IList IList IList IList Interface

定義

インデックスによって個別にアクセスできるオブジェクトの非ジェネリック コレクションを表します。

public interface class IList : System::Collections::ICollection
[System.Runtime.InteropServices.ComVisible(true)]
public interface IList : System.Collections.ICollection
type IList = interface
    interface ICollection
    interface IEnumerable
Public Interface IList
Implements ICollection
派生
属性
実装

次の例の実装を示します、IList単純なリスト、固定サイズのリストを作成するインターフェイス。

using System;
using System.Collections;

class Program
{
    static void Main()
    {
        SimpleList test = new SimpleList();

        // Populate the List
        Console.WriteLine("Populate the List");
        test.Add("one");
        test.Add("two");
        test.Add("three");
        test.Add("four");
        test.Add("five");
        test.Add("six");
        test.Add("seven");
        test.Add("eight");
        test.PrintContents();
        Console.WriteLine();

        // Remove elements from the list
        Console.WriteLine("Remove elements from the list");
        test.Remove("six");
        test.Remove("eight");
        test.PrintContents();
        Console.WriteLine();

        // Add an element to the end of the list
        Console.WriteLine("Add an element to the end of the list");
        test.Add("nine");
        test.PrintContents();
        Console.WriteLine();

        // Insert an element into the middle of the list
        Console.WriteLine("Insert an element into the middle of the list");
        test.Insert(4, "number");
        test.PrintContents();
        Console.WriteLine();

        // Check for specific elements in the list
        Console.WriteLine("Check for specific elements in the list");
        Console.WriteLine("List contains \"three\": {0}", test.Contains("three"));
        Console.WriteLine("List contains \"ten\": {0}", test.Contains("ten"));
    }
} // class Program

class SimpleList : IList
{
    private object[] _contents = new object[8];
    private int _count;

    public SimpleList()
    {
        _count = 0;
    }

    // IList Members
    public int Add(object value)
    {
        if (_count < _contents.Length)
        {
            _contents[_count] = value;
            _count++;

            return (_count - 1);
        }
        else
        {
            return -1;
        }
    }

    public void Clear()
    {
        _count = 0;
    }

    public bool Contains(object value)
    {
        bool inList = false;
        for (int i = 0; i < Count; i++)
        {
            if (_contents[i] == value)
            {
                inList = true;
                break;
            }
        }
        return inList;
    }

    public int IndexOf(object value)
    {
        int itemIndex = -1;
        for (int i = 0; i < Count; i++)
        {
            if (_contents[i] == value)
            {
                itemIndex = i;
                break;
            }
        }
        return itemIndex;
    }

    public void Insert(int index, object value)
    {
        if ((_count + 1 <= _contents.Length) && (index < Count) && (index >= 0))
        {
            _count++;

            for (int i = Count - 1; i > index; i--)
            {
                _contents[i] = _contents[i - 1];
            }
            _contents[index] = value;
        }
    }

    public bool IsFixedSize
    {
        get
        {
            return true;
        }
    }

    public bool IsReadOnly
    {
        get
        {
            return false;
        }
    }

    public void Remove(object value)
    {
        RemoveAt(IndexOf(value));
    }

    public void RemoveAt(int index)
    {
        if ((index >= 0) && (index < Count))
        {
            for (int i = index; i < Count - 1; i++)
            {
                _contents[i] = _contents[i + 1];
            }
            _count--;
        }
    }

    public object this[int index]
    {
        get
        {
            return _contents[index];
        }
        set
        {
            _contents[index] = value;
        }
    }

    // ICollection Members

    public void CopyTo(Array array, int index)
    {
        int j = index;
        for (int i = 0; i < Count; i++)
        {
            array.SetValue(_contents[i], j);
            j++;
        }
    }

    public int Count
    {
        get
        {
            return _count;
        }
    }

    public bool IsSynchronized
    {
        get
        {
            return false;
        }
    }

    // Return the current instance since the underlying store is not
    // publicly available.
    public object SyncRoot
    {
        get
        {
            return this;
        }
    }

    // IEnumerable Members

    public IEnumerator GetEnumerator()
    {
        // Refer to the IEnumerator documentation for an example of
        // implementing an enumerator.
        throw new Exception("The method or operation is not implemented.");
    }

    public void PrintContents()
    {
        Console.WriteLine("List has a capacity of {0} and currently has {1} elements.", _contents.Length, _count);
        Console.Write("List contents:");
        for (int i = 0; i < Count; i++)
        {
            Console.Write(" {0}", _contents[i]);
        }
        Console.WriteLine();
    }
}

// This code produces output similar to the following:
// Populate the List:
// List has a capacity of 8 and currently has 8 elements.
// List contents: one two three four five six seven eight
//
// Remove elements from the list:
// List has a capacity of 8 and currently has 6 elements.
// List contents: one two three four five seven
//
// Add an element to the end of the list:
// List has a capacity of 8 and currently has 7 elements.
// List contents: one two three four five seven nine
//
// Insert an element into the middle of the list:
// List has a capacity of 8 and currently has 8 elements.
// List contents: one two three four number five seven nine
//
// Check for specific elements in the list:
// List contains "three": True
// List contains "ten": False
Imports System
Imports System.Collections

Public Class Program

    Shared Sub Main()

        Dim myList As New SimpleList()

        ' Populate the List
        Console.WriteLine("Populate the List")
        myList.Add("one")
        myList.Add("two")
        myList.Add("three")
        myList.Add("four")
        myList.Add("five")
        myList.Add("six")
        myList.Add("seven")
        myList.Add("eight")
        myList.PrintContents()
        Console.WriteLine()

        ' Remove elements from the list
        Console.WriteLine("Remove elements from the list")
        myList.Remove("six")
        myList.Remove("eight")
        myList.PrintContents()
        Console.WriteLine()

        ' Add an element to the end of the list
        Console.WriteLine("Add an element to the end of the list")
        myList.Add("nine")
        myList.PrintContents()
        Console.WriteLine()

        ' Insert an element into the middle of the list
        Console.WriteLine("Insert an element into the middle of the list")
        myList.Insert(4, "number")
        myList.PrintContents()
        Console.WriteLine()

        ' Check for specific elements in the list
        Console.WriteLine("Check for specific elements in the list")
        Console.WriteLine("List contains 'three': {0}", myList.Contains("three"))
        Console.WriteLine("List contains 'ten': {0}", myList.Contains("ten"))

    End Sub
End Class ' class Program

Public Class SimpleList
    Implements IList

    Private _contents(8) As Object
    Private _count As Integer

    Public Sub New()

        _count = 0
    End Sub

    ' IList Members
    Public Function Add(ByVal value As Object) As Integer Implements IList.Add

        If (_count < _contents.Length - 1) Then

            _contents(_count) = value
            _count = _count + 1

            Return (_count - 1)

        Else

            Return -1
        End If
    End Function

    Public Sub Clear() Implements IList.Clear
        _count = 0
    End Sub

    Public Function Contains(ByVal value As Object) As Boolean Implements IList.Contains

        Dim inList As Boolean = False

        Dim i As Integer
        For i = 0 To Count

            If _contents(i) = value Then

                inList = True
                Exit For

            End If

        Next i

        Return inList
    End Function

    Public Function IndexOf(ByVal value As Object) As Integer Implements IList.IndexOf

        Dim itemIndex As Integer = -1

        Dim i As Integer
        For i = 0 To Count

            If _contents(i) = value Then

                itemIndex = i
                Exit For

            End If

        Next i

        Return itemIndex
    End Function

    Public Sub Insert(ByVal index As Integer, ByVal value As Object) Implements IList.Insert

        If (_count + 1) <= (_contents.Length - 1) And (index < Count) And (index >= 0) Then

            _count = _count + 1

            Dim i As Integer
            For i = Count - 1 To index

                _contents(i) = _contents(i - 1)
            Next i

            _contents(index) = value
        End If
    End Sub

    Public ReadOnly Property IsFixedSize() As Boolean Implements IList.IsFixedSize
        Get
            Return True
        End Get
    End Property

    Public ReadOnly Property IsReadOnly() As Boolean Implements IList.IsReadOnly

        Get
            Return False
        End Get
    End Property

    Public Sub Remove(ByVal value As Object) Implements IList.Remove
        RemoveAt(IndexOf(value))
    End Sub

    Public Sub RemoveAt(ByVal index As Integer) Implements IList.RemoveAt

        If index >= 0 And index < Count Then

            Dim i As Integer
            For i = index To Count - 1

                _contents(i) = _contents(i + 1)
            Next i
            _count = _count - 1

        End If
    End Sub

    Public Property Item(ByVal index As Integer) As Object Implements IList.Item

        Get
            Return _contents(index)
        End Get

        Set(ByVal value As Object)
            _contents(index) = value
        End Set
    End Property

    ' ICollection Members

    Public Sub CopyTo(ByVal array As Array, ByVal index As Integer) Implements ICollection.CopyTo
        Dim j As Integer = index
        Dim i As Integer
        For i = 0 To Count
            array.SetValue(_contents(i), j)
            j = j + 1
        Next i
    End Sub

    Public ReadOnly Property Count() As Integer Implements ICollection.Count
        Get
            Return _count
        End Get
    End Property

    Public ReadOnly Property IsSynchronized() As Boolean Implements ICollection.IsSynchronized
        Get
            Return False
        End Get
    End Property

    ' Return the current instance since the underlying store is not
    ' publicly available.
    Public ReadOnly Property SyncRoot() As Object Implements ICollection.SyncRoot
        Get
            Return Me
        End Get
    End Property

    ' IEnumerable Members
    Public Function GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator

        ' Refer to the IEnumerator documentation for an example of
        ' implementing an enumerator.
        Throw New Exception("The method or operation is not implemented.")
    End Function

    Public Sub PrintContents()

        Console.WriteLine("List has a capacity of {0} and currently has {1} elements.", _contents.Length - 1, _count)
        Console.Write("List contents:")

        Dim i As Integer
        For i = 0 To Count

            Console.Write(" {0}", _contents(i))
        Next i

        Console.WriteLine()

    End Sub
End Class

' This code produces output similar to the following:
' Populate the List:
' List has a capacity of 8 and currently has 8 elements.
' List contents: one two three four five six seven eight
'
' Remove elements from the list:
' List has a capacity of 8 and currently has 6 elements.
' List contents: one two three four five seven
'
' Add an element to the end of the list:
' List has a capacity of 8 and currently has 7 elements.
' List contents: one two three four five seven nine
'
' Insert an element into the middle of the list:
' List has a capacity of 8 and currently has 8 elements.
' List contents: one two three four number five seven nine
'
' Check for specific elements in the list:
' List contains "three": True
' List contains "ten": False

注釈

IList 子孫である、ICollectionインターフェイスし、はすべての非ジェネリック リストの基本インターフェイスです。 IList 実装は、次の 3 つのカテゴリに分類されます。 読み取り専用、固定サイズ、および可変サイズ。 読み取り専用IList変更ことはできません。 固定サイズIList加算または要素の削除を許可しませんが、既存の要素は変更できます。 可変サイズIList追加、削除、および要素の変更を許可します。

このインターフェイスのジェネリックのバージョンを参照してください。System.Collections.Generic.IList<T>します。

プロパティ

Count Count Count Count

ICollection に格納されている要素の数を取得します。

(Inherited from ICollection)
IsFixedSize IsFixedSize IsFixedSize IsFixedSize

IList が固定サイズかどうかを示す値を取得します。

IsReadOnly IsReadOnly IsReadOnly IsReadOnly

IList が読み取り専用かどうかを示す値を取得します。

IsSynchronized IsSynchronized IsSynchronized IsSynchronized

ICollection へのアクセスが同期されている (スレッド セーフである) かどうかを示す値を取得します。

(Inherited from ICollection)
Item[Int32] Item[Int32] Item[Int32] Item[Int32]

指定したインデックスにある要素を取得または設定します。

SyncRoot SyncRoot SyncRoot SyncRoot

ICollection へのアクセスを同期するために使用できるオブジェクトを取得します。

(Inherited from ICollection)

メソッド

Add(Object) Add(Object) Add(Object) Add(Object)

IList に項目を追加します。

Clear() Clear() Clear() Clear()

IList からすべての項目を削除します。

Contains(Object) Contains(Object) Contains(Object) Contains(Object)

IList に特定の値が格納されているかどうかを判断します。

CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32)

ICollection の要素を Array にコピーします。Array の特定のインデックスからコピーが開始されます。

(Inherited from ICollection)
GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

コレクションを反復処理する列挙子を返します。

(Inherited from IEnumerable)
IndexOf(Object) IndexOf(Object) IndexOf(Object) IndexOf(Object)

IList 内の特定の項目のインデックスを確認します。

Insert(Int32, Object) Insert(Int32, Object) Insert(Int32, Object) Insert(Int32, Object)

指定したインデックスの IList に項目を挿入します。

Remove(Object) Remove(Object) Remove(Object) Remove(Object)

特定のオブジェクトが IList 内にあるときに、最初に出現したものを削除します。

RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32)

指定したインデックスにある IList 項目を削除します。

Extension Methods

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

IEnumerable の要素を、指定した型にキャストします。

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

指定された型に基づいて IEnumerable の要素をフィルター処理します。

AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable)

クエリの並列化を有効にします。

AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable)

IEnumerableIQueryable に変換します。

適用対象

こちらもご覧ください