains(101030411));

        // The default Item property of KeyedCollection takes a key.
        //
        Console.WriteLine("\nweekly[101030411].Description: {0}", 
            weekly[101030411].Description);

        // The Remove method of KeyedCollection takes a key.
        //
        Console.WriteLine("\nRemove(101030411)");
        weekly.Remove(101030411);
        Display(weekly);

        // The Insert method, inherited from Collection, takes an 
        // index and an OrderItem.
        //
        Console.WriteLine("\nInsert(2, New OrderItem(...))");
        weekly.Insert(2, new OrderItem(111033401, "Nut", 10, .5));
        Display(weekly);

        // The default Item property is overloaded. One overload comes
        // from KeyedCollection<int, OrderItem>; that overload
        // is read-only, and takes Integer because it retrieves by key. 
        // The other overload comes from Collection<OrderItem>, the 
        // base class of KeyedCollection<int, OrderItem>; it 
        // retrieves by index, so it also takes an Integer. The compiler
        // uses the most-derived overload, from KeyedCollection, so the
        // only way to access SimpleOrder by index is to cast it to
        // Collection<OrderItem>. Otherwise the index is interpreted
        // as a key, and KeyNotFoundException is thrown.
        //
        Collection<OrderItem> coweekly = weekly;
        Console.WriteLine("\ncoweekly[2].Description: {0}", 
            coweekly[2].Description);
 
        Console.WriteLine("\ncoweekly[2] = new OrderItem(...)");
        coweekly[2] = new OrderItem(127700026, "Crank", 27, 5.98);

        OrderItem temp = coweekly[2];

        // The IndexOf method inherited from Collection<OrderItem> 
        // takes an OrderItem instead of a key
        // 
        Console.WriteLine("\nIndexOf(temp): {0}", weekly.IndexOf(temp));

        // The inherited Remove method also takes an OrderItem.
        //
        Console.WriteLine("\nRemove(temp)");
        weekly.Remove(temp);
        Display(weekly);

        Console.WriteLine("\nRemoveAt(0)");
        weekly.RemoveAt(0);
        Display(weekly);
    }
    
    private static void Display(SimpleOrder order)
    {
        Console.WriteLine();
        foreach( OrderItem item in order )
        {
            Console.WriteLine(item);
        }
    }
}

// This class represents a simple line item in an order. All the 
// values are immutable except quantity.
// 
public class OrderItem
{
    public readonly int PartNumber;
    public readonly string Description;
    public readonly double UnitPrice;
    
    private int _quantity = 0;
    
    public OrderItem(int partNumber, string description, 
        int quantity, double unitPrice)
    {
        this.PartNumber = partNumber;
        this.Description = description;
        this.Quantity = quantity;
        this.UnitPrice = unitPrice;
    } 
    
    public int Quantity    
    {
        get { return _quantity; }
        set
        {
            if (value<0)
                throw new ArgumentException("Quantity cannot be negative.");
            
            _quantity = value;
        }
    }
        
    public override string ToString()
    {
        return String.Format(
            "{0,9} {1,6} {2,-12} at {3,8:#,###.00} = {4,10:###,###.00}", 
            PartNumber, _quantity, Description, UnitPrice, 
            UnitPrice * _quantity);
    }
}

/* This code example produces the following output:

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
101030411     10 Motor        at   237.50 =   2,375.00
110072684    175 Gear         at     5.17 =     904.75

Contains(101030411): True

weekly[101030411].Description: Motor

Remove(101030411)

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
110072684    175 Gear         at     5.17 =     904.75

Insert(2, New OrderItem(...))

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
111033401     10 Nut          at      .50 =       5.00
110072684    175 Gear         at     5.17 =     904.75

coweekly[2].Description: Nut

coweekly[2] = new OrderItem(...)

IndexOf(temp): 2

Remove(temp)

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
110072684    175 Gear         at     5.17 =     904.75

RemoveAt(0)

110072675     27 Sprocket     at     5.30 =     143.10
110072684    175 Gear         at     5.17 =     904.75
 */
Imports System.Collections.Generic
Imports System.Collections.ObjectModel

' This class represents a very simple keyed list of OrderItems,
' inheriting most of its behavior from the KeyedCollection and 
' Collection classes. The immediate base class is the constructed
' type KeyedCollection(Of Integer, OrderItem). When you inherit
' from KeyedCollection, the second generic type argument is the 
' type that you want to store in the collection -- in this case
' OrderItem. The first generic argument is the type that you want
' to use as a key. Its values must be calculated from OrderItem; 
' in this case it is the Integer field PartNumber, so SimpleOrder
' inherits KeyedCollection(Of Integer, OrderItem).
'
Public Class SimpleOrder
    Inherits KeyedCollection(Of Integer, OrderItem)


    ' This is the only method that absolutely must be overridden,
    ' because without it the KeyedCollection cannot extract the
    ' keys from the items. The input parameter type is the 
    ' second generic type argument, in this case OrderItem, and 
    ' the return value type is the first generic type argument,
    ' in this case Integer.
    '
    Protected Overrides Function GetKeyForItem( _
        ByVal item As OrderItem) As Integer

        ' In this example, the key is the part number.
        Return item.PartNumber   
    End Function

End Class

Public Class Demo
    
    Public Shared Sub Main() 
        Dim weekly As New SimpleOrder()

        ' The Add method, inherited from Collection, takes OrderItem.
        '
        weekly.Add(New OrderItem(110072674, "Widget", 400, 45.17))
        weekly.Add(New OrderItem(110072675, "Sprocket", 27, 5.3))
        weekly.Add(New OrderItem(101030411, "Motor", 10, 237.5))
        weekly.Add(New OrderItem(110072684, "Gear", 175, 5.17))
        
        Display(weekly)
    
        ' The Contains method of KeyedCollection takes TKey.
        '
        Console.WriteLine(vbLf & "Contains(101030411): {0}", _
            weekly.Contains(101030411))

        ' The default Item property of KeyedCollection takes the key
        ' type, Integer.
        '
        Console.WriteLine(vbLf & "weekly(101030411).Description: {0}", _
            weekly(101030411).Description)

        ' The Remove method of KeyedCollection takes a key.
        '
        Console.WriteLine(vbLf & "Remove(101030411)")
        weekly.Remove(101030411)
        Display(weekly)

        ' The Insert method, inherited from Collection, takes an 
        ' index and an OrderItem.
        '
        Console.WriteLine(vbLf & "Insert(2, New OrderItem(...))")
        weekly.Insert(2, New OrderItem(111033401, "Nut", 10, .5))
        Display(weekly)

        ' The default Item property is overloaded. One overload comes
        ' from KeyedCollection(Of Integer, OrderItem); that overload
        ' is read-only, and takes Integer because it retrieves by key. 
        ' The other overload comes from Collection(Of OrderItem), the 
        ' base class of KeyedCollection(Of Integer, OrderItem); it 
        ' retrieves by index, so it also takes an Integer. The compiler
        ' uses the most-derived overload, from KeyedCollection, so the
        ' only way to access SimpleOrder by index is to cast it to
        ' Collection(Of OrderItem). Otherwise the index is interpreted
        ' as a key, and KeyNotFoundException is thrown.
        '
        Dim coweekly As Collection(Of OrderItem) = weekly
        Console.WriteLine(vbLf & "coweekly(2).Description: {0}", _
            coweekly(2).Description)
 
        Console.WriteLine(vbLf & "coweekly(2) = New OrderItem(...)")
        coweekly(2) = New OrderItem(127700026, "Crank", 27, 5.98)

        Dim temp As OrderItem = coweekly(2)

        ' The IndexOf method, inherited from Collection(Of OrderItem), 
        ' takes an OrderItem instead of a key.
        ' 
        Console.WriteLine(vbLf & "IndexOf(temp): {0}", _
            weekly.IndexOf(temp))

        ' The inherited Remove method also takes an OrderItem.
        '
        Console.WriteLine(vbLf & "Remove(temp)")
        weekly.Remove(temp)
        Display(weekly)

        Console.WriteLine(vbLf & "RemoveAt(0)")
        weekly.RemoveAt(0)
        Display(weekly)

    End Sub
    
    Private Shared Sub Display(ByVal order As SimpleOrder) 
        Console.WriteLine()
        For Each item As OrderItem In  order
            Console.WriteLine(item)
        Next item
    End Sub
End Class

' This class represents a simple line item in an order. All the 
' values are immutable except quantity.
' 
Public Class OrderItem
    Public ReadOnly PartNumber As Integer
    Public ReadOnly Description As String
    Public ReadOnly UnitPrice As Double
    
    Private _quantity As Integer = 0
    
    Public Sub New(ByVal partNumber As Integer, _
                   ByVal description As String, _
                   ByVal quantity As Integer, _
                   ByVal unitPrice As Double) 
        Me.PartNumber = partNumber
        Me.Description = description
        Me.Quantity = quantity
        Me.UnitPrice = unitPrice
    End Sub
    
    Public Property Quantity() As Integer 
        Get
            Return _quantity
        End Get
        Set
            If value < 0 Then
                Throw New ArgumentException("Quantity cannot be negative.")
            End If
            _quantity = value
        End Set
    End Property
        
    Public Overrides Function ToString() As String 
        Return String.Format( _
            "{0,9} {1,6} {2,-12} at {3,8:#,###.00} = {4,10:###,###.00}", _
            PartNumber, _quantity, Description, UnitPrice, _
            UnitPrice * _quantity)
    End Function
End Class

' This code example produces the following output:
'
'110072674    400 Widget       at    45.17 =  18,068.00
'110072675     27 Sprocket     at     5.30 =     143.10
'101030411     10 Motor        at   237.50 =   2,375.00
'110072684    175 Gear         at     5.17 =     904.75
'
'Contains(101030411): True
'
'weekly(101030411).Description: Motor
'
'Remove(101030411)
'
'110072674    400 Widget       at    45.17 =  18,068.00
'110072675     27 Sprocket     at     5.30 =     143.10
'110072684    175 Gear         at     5.17 =     904.75
'
'Insert(2, New OrderItem(...))
'
'110072674    400 Widget       at    45.17 =  18,068.00
'110072675     27 Sprocket     at     5.30 =     143.10
'111033401     10 Nut          at      .50 =       5.00
'110072684    175 Gear         at     5.17 =     904.75
'
'coweekly(2).Description: Nut
'
'coweekly(2) = New OrderItem(...)
'
'IndexOf(temp): 2
'
'Remove(temp)
'
'110072674    400 Widget       at    45.17 =  18,068.00
'110072675     27 Sprocket     at     5.30 =     143.10
'110072684    175 Gear         at     5.17 =     904.75
'
'RemoveAt(0)
'
'110072675     27 Sprocket     at     5.30 =     143.10
'110072684    175 Gear         at     5.17 =     904.75

예 2Example 2

다음 코드 예제에서는 보호 된 InsertItem, RemoveItem, ClearItemsSetItem 메서드를 재정의 하 고, Add, RemoveClear 메서드에 사용자 지정 동작을 제공 하 고, 기본 Item[Int32] 속성 (의 C#인덱서)을 설정 하는 방법을 보여 줍니다.The following code example shows how to override the protected InsertItem, RemoveItem, ClearItems, and SetItem methods, to provide custom behavior for the Add, Remove, and Clear methods, and for setting the default Item[Int32] property (the indexer in C#). 이 예제에서 제공 되는 사용자 지정 동작은 재정의 된 각 메서드의 끝에서 발생 하는 Changed라는 알림 이벤트입니다.The custom behavior provided in this example is a notification event named Changed, which is raised at the end of each of the overridden methods.

코드 예제에서는 KeyedCollection<TKey,TItem>에서 파생 되 고 간단한 주문 폼을 나타내는 SimpleOrder 클래스를 만듭니다.The code example creates the SimpleOrder class, which derives from KeyedCollection<TKey,TItem> and represents a simple order form. 주문 폼에는 정렬 된 항목을 나타내는 OrderItem 개체가 포함 되어 있습니다.The order form contains OrderItem objects representing items ordered. 또한 코드 예제에서는 이벤트 정보를 포함 하는 SimpleOrderChangedEventArgs 클래스와 변경 유형을 식별 하는 열거형을 만듭니다.The code example also creates a SimpleOrderChangedEventArgs class to contain the event information, and an enumeration to identify the type of change.

이 코드 예제에서는 Demo 클래스의 Main 메서드에서 파생 클래스의 속성 및 메서드를 호출 하 여 사용자 지정 동작을 보여 줍니다.The code example demonstrates the custom behavior by calling the properties and methods of the derived class, in the Main method of the Demo class.

이 코드 예제에서는 변경할 수 없는 키를 사용 하 여 개체를 사용 합니다.This code example uses objects with immutable keys. 변경 가능한 키를 사용 하는 코드 예제는 ChangeItemKey를 참조 하세요.For a code example that uses mutable keys, see ChangeItemKey.

using namespace System;
using namespace System::Collections::Generic;
using namespace System::Collections::ObjectModel;

public enum class ChangeTypes
{
    Added,
    Removed, 
    Replaced, 
    Cleared
};

ref class SimpleOrderChangedEventArgs; 

// This class represents a simple line item in an order. All the 
// values are immutable except quantity.
// 
public ref class OrderItem
{
private:
    int _quantity;

public:
    initonly int PartNumber;
    initonly String^ Description;
    initonly double UnitPrice;
        
    OrderItem(int partNumber, String^ description, int quantity, 
        double unitPrice)
    {
        this->PartNumber = partNumber;
        this->Description = description;
        this->Quantity = quantity;
        this->UnitPrice = unitPrice;
    };
    
    property int Quantity    
    {
        int get() { return _quantity; };
        void set(int value)
        {
            if (value < 0)
                throw gcnew ArgumentException("Quantity cannot be negative.");
            
            _quantity = value;
        };
    };
        
    virtual String^ ToString() override 
    {
        return String::Format(
            "{0,9} {1,6} {2,-12} at {3,8:#,###.00} = {4,10:###,###.00}", 
            PartNumber, _quantity, Description, UnitPrice, 
            UnitPrice * _quantity);
    };
};

// Event argument for the Changed event.
//
public ref class SimpleOrderChangedEventArgs : EventArgs
{
public:
    OrderItem^ ChangedItem;
    initonly ChangeTypes ChangeType;
    OrderItem^ ReplacedWith;

    SimpleOrderChangedEventArgs(ChangeTypes change, 
        OrderItem^ item, OrderItem^ replacement)
    {
        this->ChangeType = change;
        this->ChangedItem = item;
        this->ReplacedWith = replacement;
    }
};

// This class derives from KeyedCollection and shows how to override
// the protected ClearItems, InsertItem, RemoveItem, and SetItem 
// methods in order to change the behavior of the default Item 
// property and the Add, Clear, Insert, and Remove methods. The
// class implements a Changed event, which is raised by all the
// protected methods.
//
// SimpleOrder is a collection of OrderItem objects, and its key
// is the PartNumber field of OrderItem-> PartNumber is an Integer,
// so SimpleOrder inherits KeyedCollection<int, OrderItem>.
// (Note that the key of OrderItem cannot be changed; if it could 
// be changed, SimpleOrder would have to override ChangeItemKey.)
//
public ref class SimpleOrder : KeyedCollection<int, OrderItem^>
{
public:
    event EventHandler<SimpleOrderChangedEventArgs^>^ Changed;

    // This parameterless constructor calls the base class constructor
    // that specifies a dictionary threshold of 0, so that the internal
    // dictionary is created as soon as an item is added to the 
    // collection.
    //
    SimpleOrder() : KeyedCollection<int, OrderItem^>(nullptr, 0) {};
    
    // This is the only method that absolutely must be overridden,
    // because without it the KeyedCollection cannot extract the
    // keys from the items. 
    //
protected:
    virtual int GetKeyForItem(OrderItem^ item) override
    {
        // In this example, the key is the part number.
        return item->PartNumber;
    }

    virtual void InsertItem(int index, OrderItem^ newItem) override 
    {
        __super::InsertItem(index, newItem);

        Changed(this, gcnew SimpleOrderChangedEventArgs(
            ChangeTypes::Added, newItem, nullptr));
    }

    virtual void SetItem(int index, OrderItem^ newItem) override 
    {
        OrderItem^ replaced = this->Items[index];
        __super::SetItem(index, newItem);

        Changed(this, gcnew SimpleOrderChangedEventArgs(
            ChangeTypes::Replaced, replaced, newItem));
    }

    virtual void RemoveItem(int index) override 
    {
        OrderItem^ removedItem = Items[index];
        __super::RemoveItem(index);

        Changed(this, gcnew SimpleOrderChangedEventArgs(
            ChangeTypes::Removed, removedItem, nullptr));
    }

    virtual void ClearItems() override 
    {
        __super::ClearItems();

        Changed(this, gcnew SimpleOrderChangedEventArgs(
            ChangeTypes::Cleared, nullptr, nullptr));
    }

    // This method uses the internal reference to the dictionary
    // to test fo
public:
    void AddOrMerge(OrderItem^ newItem)
    {

        int key = this->GetKeyForItem(newItem);
        OrderItem^ existingItem = nullptr;

        // The dictionary is not created until the first item is 
        // added, so it is necessary to test for null. Using 
        // AndAlso ensures that TryGetValue is not called if the
        // dictionary does not exist.
        //
        if (this->Dictionary != nullptr && 
            this->Dictionary->TryGetValue(key, existingItem))
        {
            existingItem->Quantity += newItem->Quantity;
        }
        else
        {
            this->Add(newItem);
        }
    }
};

public ref class Demo
{    
public:
    static void Main()
    {
        SimpleOrder^ weekly = gcnew SimpleOrder();
        weekly->Changed += gcnew 
            EventHandler<SimpleOrderChangedEventArgs^>(ChangedHandler);

        // The Add method, inherited from Collection, takes OrderItem->
        //
        weekly->Add(gcnew OrderItem(110072674, "Widget", 400, 45.17));
        weekly->Add(gcnew OrderItem(110072675, "Sprocket", 27, 5.3));
        weekly->Add(gcnew OrderItem(101030411, "Motor", 10, 237.5));
        weekly->Add(gcnew OrderItem(110072684, "Gear", 175, 5.17));

        Display(weekly);
        
        // The Contains method of KeyedCollection takes TKey.
        //
        Console::WriteLine("\nContains(101030411): {0}", 
            weekly->Contains(101030411));

        // The default Item property of KeyedCollection takes the key
        // type, Integer. The property is read-only.
        //
        Console::WriteLine("\nweekly[101030411]->Description: {0}", 
            weekly[101030411]->Description);

        // The Remove method of KeyedCollection takes a key.
        //
        Console::WriteLine("\nRemove(101030411)");
        weekly->Remove(101030411);

        // The Insert method, inherited from Collection, takes an 
        // index and an OrderItem.
        //
        Console::WriteLine("\nInsert(2, gcnew OrderItem(...))");
        weekly->Insert(2, gcnew OrderItem(111033401, "Nut", 10, .5));
         
        // The default Item property is overloaded. One overload comes
        // from KeyedCollection<int, OrderItem>; that overload
        // is read-only, and takes Integer because it retrieves by key. 
        // The other overload comes from Collection<OrderItem>, the 
        // base class of KeyedCollection<int, OrderItem>; it 
        // retrieves by index, so it also takes an Integer. The compiler
        // uses the most-derived overload, from KeyedCollection, so the
        // only way to access SimpleOrder by index is to cast it to
        // Collection<OrderItem>. Otherwise the index is interpreted
        // as a key, and KeyNotFoundException is thrown.
        //
        Collection<OrderItem^>^ coweekly = weekly;
        Console::WriteLine("\ncoweekly[2].Description: {0}", 
            coweekly[2]->Description);
 
        Console::WriteLine("\ncoweekly[2] = gcnew OrderItem(...)");
        coweekly[2] = gcnew OrderItem(127700026, "Crank", 27, 5.98);

        OrderItem^ temp = coweekly[2];

        // The IndexOf method, inherited from Collection<OrderItem>, 
        // takes an OrderItem instead of a key.
        // 
        Console::WriteLine("\nIndexOf(temp): {0}", weekly->IndexOf(temp));

        // The inherited Remove method also takes an OrderItem->
        //
        Console::WriteLine("\nRemove(temp)");
        weekly->Remove(temp);

        Console::WriteLine("\nRemoveAt(0)");
        weekly->RemoveAt(0);

        weekly->AddOrMerge(gcnew OrderItem(110072684, "Gear", 1000, 5.17));

        Display(weekly);

        Console::WriteLine();
        weekly->Clear();
    }
    
private:
    static void Display(SimpleOrder^ order)
    {
        Console::WriteLine();
        for each( OrderItem^ item in order )
        {
            Console::WriteLine(item);
        }
    }

    static void ChangedHandler(Object^ source, 
        SimpleOrderChangedEventArgs^ e)
    {
        OrderItem^ item = e->ChangedItem;

        if (e->ChangeType == ChangeTypes::Replaced)
        {
            OrderItem^ replacement = e->ReplacedWith;

            Console::WriteLine("{0} (quantity {1}) was replaced " +
                "by {2}, (quantity {3}).", item->Description, 
                item->Quantity, replacement->Description, 
                replacement->Quantity);
        }
        else if(e->ChangeType == ChangeTypes::Cleared)
        {
            Console::WriteLine("The order list was cleared.");
        }
        else
        {
            Console::WriteLine("{0} (quantity {1}) was {2}.", 
                item->Description, item->Quantity, e->ChangeType);
        }
    }
};

void main()
{
    Demo::Main();
}

/* This code example produces the following output:

Widget (quantity 400) was Added.
Sprocket (quantity 27) was Added.
Motor (quantity 10) was Added.
Gear (quantity 175) was Added.

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
101030411     10 Motor        at   237.50 =   2,375.00
110072684    175 Gear         at     5.17 =     904.75

Contains(101030411): True

weekly[101030411]->Description: Motor

Remove(101030411)
Motor (quantity 10) was Removed.

Insert(2, gcnew OrderItem(...))
Nut (quantity 10) was Added.

coweekly[2].Description: Nut

coweekly[2] = gcnew OrderItem(...)
Nut (quantity 10) was replaced by Crank, (quantity 27).

IndexOf(temp): 2

Remove(temp)
Crank (quantity 27) was Removed.

RemoveAt(0)
Widget (quantity 400) was Removed.

110072675     27 Sprocket     at     5.30 =     143.10
110072684   1175 Gear         at     5.17 =   6,074.75

The order list was cleared.
 */
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;

// This class derives from KeyedCollection and shows how to override
// the protected ClearItems, InsertItem, RemoveItem, and SetItem 
// methods in order to change the behavior of the default Item 
// property and the Add, Clear, Insert, and Remove methods. The
// class implements a Changed event, which is raised by all the
// protected methods.
//
// SimpleOrder is a collection of OrderItem objects, and its key
// is the PartNumber field of OrderItem. PartNumber is an Integer,
// so SimpleOrder inherits KeyedCollection<int, OrderItem>.
// (Note that the key of OrderItem cannot be changed; if it could 
// be changed, SimpleOrder would have to override ChangeItemKey.)
//
public class SimpleOrder : KeyedCollection<int, OrderItem>
{
    public event EventHandler<SimpleOrderChangedEventArgs> Changed;

    // This parameterless constructor calls the base class constructor
    // that specifies a dictionary threshold of 0, so that the internal
    // dictionary is created as soon as an item is added to the 
    // collection.
    //
    public SimpleOrder() : base(null, 0) {}
    
    // This is the only method that absolutely must be overridden,
    // because without it the KeyedCollection cannot extract the
    // keys from the items. 
    //
    protected override int GetKeyForItem(OrderItem item)
    {
        // In this example, the key is the part number.
        return item.PartNumber;
    }

    protected override void InsertItem(int index, OrderItem newItem)
    {
        base.InsertItem(index, newItem);

        EventHandler<SimpleOrderChangedEventArgs> temp = Changed;
        if (temp != null)
        {
            temp(this, new SimpleOrderChangedEventArgs(
                ChangeType.Added, newItem, null));
        }
    }

    protected override void SetItem(int index, OrderItem newItem)
    {
        OrderItem replaced = Items[index];
        base.SetItem(index, newItem);

        EventHandler<SimpleOrderChangedEventArgs> temp = Changed;
        if (temp != null)
        {
            temp(this, new SimpleOrderChangedEventArgs(
                ChangeType.Replaced, replaced, newItem));
        }
    }

    protected override void RemoveItem(int index)
    {
        OrderItem removedItem = Items[index];
        base.RemoveItem(index);

        EventHandler<SimpleOrderChangedEventArgs> temp = Changed;
        if (temp != null)
        {
            temp(this, new SimpleOrderChangedEventArgs(
                ChangeType.Removed, removedItem, null));
        }
    }

    protected override void ClearItems()
    {
        base.ClearItems();

        EventHandler<SimpleOrderChangedEventArgs> temp = Changed;
        if (temp != null)
        {
            temp(this, new SimpleOrderChangedEventArgs(
                ChangeType.Cleared, null, null));
        }
    }
}

// Event argument for the Changed event.
//
public class SimpleOrderChangedEventArgs : EventArgs
{
    private OrderItem _changedItem;
    private ChangeType _changeType;
    private OrderItem _replacedWith;

    public OrderItem ChangedItem { get { return _changedItem; }}
    public ChangeType ChangeType { get { return _changeType; }}
    public OrderItem ReplacedWith { get { return _replacedWith; }}

    public SimpleOrderChangedEventArgs(ChangeType change, 
        OrderItem item, OrderItem replacement)
    {
        _changeType = change;
        _changedItem = item;
        _replacedWith = replacement;
    }
}

public enum ChangeType
{
    Added, 
    Removed, 
    Replaced, 
    Cleared
};

public class Demo
{    
    public static void Main()
    {
        SimpleOrder weekly = new SimpleOrder();
        weekly.Changed += new 
            EventHandler<SimpleOrderChangedEventArgs>(ChangedHandler);

        // The Add method, inherited from Collection, takes OrderItem.
        //
        weekly.Add(new OrderItem(110072674, "Widget", 400, 45.17));
        weekly.Add(new OrderItem(110072675, "Sprocket", 27, 5.3));
        weekly.Add(new OrderItem(101030411, "Motor", 10, 237.5));
        weekly.Add(new OrderItem(110072684, "Gear", 175, 5.17));

        Display(weekly);
        
        // The Contains method of KeyedCollection takes TKey.
        //
        Console.WriteLine("\nContains(101030411): {0}", 
            weekly.Contains(101030411));

        // The default Item property of KeyedCollection takes the key
        // type, Integer. The property is read-only.
        //
        Console.WriteLine("\nweekly[101030411].Description: {0}", 
            weekly[101030411].Description);

        // The Remove method of KeyedCollection takes a key.
        //
        Console.WriteLine("\nRemove(101030411)");
        weekly.Remove(101030411);

        // The Insert method, inherited from Collection, takes an 
        // index and an OrderItem.
        //
        Console.WriteLine("\nInsert(2, new OrderItem(...))");
        weekly.Insert(2, new OrderItem(111033401, "Nut", 10, .5));
         
        // The default Item property is overloaded. One overload comes
        // from KeyedCollection<int, OrderItem>; that overload
        // is read-only, and takes Integer because it retrieves by key. 
        // The other overload comes from Collection<OrderItem>, the 
        // base class of KeyedCollection<int, OrderItem>; it 
        // retrieves by index, so it also takes an Integer. The compiler
        // uses the most-derived overload, from KeyedCollection, so the
        // only way to access SimpleOrder by index is to cast it to
        // Collection<OrderItem>. Otherwise the index is interpreted
        // as a key, and KeyNotFoundException is thrown.
        //
        Collection<OrderItem> coweekly = weekly;
        Console.WriteLine("\ncoweekly[2].Description: {0}", 
            coweekly[2].Description);
 
        Console.WriteLine("\ncoweekly[2] = new OrderItem(...)");
        coweekly[2] = new OrderItem(127700026, "Crank", 27, 5.98);

        OrderItem temp = coweekly[2];

        // The IndexOf method, inherited from Collection<OrderItem>, 
        // takes an OrderItem instead of a key.
        // 
        Console.WriteLine("\nIndexOf(temp): {0}", weekly.IndexOf(temp));

        // The inherited Remove method also takes an OrderItem.
        //
        Console.WriteLine("\nRemove(temp)");
        weekly.Remove(temp);

        Console.WriteLine("\nRemoveAt(0)");
        weekly.RemoveAt(0);

        // Increase the quantity for a line item.
        Console.WriteLine("\ncoweekly(1) = New OrderItem(...)");
        coweekly[1] = new OrderItem(coweekly[1].PartNumber, 
            coweekly[1].Description, coweekly[1].Quantity + 1000, 
            coweekly[1].UnitPrice);

        Display(weekly);

        Console.WriteLine();
        weekly.Clear();
    }
    
    private static void Display(SimpleOrder order)
    {
        Console.WriteLine();
        foreach( OrderItem item in order )
        {
            Console.WriteLine(item);
        }
    }

    private static void ChangedHandler(object source, 
        SimpleOrderChangedEventArgs e)
    {

        OrderItem item = e.ChangedItem;

        if (e.ChangeType==ChangeType.Replaced)
        {
            OrderItem replacement = e.ReplacedWith;

            Console.WriteLine("{0} (quantity {1}) was replaced " +
                "by {2}, (quantity {3}).", item.Description, 
                item.Quantity, replacement.Description, 
                replacement.Quantity);
        }
        else if(e.ChangeType == ChangeType.Cleared)
        {
            Console.WriteLine("The order list was cleared.");
        }
        else
        {
            Console.WriteLine("{0} (quantity {1}) was {2}.", 
                item.Description, item.Quantity, e.ChangeType);
        }
    }
}

// This class represents a simple line item in an order. All the 
// values are immutable except quantity.
// 
public class OrderItem
{
    private int _partNumber;
    private string _description;
    private double _unitPrice;
    private int _quantity;
    
    public int PartNumber { get { return _partNumber; }}
    public string Description { get { return _description; }}
    public double UnitPrice { get { return _unitPrice; }}
    public int Quantity { get { return _quantity; }}
    
    public OrderItem(int partNumber, string description, int quantity, 
        double unitPrice)
    {
        _partNumber = partNumber;
        _description = description;
        _quantity = quantity;
        _unitPrice = unitPrice;
    }
    
    public override string ToString()
    {
        return String.Format(
            "{0,9} {1,6} {2,-12} at {3,8:#,###.00} = {4,10:###,###.00}", 
            PartNumber, _quantity, Description, UnitPrice, 
            UnitPrice * _quantity);
    }
}

/* This code example produces the following output:

Widget (quantity 400) was Added.
Sprocket (quantity 27) was Added.
Motor (quantity 10) was Added.
Gear (quantity 175) was Added.

110072674    400 Widget       at    45.17 =  18,068.00
110072675     27 Sprocket     at     5.30 =     143.10
101030411     10 Motor        at   237.50 =   2,375.00
110072684    175 Gear         at     5.17 =     904.75

Contains(101030411): True

weekly[101030411].Description: Motor

Remove(101030411)
Motor (quantity 10) was Removed.

Insert(2, new OrderItem(...))
Nut (quantity 10) was Added.

coweekly[2].Description: Nut

coweekly[2] = new OrderItem(...)
Nut (quantity 10) was replaced by Crank, (quantity 27).

IndexOf(temp): 2

Remove(temp)
Crank (quantity 27) was Removed.

RemoveAt(0)
Widget (quantity 400) was Removed.

coweekly(1) = New OrderItem(...)
Gear (quantity 175) was replaced by Gear, (quantity 1175).

110072675     27 Sprocket     at     5.30 =     143.10
110072684   1175 Gear         at     5.17 =   6,074.75

The order list was cleared.
 */
Imports System.Collections.Generic
Imports System.Collections.ObjectModel

' This class derives from KeyedCollection and shows how to override
' the protected ClearItems, InsertItem, RemoveItem, and SetItem 
' methods in order to change the behavior of the default Item 
' property and the Add, Clear, Insert, and Remove methods. The
' class implements a Changed event, which is raised by all the
' protected methods.
'
' SimpleOrder is a collection of OrderItem objects, and its key
' is the PartNumber field of OrderItem. PartNumber is an Integer,
' so SimpleOrder inherits KeyedCollection(Of Integer, OrderItem).
' (Note that the key of OrderItem cannot be changed; if it could 
' be changed, SimpleOrder would have to override ChangeItemKey.)
'
Public Class SimpleOrder
    Inherits KeyedCollection(Of Integer, OrderItem)

    Public Event Changed As EventHandler(Of SimpleOrderChangedEventArgs)

    ' This parameterless constructor calls the base class constructor
    ' that specifies a dictionary threshold of 0, so that the internal
    ' dictionary is created as soon as an item is added to the 
    ' collection.
    '
    Public Sub New()
        MyBase.New(Nothing, 0)
    End Sub
    
    ' This is the only method that absolutely must be overridden,
    ' because without it the KeyedCollection cannot extract the
    ' keys from the items. 
    '
    Protected Overrides Function GetKeyForItem( _
        ByVal item As OrderItem) As Integer

        ' In this example, the key is the part number.
        Return item.PartNumber   
    End Function

    Protected Overrides Sub InsertItem( _
        ByVal index As Integer, ByVal newItem As OrderItem)

        MyBase.InsertItem(index, newItem)

        RaiseEvent Changed(Me, New SimpleOrderChangedEventArgs( _
            ChangeType.Added, newItem, Nothing))
    End Sub

    Protected Overrides Sub SetItem(ByVal index As Integer, _
        ByVal newItem As OrderItem)

        Dim replaced As OrderItem = Items(index)
        MyBase.SetItem(index, newItem)

        RaiseEvent Changed(Me, New SimpleOrderChangedEventArgs( _
            ChangeType.Replaced, replaced, newItem))
    End Sub

    Protected Overrides Sub RemoveItem(ByVal index As Integer)

        Dim removedItem As OrderItem = Items(index)
        MyBase.RemoveItem(index)

        RaiseEvent Changed(Me, New SimpleOrderChangedEventArgs( _
            ChangeType.Removed, removedItem, Nothing))
    End Sub

    Protected Overrides Sub ClearItems()
        MyBase.ClearItems()

        RaiseEvent Changed(Me, New SimpleOrderChangedEventArgs( _
            ChangeType.Cleared, Nothing, Nothing))
    End Sub

End Class

' Event argument for the Changed event.
'
Public Class SimpleOrderChangedEventArgs
    Inherits EventArgs

    Private _changedItem As OrderItem
    Private _changeType As ChangeType
    Private _replacedWith As OrderItem

    Public ReadOnly Property ChangedItem As OrderItem
        Get
            Return _changedItem
        End Get
    End Property

    Public ReadOnly Property ChangeType As ChangeType
        Get
            Return _changeType
        End Get
    End Property

    Public ReadOnly Property ReplacedWith As OrderItem
        Get
            Return _replacedWith
        End Get
    End Property

    Public Sub New(ByVal change As ChangeType, ByVal item As OrderItem, _
        ByVal replacement As OrderItem)

        _changeType = change
        _changedItem = item
        _replacedWith = replacement
    End Sub
End Class

Public Enum ChangeType
    Added
    Removed
    Replaced
    Cleared
End Enum

Public Class Demo
    
    Public Shared Sub Main() 
        Dim weekly As New SimpleOrder()
        AddHandler weekly.Changed, AddressOf ChangedHandler

        ' The Add method, inherited from Collection, takes OrderItem.
        '
        weekly.Add(New OrderItem(110072674, "Widget", 400, 45.17))
        weekly.Add(New OrderItem(110072675, "Sprocket", 27, 5.3))
        weekly.Add(New OrderItem(101030411, "Motor", 10, 237.5))
        weekly.Add(New OrderItem(110072684, "Gear", 175, 5.17))

        Display(weekly)
        
        ' The Contains method of KeyedCollection takes TKey.
        '
        Console.WriteLine(vbLf & "Contains(101030411): {0}", _
            weekly.Contains(101030411))

        ' The default Item property of KeyedCollection takes the key
        ' type, Integer. The property is read-only.
        '
        Console.WriteLine(vbLf & "weekly(101030411).Description: {0}", _
            weekly(101030411).Description)

        ' The Remove method of KeyedCollection takes a key.
        '
        Console.WriteLine(vbLf & "Remove(101030411)")
        weekly.Remove(101030411)

        ' The Insert method, inherited from Collection, takes an 
        ' index and an OrderItem.
        '
        Console.WriteLine(vbLf & "Insert(2, New OrderItem(...))")
        weekly.Insert(2, New OrderItem(111033401, "Nut", 10, .5))
         
        ' The default Item property is overloaded. One overload comes
        ' from KeyedCollection(Of Integer, OrderItem); that overload
        ' is read-only, and takes Integer because it retrieves by key. 
        ' The other overload comes from Collection(Of OrderItem), the 
        ' base class of KeyedCollection(Of Integer, OrderItem); it 
        ' retrieves by index, so it also takes an Integer. The compiler
        ' uses the most-derived overload, from KeyedCollection, so the
        ' only way to access SimpleOrder by index is to cast it to
        ' Collection(Of OrderItem). Otherwise the index is interpreted
        ' as a key, and KeyNotFoundException is thrown.
        '
        Dim coweekly As Collection(Of OrderItem) = weekly
        Console.WriteLine(vbLf & "coweekly(2).Description: {0}", _
            coweekly(2).Description)
 
        Console.WriteLine(vbLf & "coweekly(2) = New OrderItem(...)")
        coweekly(2) = New OrderItem(127700026, "Crank", 27, 5.98)

        Dim temp As OrderItem = coweekly(2)

        ' The IndexOf method, inherited from Collection(Of OrderItem), 
        ' takes an OrderItem instead of a key.
        ' 
        Console.WriteLine(vbLf & "IndexOf(temp): {0}", _
            weekly.IndexOf(temp))

        ' The inherited Remove method also takes an OrderItem.
        '
        Console.WriteLine(vbLf & "Remove(temp)")
        weekly.Remove(temp)

        Console.WriteLine(vbLf & "RemoveAt(0)")
        weekly.RemoveAt(0)

        ' Increase the quantity for a line item.
        Console.WriteLine(vbLf & "coweekly(1) = New OrderItem(...)")
        coweekly(1) = New OrderItem(coweekly(1).PartNumber, _
            coweekly(1).Description, coweekly(1).Quantity + 1000, _
            coweekly(1).UnitPrice)

        Display(weekly)

        Console.WriteLine()
        weekly.Clear()
    End Sub
    
    Private Shared Sub Display(ByVal order As SimpleOrder) 
        Console.WriteLine()
        For Each item As OrderItem In  order
            Console.WriteLine(item)
        Next item
    End Sub

    Private Shared Sub ChangedHandler(ByVal source As Object, _
        ByVal e As SimpleOrderChangedEventArgs)

        Dim item As OrderItem = e.ChangedItem

        If e.ChangeType = ChangeType.Replaced Then
            Dim replacement As OrderItem = e.ReplacedWith

            Console.WriteLine("{0} (quantity {1}) was replaced " & _
                "by {2}, (quantity {3}).", item.Description, _
                item.Quantity, replacement.Description, replacement.Quantity)

        ElseIf e.ChangeType = ChangeType.Cleared Then
            Console.WriteLine("The order list was cleared.")

        Else
            Console.WriteLine("{0} (quantity {1}) was {2}.", _
                item.Description, item.Quantity, e.ChangeType)
        End If
    End Sub
End Class

' This class represents a simple line item in an order. All the 
' values are immutable except quantity.
' 
Public Class OrderItem
    
    Private _partNumber As Integer
    Private _description As String
    Private _unitPrice As Double
    Private _quantity As Integer

    Public ReadOnly Property PartNumber As Integer
        Get
            Return _partNumber
        End Get
    End Property

    Public ReadOnly Property Description As String
        Get
            Return _description
        End Get
    End Property

    Public ReadOnly Property UnitPrice As Double
        Get
            Return _unitPrice
        End Get
    End Property
    
    Public ReadOnly Property Quantity() As Integer 
        Get
            Return _quantity
        End Get
    End Property
    
    Public Sub New(ByVal partNumber As Integer, _
                   ByVal description As String, _
                   ByVal quantity As Integer, _
                   ByVal unitPrice As Double) 
        _partNumber = partNumber
        _description = description
        _quantity = quantity
        _unitPrice = unitPrice
    End Sub
        
    Public Overrides Function ToString() As String 
        Return String.Format( _
            "{0,9} {1,6} {2,-12} at {3,8:#,###.00} = {4,10:###,###.00}", _
            PartNumber, _quantity, Description, UnitPrice, _
            UnitPrice * _quantity)
    End Function
End Class

' This code example produces the following output:
'
'Widget (quantity 400) was Added.
'Sprocket (quantity 27) was Added.
'Motor (quantity 10) was Added.
'Gear (quantity 175) was Added.
'
'110072674    400 Widget       at    45.17 =  18,068.00
'110072675     27 Sprocket     at     5.30 =     143.10
'101030411     10 Motor        at   237.50 =   2,375.00
'110072684    175 Gear         at     5.17 =     904.75
'
'Contains(101030411): True
'
'weekly(101030411).Description: Motor
'
'Remove(101030411)
'Motor (quantity 10) was Removed.
'
'Insert(2, New OrderItem(...))
'Nut (quantity 10) was Added.
'
'coweekly(2).Description: Nut
'
'coweekly(2) = New OrderItem(...)
'Nut (quantity 10) was replaced by Crank, (quantity 27).
'
'IndexOf(temp): 2
'
'Remove(temp)
'Crank (quantity 27) was Removed.
'
'RemoveAt(0)
'Widget (quantity 400) was Removed.
'
'coweekly(1) = New OrderItem(...)
'Gear (quantity 175) was replaced by Gear, (quantity 1175).
'
'110072675     27 Sprocket     at     5.30 =     143.10
'110072684   1175 Gear         at     5.17 =   6,074.75
'
'The order list was cleared.

설명

KeyedCollection<TKey,TItem> 클래스는 o (1)와 접근 하는 O (1) 인덱싱된 검색 및 키 검색을 모두 제공 합니다.The KeyedCollection<TKey,TItem> class provides both O(1) indexed retrieval and keyed retrieval that approaches O(1). 추상 형식 인지 추상 기본 클래스는 생성 된 제네릭 형식의 각 않기 때문에 무한 추상 형식 설정 보다 정확 하 게 합니다.It is an abstract type, or more accurately an infinite set of abstract types, because each of its constructed generic types is an abstract base class. KeyedCollection<TKey,TItem>를 사용 하려면 해당 하는 생성 된 형식에서 컬렉션 형식을 파생 시킵니다.To use KeyedCollection<TKey,TItem>, derive your collection type from the appropriate constructed type.

KeyedCollection<TKey,TItem> 클래스는 IList<T> 제네릭 인터페이스를 기반으로 하는 컬렉션과 IDictionary<TKey,TValue> 제네릭 인터페이스를 기반으로 하는 컬렉션 간의 하이브리드입니다.The KeyedCollection<TKey,TItem> class is a hybrid between a collection based on the IList<T> generic interface and a collection based on the IDictionary<TKey,TValue> generic interface. IList<T> 제네릭 인터페이스를 기반으로 하는 컬렉션과 마찬가지로 KeyedCollection<TKey,TItem>는 인덱싱된 항목 목록입니다.Like collections based on the IList<T> generic interface, KeyedCollection<TKey,TItem> is an indexed list of items. IDictionary<TKey,TValue> 제네릭 인터페이스를 기반으로 하는 컬렉션과 마찬가지로 KeyedCollection<TKey,TItem>에는 각 요소와 연결 된 키가 있습니다.Like collections based on the IDictionary<TKey,TValue> generic interface, KeyedCollection<TKey,TItem> has a key associated with each element.

사전과 달리 KeyedCollection<TKey,TItem>의 요소는 키/값 쌍이 아닙니다. 대신 전체 요소가 값이 고 키가 값에 포함 됩니다.Unlike dictionaries, an element of KeyedCollection<TKey,TItem> is not a key/value pair; instead, the entire element is the value and the key is embedded within the value. 예를 들어 KeyedCollection\<String,String>에서 파생 된 컬렉션의 요소 (Visual Basic의KeyedCollection(Of String, String))는 "John Doe Jr" 일 수 있습니다.For example, an element of a collection derived from KeyedCollection\<String,String> (KeyedCollection(Of String, String) in Visual Basic) might be "John Doe Jr." 값은 "John Doe Jr."where the value is "John Doe Jr." 그리고 키는 "Doe";입니다. 또는 정수 키를 포함 하는 직원 레코드의 컬렉션을 KeyedCollection\<int,Employee>에서 파생할 수 있습니다.and the key is "Doe"; or a collection of employee records containing integer keys could be derived from KeyedCollection\<int,Employee>. 추상 GetKeyForItem 메서드는 요소에서 키를 추출 합니다.The abstract GetKeyForItem method extracts the key from the element.

기본적으로 KeyedCollection<TKey,TItem>에는 Dictionary 속성으로 얻을 수 있는 조회 사전이 포함 되어 있습니다.By default, the KeyedCollection<TKey,TItem> includes a lookup dictionary that you can obtain with the Dictionary property. 항목이 KeyedCollection<TKey,TItem>에 추가 되 면 항목의 키가 한 번 추출 되 고 더 빠른 검색을 위해 조회 사전에 저장 됩니다.When an item is added to the KeyedCollection<TKey,TItem>, the item's key is extracted once and saved in the lookup dictionary for faster searches. KeyedCollection<TKey,TItem>를 만들 때 사전 생성 임계값을 지정 하 여이 동작을 재정의 합니다.This behavior is overridden by specifying a dictionary creation threshold when you create the KeyedCollection<TKey,TItem>. 조회 사전은 해당 임계값을 초과 하는 요소 수가 처음으로 생성 됩니다.The lookup dictionary is created the first time the number of elements exceeds that threshold. 임계값으로-1을 지정 하면 조회 사전이 만들어지지 않습니다.If you specify -1 as the threshold, the lookup dictionary is never created.

참고

내부 조회 사전이 사용 되는 경우 TItem 참조 형식이 면 컬렉션의 모든 항목에 대 한 참조를 포함 하 고 TItem 값 형식인 경우 컬렉션에 있는 모든 항목의 복사본을 포함 합니다.When the internal lookup dictionary is used, it contains references to all the items in the collection if TItem is a reference type, or copies of all the items in the collection if TItem is a value type. 따라서 TItem 값 형식인 경우 조회 사전을 사용 하는 것이 적절 하지 않을 수 있습니다.Thus, using the lookup dictionary may not be appropriate if TItem is a value type.

Item[TKey] 속성을 사용 하 여 인덱스 또는 키로 항목에 액세스할 수 있습니다.You can access an item by its index or key by using the Item[TKey] property. 키가 없으면 항목을 추가할 수 있지만 이러한 항목 이후에 인덱스로 액세스할 수 있습니다.You can add items without a key, but these items can subsequently be accessed only by index.

생성자

KeyedCollection<TKey,TItem>()

기본 같음 비교자를 사용하는 KeyedCollection<TKey,TItem> 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the KeyedCollection<TKey,TItem> class that uses the default equality comparer.

KeyedCollection<TKey,TItem>(IEqualityComparer<TKey>)

지정된 같음 비교자를 사용하는 KeyedCollection<TKey,TItem> 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the KeyedCollection<TKey,TItem> class that uses the specified equality comparer.

KeyedCollection<TKey,TItem>(IEqualityComparer<TKey>, Int32)

지정된 같음 비교자를 사용하고 지정된 임계값이 초과되면 조회 사전을 만드는 KeyedCollection<TKey,TItem> 클래스의 새 인스턴스를 초기화합니다.Initializes a new instance of the KeyedCollection<TKey,TItem> class that uses the specified equality comparer and creates a lookup dictionary when the specified threshold is exceeded.

속성

Comparer

컬렉션에 있는 키의 같음 여부를 확인하는 데 사용되는 제네릭 같음 비교자를 가져옵니다.Gets the generic equality comparer that is used to determine equality of keys in the collection.

Count

Collection<T>에 실제로 포함된 요소의 수를 가져옵니다.Gets the number of elements actually contained in the Collection<T>.

(다음에서 상속됨 Collection<T>)
Dictionary

KeyedCollection<TKey,TItem>의 조회 사전을 가져옵니다.Gets the lookup dictionary of the KeyedCollection<TKey,TItem>.

Item[Int32]

지정한 인덱스에 있는 요소를 가져오거나 설정합니다.Gets or sets the element at the specified index.

(다음에서 상속됨 Collection<T>)
Item[TKey]

요소를 지정한 키와 함께 가져옵니다.Gets the element with the specified key.

Items

IList<T>을 둘러싸는 Collection<T> 래퍼를 가져옵니다.Gets a IList<T> wrapper around the Collection<T>.

(다음에서 상속됨 Collection<T>)

메서드

Add(T)

개체를 Collection<T>의 끝 부분에 추가합니다.Adds an object to the end of the Collection<T>.

(다음에서 상속됨 Collection<T>)
ChangeItemKey(TItem, TKey)

조회 사전의 지정된 요소와 연결된 키를 변경합니다.Changes the key associated with the specified element in the lookup dictionary.

Clear()

Collection<T>에서 요소를 모두 제거합니다.Removes all elements from the Collection<T>.

(다음에서 상속됨 Collection<T>)
ClearItems()

KeyedCollection<TKey,TItem>에서 요소를 모두 제거합니다.Removes all elements from the KeyedCollection<TKey,TItem>.

Contains(TKey)

지정된 키가 있는 요소가 컬렉션에 포함되어 있는지 여부를 확인합니다.Determines whether the collection contains an element with the specified key.

CopyTo(T[], Int32)

대상 배열의 지정된 인덱스에서 시작하여 전체 Collection<T>을 호환되는 1차원 Array에 복사합니다.Copies the entire Collection<T> to a compatible one-dimensional Array, starting at the specified index of the target array.

(다음에서 상속됨 Collection<T>)
Equals(Object)

지정한 개체가 현재 개체와 같은지를 확인합니다.Determines whether the specified object is equal to the current object.

(다음에서 상속됨 Object)
GetEnumerator()

Collection<T>를 반복하는 열거자를 반환합니다.Returns an enumerator that iterates through the Collection<T>.

(다음에서 상속됨 Collection<T>)
GetHashCode()

기본 해시 함수로 작동합니다.Serves as the default hash function.

(다음에서 상속됨 Object)
GetKeyForItem(TItem)

파생 클래스에서 구현되면 지정된 요소에서 키를 추출합니다.When implemented in a derived class, extracts the key from the specified element.

GetType()

현재 인스턴스의 Type을 가져옵니다.Gets the Type of the current instance.

(다음에서 상속됨 Object)
IndexOf(T)

지정된 개체를 검색하고, 전체 Collection<T>에서 처음으로 검색한 개체의 인덱스(0부터 시작)를 반환합니다.Searches for the specified object and returns the zero-based index of the first occurrence within the entire Collection<T>.

(다음에서 상속됨 Collection<T>)
Insert(Int32, T)

Collection<T>의 지정된 인덱스에 요소를 삽입합니다.Inserts an element into the Collection<T> at the specified index.

(다음에서 상속됨 Collection<T>)
InsertItem(Int32, T)

Collection<T>의 지정된 인덱스에 요소를 삽입합니다.Inserts an element into the Collection<T> at the specified index.

(다음에서 상속됨 Collection<T>)
InsertItem(Int32, TItem)

KeyedCollection<TKey,TItem>의 지정된 인덱스에 요소를 삽입합니다.Inserts an element into the KeyedCollection<TKey,TItem> at the specified index.

MemberwiseClone()

현재 Object의 단순 복사본을 만듭니다.Creates a shallow copy of the current Object.

(다음에서 상속됨 Object)
Remove(TKey)

KeyedCollection<TKey,TItem>에서 키가 지정된 요소를 제거합니다.Removes the element with the specified key from the KeyedCollection<TKey,TItem>.

RemoveAt(Int32)

Collection<T>의 지정한 인덱스에서 요소를 제거합니다.Removes the element at the specified index of the Collection<T>.

(다음에서 상속됨 Collection<T>)
RemoveItem(Int32)

KeyedCollection<TKey,TItem>의 지정된 인덱스에 있는 요소를 제거합니다.Removes the element at the specified index of the KeyedCollection<TKey,TItem>.

SetItem(Int32, T)

지정한 인덱스에 있는 요소를 바꿉니다.Replaces the element at the specified index.

(다음에서 상속됨 Collection<T>)
SetItem(Int32, TItem)

지정된 인덱스에 있는 항목을 지정된 항목으로 바꿉니다.Replaces the item at the specified index with the specified item.

ToString()

현재 개체를 나타내는 string을 반환합니다.Returns a string that represents the current object.

(다음에서 상속됨 Object)
TryGetValue(TKey, TItem)

지정된 키를 사용하여 컬렉션에서 항목을 가져오려고 시도합니다.Tries to get an item from the collection using the specified key.

명시적 인터페이스 구현

ICollection.CopyTo(Array, Int32)

특정 ICollection 인덱스부터 시작하여 Array의 요소를 Array에 복사합니다.Copies the elements of the ICollection to an Array, starting at a particular Array index.

(다음에서 상속됨 Collection<T>)
ICollection.IsSynchronized

ICollection에 대한 액세스가 동기화되어 스레드로부터 안전하게 보호되는지를 나타내는 값을 가져옵니다.Gets a value indicating whether access to the ICollection is synchronized (thread safe).

(다음에서 상속됨 Collection<T>)
ICollection.SyncRoot

ICollection에 대한 액세스를 동기화하는 데 사용할 수 있는 개체를 가져옵니다.Gets an object that can be used to synchronize access to the ICollection.

(다음에서 상속됨 Collection<T>)
ICollection<T>.IsReadOnly

ICollection<T>이 읽기 전용인지 여부를 나타내는 값을 가져옵니다.Gets a value indicating whether the ICollection<T> is read-only.

(다음에서 상속됨 Collection<T>)
IEnumerable.GetEnumerator()

컬렉션 전체를 반복하는 열거자를 반환합니다.Returns an enumerator that iterates through a collection.

(다음에서 상속됨 Collection<T>)
IList.Add(Object)

IList에 항목을 추가합니다.Adds an item to the IList.

(다음에서 상속됨 Collection<T>)
IList.Contains(Object)

IList에 특정 값이 들어 있는지 여부를 확인합니다.Determines whether the IList contains a specific value.

(다음에서 상속됨 Collection<T>)
IList.IndexOf(Object)

IList에서 특정 항목의 인덱스를 결정합니다.Determines the index of a specific item in the IList.

(다음에서 상속됨 Collection<T>)
IList.Insert(Int32, Object)

항목을 IList의 지정한 인덱스에 삽입합니다.Inserts an item into the IList at the specified index.

(다음에서 상속됨 Collection<T>)
IList.IsFixedSize

IList의 크기가 고정되어 있는지를 나타내는 값을 가져옵니다.Gets a value indicating whether the IList has a fixed size.

(다음에서 상속됨 Collection<T>)
IList.IsReadOnly

IList이 읽기 전용인지 여부를 나타내는 값을 가져옵니다.Gets a value indicating whether the IList is read-only.

(다음에서 상속됨 Collection<T>)
IList.Item[Int32]

지정한 인덱스에 있는 요소를 가져오거나 설정합니다.Gets or sets the element at the specified index.

(다음에서 상속됨 Collection<T>)
IList.Remove(Object)

IList에서 맨 처음 발견되는 특정 개체를 제거합니다.Removes the first occurrence of a specific object from the IList.

(다음에서 상속됨 Collection<T>)

확장 메서드

ToImmutableArray<TSource>(IEnumerable<TSource>)

지정된 컬렉션에서 변경할 수 없는 배열을 만듭니다.Creates an immutable array from the specified collection.

ToImmutableDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

원본 키에 변형 함수를 적용하여 기존 요소 컬렉션에서 변경할 수 없는 사전을 생성합니다.Constructs an immutable dictionary from an existing collection of elements, applying a transformation function to the source keys.

ToImmutableDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>)

시퀀스의 일부 변환에 따라 변경할 수 없는 사전을 생성합니다.Constructs an immutable dictionary based on some transformation of a sequence.

ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>)

시퀀스를 열거 및 변형하고 해당 시퀀스의 내용에 대한 변경할 수 없는 사전을 생성합니다.Enumerates and transforms a sequence, and produces an immutable dictionary of its contents.

ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IEqualityComparer<TKey>)

시퀀스를 열거 및 변형하고, 지정된 키 비교자를 사용하여 해당 시퀀스의 내용에 대한 변경할 수 없는 사전을 생성합니다.Enumerates and transforms a sequence, and produces an immutable dictionary of its contents by using the specified key comparer.

ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IEqualityComparer<TKey>, IEqualityComparer<TValue>)

시퀀스를 열거 및 변형하고, 지정된 키 및 값 비교자를 사용하여 해당 시퀀스의 내용에 대한 변경할 수 없는 사전을 생성합니다.Enumerates and transforms a sequence, and produces an immutable dictionary of its contents by using the specified key and value comparers.

ToImmutableHashSet<TSource>(IEnumerable<TSource>)

시퀀스를 열거하고 해당 시퀀스의 내용에 대한 변경할 수 없는 해시 집합을 생성합니다.Enumerates a sequence and produces an immutable hash set of its contents.

ToImmutableHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)

시퀀스를 열거하고, 해당 시퀀스의 내용에 대한 변경할 수 없는 해시 집합을 생성하며, 형식 집합에 지정된 같음 비교자를 사용합니다.Enumerates a sequence, produces an immutable hash set of its contents, and uses the specified equality comparer for the set type.

ToImmutableList<TSource>(IEnumerable<TSource>)

시퀀스를 열거하고 해당 시퀀스의 내용에 대한 변경할 수 없는 목록을 생성합니다.Enumerates a sequence and produces an immutable list of its contents.

ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>)

시퀀스를 열거 및 변환하고 해당 시퀀스의 내용에 대한 변경할 수 없는 정렬된 사전을 생성합니다.Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents.

ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IComparer<TKey>)

시퀀스를 열거 및 변형하고, 지정된 키 비교자를 사용하여 해당 시퀀스의 내용에 대한 변경할 수 없는 정렬된 사전을 생성합니다.Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents by using the specified key comparer.

ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IComparer<TKey>, IEqualityComparer<TValue>)

시퀀스를 열거 및 변형하고, 지정된 키 및 값 비교자를 사용하여 해당 시퀀스의 내용에 대한 변경할 수 없는 정렬된 사전을 생성합니다.Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents by using the specified key and value comparers.

ToImmutableSortedSet<TSource>(IEnumerable<TSource>)

시퀀스를 열거하고 해당 시퀀스의 내용에 대한 변경할 수 없는 정렬된 집합을 생성합니다.Enumerates a sequence and produces an immutable sorted set of its contents.

ToImmutableSortedSet<TSource>(IEnumerable<TSource>, IComparer<TSource>)

시퀀스를 열거하고, 해당 시퀀스의 내용에 대한 변경할 수 없는 정렬된 집합을 생성하며, 지정된 비교자를 사용합니다.Enumerates a sequence, produces an immutable sorted set of its contents, and uses the specified comparer.

CopyToDataTable<T>(IEnumerable<T>)

제네릭 매개 변수 TDataTable인 지정된 입력 DataRow 개체를 사용하여 IEnumerable<T> 개체의 복사본이 들어 있는 DataRow을 반환합니다.Returns a DataTable that contains copies of the DataRow objects, given an input IEnumerable<T> object where the generic parameter T is DataRow.

CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption)

제네릭 매개 변수 TDataRow인 지정된 입력 DataTable 개체를 사용하여 IEnumerable<T> 개체를 지정된 DataRow에 복사합니다.Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter T is DataRow.

CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption, FillErrorEventHandler)

제네릭 매개 변수 TDataRow인 지정된 입력 DataTable 개체를 사용하여 IEnumerable<T> 개체를 지정된 DataRow에 복사합니다.Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter T is DataRow.

Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>)

시퀀스에 누적기 함수를 적용합니다.Applies an accumulator function over a sequence.

Aggregate<TSource,TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>)

시퀀스에 누적기 함수를 적용합니다.Applies an accumulator function over a sequence. 지정된 시드 값은 초기 누적기 값으로 사용됩니다.The specified seed value is used as the initial accumulator value.

Aggregate<TSource,TAccumulate,TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, Func<TAccumulate,TResult>)

시퀀스에 누적기 함수를 적용합니다.Applies an accumulator function over a sequence. 지정된 시드 값은 초기 누적기 값으로 사용되고 지정된 함수는 결과 값을 선택하는 데 사용됩니다.The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value.

All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스의 모든 요소가 특정 조건에 맞는지 확인합니다.Determines whether all elements of a sequence satisfy a condition.

Any<TSource>(IEnumerable<TSource>)

시퀀스에 요소가 하나라도 있는지 확인합니다.Determines whether a sequence contains any elements.

Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에 특정 조건에 맞는 요소가 있는지 확인합니다.Determines whether any element of a sequence satisfies a condition.

Append<TSource>(IEnumerable<TSource>, TSource)

시퀀스의 끝에 값을 추가합니다.Appends a value to the end of the sequence.

AsEnumerable<TSource>(IEnumerable<TSource>)

IEnumerable<T>로 형식화된 입력을 반환합니다.Returns the input typed as IEnumerable<T>.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Decimal 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Double 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Int32 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Int64 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Decimal 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Double 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Int32 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Int64 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Single 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence.

Average<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Single 값 시퀀스의 평균을 계산합니다.Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

Cast<TResult>(IEnumerable)

IEnumerable의 요소를 지정된 형식으로 캐스팅합니다.Casts the elements of an IEnumerable to the specified type.

Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

두 시퀀스를 연결합니다.Concatenates two sequences.

Contains<TSource>(IEnumerable<TSource>, TSource)

기본 같음 비교자를 사용하여 시퀀스에 지정된 요소가 들어 있는지 확인합니다.Determines whether a sequence contains a specified element by using the default equality comparer.

Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>)

지정된 IEqualityComparer<T>를 사용하여 시퀀스에 지정된 요소가 들어 있는지 확인합니다.Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>.

Count<TSource>(IEnumerable<TSource>)

시퀀스의 요소 수를 반환합니다.Returns the number of elements in a sequence.

Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

지정된 시퀀스에서 특정 조건에 맞는 요소 수를 나타내는 숫자를 반환합니다.Returns a number that represents how many elements in the specified sequence satisfy a condition.

DefaultIfEmpty<TSource>(IEnumerable<TSource>)

지정된 시퀀스의 요소를 반환하거나, 시퀀스가 비어 있으면 형식 매개 변수의 기본값을 반환합니다.Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty.

DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource)

지정된 시퀀스의 요소를 반환하거나, 시퀀스가 비어 있으면 singleton 컬렉션의 지정된 값을 반환합니다.Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty.

Distinct<TSource>(IEnumerable<TSource>)

기본 같음 비교자로 값을 비교하여 시퀀스에서 고유 요소를 반환합니다.Returns distinct elements from a sequence by using the default equality comparer to compare values.

Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)

지정된 IEqualityComparer<T>로 값을 비교하여 시퀀스에서 고유 요소를 반환합니다.Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values.

ElementAt<TSource>(IEnumerable<TSource>, Int32)

시퀀스에서 지정된 인덱스의 요소를 반환합니다.Returns the element at a specified index in a sequence.

ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32)

시퀀스에서 지정된 인덱스의 요소를 반환하거나, 인덱스가 범위를 벗어나면 기본 값을 반환합니다.Returns the element at a specified index in a sequence or a default value if the index is out of range.

Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

기본 같음 비교자로 값을 비교하여 두 시퀀스의 차집합을 구합니다.Produces the set difference of two sequences by using the default equality comparer to compare values.

Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

지정된 IEqualityComparer<T>로 값을 비교하여 두 시퀀스의 차집합을 구합니다.Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values.

First<TSource>(IEnumerable<TSource>)

시퀀스의 첫 번째 요소를 반환합니다.Returns the first element of a sequence.

First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에서 지정된 조건에 맞는 첫 번째 요소를 반환합니다.Returns the first element in a sequence that satisfies a specified condition.

FirstOrDefault<TSource>(IEnumerable<TSource>)

시퀀스의 첫 번째 요소를 반환하거나, 시퀀스에 요소가 없으면 기본값을 반환합니다.Returns the first element of a sequence, or a default value if the sequence contains no elements.

FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에서 특정 조건에 맞는 첫 번째 요소를 반환하거나, 이러한 요소가 없으면 기본값을 반환합니다.Returns the first element of the sequence that satisfies a condition or a default value if no such element is found.

GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

지정된 키 선택기 함수에 따라 시퀀스의 요소를 그룹화합니다.Groups the elements of a sequence according to a specified key selector function.

GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>)

지정된 키 선택기 함수에 따라 지정된 비교자로 키를 비교하여 시퀀스의 요소를 그룹화합니다.Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.

GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>)

지정된 키 선택기 함수에 따라 시퀀스의 요소를 그룹화하고 지정된 함수를 사용하여 각 그룹의 요소를 투영합니다.Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function.

GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>)

키 선택기 함수에 따라 시퀀스의 요소를 그룹화합니다.Groups the elements of a sequence according to a key selector function. 키는 비교자를 통해 비교되고 각 그룹의 요소는 지정된 함수를 통해 투영됩니다.The keys are compared by using a comparer and each group's elements are projected by using a specified function.

GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>)

지정된 키 누적기 함수에 따라 시퀀스의 요소를 그룹화하고 각 그룹의 결과 값과 해당 키를 만듭니다.Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.

GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>, IEqualityComparer<TKey>)

지정된 키 누적기 함수에 따라 시퀀스의 요소를 그룹화하고 각 그룹의 결과 값과 해당 키를 만듭니다.Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 키는 지정된 비교자를 통해 비교됩니다.The keys are compared by using a specified comparer.

GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>)

지정된 키 누적기 함수에 따라 시퀀스의 요소를 그룹화하고 각 그룹의 결과 값과 해당 키를 만듭니다.Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 각 그룹의 요소는 지정된 함수를 통해 투영됩니다.The elements of each group are projected by using a specified function.

GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>, IEqualityComparer<TKey>)

지정된 키 누적기 함수에 따라 시퀀스의 요소를 그룹화하고 각 그룹의 결과 값과 해당 키를 만듭니다.Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 키 값은 지정된 비교자를 통해 비교되고 각 그룹의 요소는 지정된 함수를 통해 투영됩니다.Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function.

GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>)

키가 같은지 여부에 따라 두 시퀀스의 요소를 연관시키고 결과를 그룹화합니다.Correlates the elements of two sequences based on equality of keys and groups the results. 기본 같음 비교자를 사용하여 키를 비교합니다.The default equality comparer is used to compare keys.

GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>,TResult>, IEqualityComparer<TKey>)

키가 같은지 여부에 따라 두 시퀀스의 요소를 연관시키고 결과를 그룹화합니다.Correlates the elements of two sequences based on key equality and groups the results. 지정된 IEqualityComparer<T>를 사용하여 키를 비교합니다.A specified IEqualityComparer<T> is used to compare keys.

Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

기본 같음 비교자로 값을 비교하여 두 시퀀스의 교집합을 구합니다.Produces the set intersection of two sequences by using the default equality comparer to compare values.

Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

지정된 IEqualityComparer<T>로 값을 비교하여 두 시퀀스의 교집합을 구합니다.Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values.

Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>)

일치하는 키를 기준으로 두 시퀀스의 요소를 연관시킵니다.Correlates the elements of two sequences based on matching keys. 기본 같음 비교자를 사용하여 키를 비교합니다.The default equality comparer is used to compare keys.

Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>, IEqualityComparer<TKey>)

일치하는 키를 기준으로 두 시퀀스의 요소를 연관시킵니다.Correlates the elements of two sequences based on matching keys. 지정된 IEqualityComparer<T>를 사용하여 키를 비교합니다.A specified IEqualityComparer<T> is used to compare keys.

Last<TSource>(IEnumerable<TSource>)

시퀀스의 마지막 요소를 반환합니다.Returns the last element of a sequence.

Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에서 지정된 조건에 맞는 마지막 요소를 반환합니다.Returns the last element of a sequence that satisfies a specified condition.

LastOrDefault<TSource>(IEnumerable<TSource>)

시퀀스의 마지막 요소를 반환하거나, 시퀀스에 요소가 없으면 기본값을 반환합니다.Returns the last element of a sequence, or a default value if the sequence contains no elements.

LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에서 특정 조건에 맞는 마지막 요소를 반환하거나, 이러한 요소가 없으면 기본값을 반환합니다.Returns the last element of a sequence that satisfies a condition or a default value if no such element is found.

LongCount<TSource>(IEnumerable<TSource>)

시퀀스의 총 요소 수를 나타내는 Int64를 반환합니다.Returns an Int64 that represents the total number of elements in a sequence.

LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에서 특정 조건에 맞는 요소 수를 나타내는 Int64를 반환합니다.Returns an Int64 that represents how many elements in a sequence satisfy a condition.

Max<TSource>(IEnumerable<TSource>)

제네릭 시퀀스의 최대값을 반환합니다.Returns the maximum value in a generic sequence.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 Decimal 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum Decimal value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 Double 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum Double value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 Int32 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum Int32 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 Int64 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum Int64 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 nullable Decimal 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 nullable Double 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum nullable Double value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 nullable Int32 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 nullable Int64 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 nullable Single 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum nullable Single value.

Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 Single 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the maximum Single value.

Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>)

제네릭 시퀀스의 각 요소에 대해 변형 함수를 호출하고 최대 결과 값을 반환합니다.Invokes a transform function on each element of a generic sequence and returns the maximum resulting value.

Min<TSource>(IEnumerable<TSource>)

제네릭 시퀀스의 최소값을 반환합니다.Returns the minimum value in a generic sequence.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 Decimal 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum Decimal value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 Double 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum Double value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 Int32 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum Int32 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 Int64 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum Int64 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 nullable Decimal 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 nullable Double 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum nullable Double value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 nullable Int32 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 nullable Int64 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 nullable Single 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum nullable Single value.

Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 Single 값을 반환합니다.Invokes a transform function on each element of a sequence and returns the minimum Single value.

Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>)

제네릭 시퀀스의 각 요소에 대해 변형 함수를 호출하고 최소 결과 값을 반환합니다.Invokes a transform function on each element of a generic sequence and returns the minimum resulting value.

OfType<TResult>(IEnumerable)

지정된 형식에 따라 IEnumerable의 요소를 필터링합니다.Filters the elements of an IEnumerable based on a specified type.

OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

시퀀스의 요소를 키에 따라 오름차순으로 정렬합니다.Sorts the elements of a sequence in ascending order according to a key.

OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>)

지정된 비교자를 사용하여 시퀀스의 요소를 오름차순으로 정렬합니다.Sorts the elements of a sequence in ascending order by using a specified comparer.

OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

시퀀스의 요소를 키에 따라 내림차순으로 정렬합니다.Sorts the elements of a sequence in descending order according to a key.

OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>)

지정된 비교자를 사용하여 시퀀스의 요소를 내림차순으로 정렬합니다.Sorts the elements of a sequence in descending order by using a specified comparer.

Prepend<TSource>(IEnumerable<TSource>, TSource)

시퀀스의 시작 부분에 값을 추가합니다.Adds a value to the beginning of the sequence.

Reverse<TSource>(IEnumerable<TSource>)

시퀀스의 요소 순서를 반전합니다.Inverts the order of the elements in a sequence.

Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>)

시퀀스의 각 요소를 새 폼에 투영합니다.Projects each element of a sequence into a new form.

Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>)

요소의 인덱스를 통합하여 시퀀스의 각 요소를 새 폼에 투영합니다.Projects each element of a sequence into a new form by incorporating the element's index.

SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TResult>>)

시퀀스의 각 요소를 IEnumerable<T>에 투영하고 결과 시퀀스를 단일 시퀀스로 평면화합니다.Projects each element of a sequence to an IEnumerable<T> and flattens the resulting sequences into one sequence.

SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TResult>>)

시퀀스의 각 요소를 IEnumerable<T>에 투영하고 결과 시퀀스를 단일 시퀀스로 평면화합니다.Projects each element of a sequence to an IEnumerable<T>, and flattens the resulting sequences into one sequence. 각 소스 요소의 인덱스는 해당 요소의 투영된 폼에 사용됩니다.The index of each source element is used in the projected form of that element.

SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>)

시퀀스의 각 요소를 IEnumerable<T>로 투영하고, 결과 시퀀스를 단일 시퀀스로 평면화한 다음 포함된 각 요소에 대해 결과 선택기 함수를 호출합니다.Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein.

SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>)

시퀀스의 각 요소를 IEnumerable<T>로 투영하고, 결과 시퀀스를 단일 시퀀스로 평면화한 다음 포함된 각 요소에 대해 결과 선택기 함수를 호출합니다.Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. 각 소스 요소의 인덱스는 해당 요소의 투영된 중간 폼에 사용됩니다.The index of each source element is used in the intermediate projected form of that element.

SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

해당 형식에 대한 기본 같음 비교자를 통해 요소를 비교하여 두 시퀀스가 서로 같은지 확인합니다.Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type.

SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

지정된 IEqualityComparer<T>를 통해 요소를 비교하여 두 시퀀스가 서로 같은지 확인합니다.Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>.

Single<TSource>(IEnumerable<TSource>)

시퀀스의 유일한 요소를 반환하고, 시퀀스에 요소가 정확히 하나 들어 있지 않으면 예외를 throw합니다.Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence.

Single<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에서 지정된 조건에 맞는 유일한 요소를 반환하고, 이러한 요소가 둘 이상 있으면 예외를 throw합니다.Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists.

SingleOrDefault<TSource>(IEnumerable<TSource>)

시퀀스의 유일한 요소를 반환하거나 시퀀스가 비어 있으면 기본값을 반환합니다. 시퀀스에 요소가 둘 이상 있으면 예외를 throw합니다.Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.

SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

시퀀스에서 지정된 조건에 맞는 유일한 요소를 반환하거나 이러한 요소가 없으면 기본값을 반환합니다. 조건에 맞는 요소가 둘 이상 있으면 예외를 throw합니다.Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition.

Skip<TSource>(IEnumerable<TSource>, Int32)

시퀀스에서 지정된 수의 요소를 건너뛴 다음 나머지 요소를 반환합니다.Bypasses a specified number of elements in a sequence and then returns the remaining elements.

SkipLast<TSource>(IEnumerable<TSource>, Int32)

소스 컬렉션의 마지막 count 요소가 생략된 source의 요소를 포함하는 열거 가능한 새 컬렉션을 반환합니다.Returns a new enumerable collection that contains the elements from source with the last count elements of the source collection omitted.

SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

지정된 조건이 true이면 시퀀스에 있는 요소를 무시하고 나머지 요소를 반환합니다.Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.

SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>)

지정된 조건이 true이면 시퀀스에 있는 요소를 무시하고 나머지 요소를 반환합니다.Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. 조건자 함수의 논리에 요소의 인덱스가 사용됩니다.The element's index is used in the logic of the predicate function.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Decimal 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Double>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Double 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int32>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Int32 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int64>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Int64 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Decimal 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Double 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Int32 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Int64 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 nullable Single 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence.

Sum<TSource>(IEnumerable<TSource>, Func<TSource,Single>)

입력 시퀀스의 각 요소에 대해 변형 함수를 호출하여 가져온 Single 값 시퀀스의 합을 계산합니다.Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence.

Take<TSource>(IEnumerable<TSource>, Int32)

시퀀스 시작 위치에서 지정된 수의 연속 요소를 반환합니다.Returns a specified number of contiguous elements from the start of a sequence.

TakeLast<TSource>(IEnumerable<TSource>, Int32)

source의 마지막 count 요소를 포함하는 열거 가능한 새 컬렉션을 반환합니다.Returns a new enumerable collection that contains the last count elements from source.

TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

지정된 조건이 true인 동안 시퀀스에서 요소를 반환합니다.Returns elements from a sequence as long as a specified condition is true.

TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>)

지정된 조건이 true인 동안 시퀀스에서 요소를 반환합니다.Returns elements from a sequence as long as a specified condition is true. 조건자 함수의 논리에 요소의 인덱스가 사용됩니다.The element's index is used in the logic of the predicate function.

ToArray<TSource>(IEnumerable<TSource>)

IEnumerable<T>을 사용하여 배열을 만듭니다.Creates an array from a IEnumerable<T>.

ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

지정된 키 선택기 함수에 따라 Dictionary<TKey,TValue>을 사용하여 IEnumerable<T>를 만듭니다.Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function.

ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>)

지정된 키 선택기 함수와 키 비교자에 따라 Dictionary<TKey,TValue>을 사용하여 IEnumerable<T>를 만듭니다.Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function and key comparer.

ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>)

지정된 키 선택기와 요소 선택기 함수에 따라 Dictionary<TKey,TValue>을 사용하여 IEnumerable<T>를 만듭니다.Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector and element selector functions.

ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>)

지정된 키 선택기 함수, 비교자 및 요소 선택기 함수에 따라 Dictionary<TKey,TValue>을 사용하여 IEnumerable<T>를 만듭니다.Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function, a comparer, and an element selector function.

ToHashSet<TSource>(IEnumerable<TSource>)

IEnumerable<T>에서 HashSet<T>을 만듭니다.Creates a HashSet<T> from an IEnumerable<T>.

ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>)

comparer를 사용하여 키를 비교하는 IEnumerable<T>에서 HashSet<T>를 생성합니다.Creates a HashSet<T> from an IEnumerable<T> using the comparer to compare keys.

ToList<TSource>(IEnumerable<TSource>)

IEnumerable<T>에서 List<T>을 만듭니다.Creates a List<T> from an IEnumerable<T>.

ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>)

지정된 키 선택기 함수에 따라 Lookup<TKey,TElement>을 사용하여 IEnumerable<T>를 만듭니다.Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function.

ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>)

지정된 키 선택기 함수와 키 비교자에 따라 Lookup<TKey,TElement>을 사용하여 IEnumerable<T>를 만듭니다.Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function and key comparer.

ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>)

지정된 키 선택기와 요소 선택기 함수에 따라 Lookup<TKey,TElement>을 사용하여 IEnumerable<T>를 만듭니다.Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to specified key selector and element selector functions.

ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>)

지정된 키 선택기 함수, 비교자 및 요소 선택기 함수에 따라 Lookup<TKey,TElement>을 사용하여 IEnumerable<T>을 만듭니다.Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function, a comparer and an element selector function.

Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>)

기본 같음 비교자를 사용하여 두 시퀀스의 합집합을 구합니다.Produces the set union of two sequences by using the default equality comparer.

Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>)

지정된 IEqualityComparer<T>를 사용하여 두 시퀀스의 합집합을 구합니다.Produces the set union of two sequences by using a specified IEqualityComparer<T>.

Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>)

조건자에 따라 값의 시퀀스를 필터링합니다.Filters a sequence of values based on a predicate.

Where<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>)

조건자에 따라 값의 시퀀스를 필터링합니다.Filters a sequence of values based on a predicate. 조건자 함수의 논리에 각 요소의 인덱스가 사용됩니다.Each element's index is used in the logic of the predicate function.

Zip<TFirst,TSecond>(IEnumerable<TFirst>, IEnumerable<TSecond>)

지정된 두 시퀀스의 요소를 사용하여 튜플 시퀀스를 생성합니다.Produces a sequence of tuples with elements from the two specified sequences.

Zip<TFirst,TSecond,TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst,TSecond,TResult>)

지정된 함수를 두 시퀀스의 해당 요소에 적용하여 결과 시퀀스를 만듭니다.Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results.

AsParallel(IEnumerable)

쿼리를 병렬화할 수 있도록 합니다.Enables parallelization of a query.

AsParallel<TSource>(IEnumerable<TSource>)

쿼리를 병렬화할 수 있도록 합니다.Enables parallelization of a query.

AsQueryable(IEnumerable)

IEnumerableIQueryable로 변환합니다.Converts an IEnumerable to an IQueryable.

AsQueryable<TElement>(IEnumerable<TElement>)

제네릭 IEnumerable<T>을 제네릭 IQueryable<T>로 변환합니다.Converts a generic IEnumerable<T> to a generic IQueryable<T>.

Ancestors<T>(IEnumerable<T>)

소스 컬렉션에 있는 모든 노드의 상위 항목을 포함 하는 요소의 컬렉션을 반환 합니다.Returns a collection of elements that contains the ancestors of every node in the source collection.

Ancestors<T>(IEnumerable<T>, XName)

소스 컬렉션에 있는 모든 노드의 상위 항목이 들어 있는 필터링 된 요소 컬렉션을 반환 합니다.Returns a filtered collection of elements that contains the ancestors of every node in the source collection. 일치하는 XName이 있는 요소만 컬렉션에 포함됩니다.Only elements that have a matching XName are included in the collection.

DescendantNodes<T>(IEnumerable<T>)

소스 컬렉션에 있는 모든 문서 및 요소의 하위 노드의 컬렉션을 반환합니다.Returns a collection of the descendant nodes of every document and element in the source collection.

Descendants<T>(IEnumerable<T>)

소스 컬렉션에 있는 모든 요소 및 문서의 하위 요소가 들어 있는 요소 컬렉션을 반환합니다.Returns a collection of elements that contains the descendant elements of every element and document in the source collection.

Descendants<T>(IEnumerable<T>, XName)

소스 컬렉션에 있는 모든 요소 및 문서의 하위 요소가 들어 있는 필터링된 요소 컬렉션을 반환합니다.Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. 일치하는 XName이 있는 요소만 컬렉션에 포함됩니다.Only elements that have a matching XName are included in the collection.

Elements<T>(IEnumerable<T>)

소스 컬렉션에 있는 자식 컬렉션의 모든 요소 및 문서의 요소를 반환합니다.Returns a collection of the child elements of every element and document in the source collection.

Elements<T>(IEnumerable<T>, XName)

소스 컬렉션의 필터링 된 자식 컬렉션을 모든 요소 및 문서의 요소를 반환합니다.Returns a filtered collection of the child elements of every element and document in the source collection. 일치하는 XName이 있는 요소만 컬렉션에 포함됩니다.Only elements that have a matching XName are included in the collection.

InDocumentOrder<T>(IEnumerable<T>)

모든 노드가 문서 순으로 정렬 된 소스 컬렉션에 포함 된 노드의 컬렉션을 반환 합니다.Returns a collection of nodes that contains all nodes in the source collection, sorted in document order.

Nodes<T>(IEnumerable<T>)

소스 컬렉션에 있는 자식 컬렉션의 모든 문서 및 요소의 노드를 반환합니다.Returns a collection of the child nodes of every document and element in the source collection.

Remove<T>(IEnumerable<T>)

부모 노드에서 소스 컬렉션에 있는 모든 노드를 제거합니다.Removes every node in the source collection from its parent node.

적용 대상

추가 정보