IProducerConsumerCollection<T> 接口

定义

定义供制造者/使用者用来操作线程安全集合的方法。Defines methods to manipulate thread-safe collections intended for producer/consumer usage. 此接口提供一个统一的表示(为生产者/消费者集合),从而更高级别抽象如 BlockingCollection<T> 可以使用集合作为基础的存储机制。This interface provides a unified representation for producer/consumer collections so that higher level abstractions such as BlockingCollection<T> can use the collection as the underlying storage mechanism.

generic <typename T>
public interface class IProducerConsumerCollection : System::Collections::Generic::IEnumerable<T>, System::Collections::ICollection
public interface IProducerConsumerCollection<T> : System.Collections.Generic.IEnumerable<T>, System.Collections.ICollection
type IProducerConsumerCollection<'T> = interface
    interface seq<'T>
    interface IEnumerable
    interface ICollection
type IProducerConsumerCollection<'T> = interface
    interface seq<'T>
    interface ICollection
    interface IEnumerable
Public Interface IProducerConsumerCollection(Of T)
Implements ICollection, IEnumerable(Of T)

类型参数

T

指定集合中的元素的类型。Specifies the type of elements in the collection.

派生
实现

示例

下面的示例演示实现的堆栈数据结构 System.Collections.Concurrent.IProducerConsumerCollection<T>The following example shows a stack data structure that implements System.Collections.Concurrent.IProducerConsumerCollection<T>.

using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Concurrent;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

// Sample implementation of IProducerConsumerCollection(T)
// -- in this case, a thread-safe stack.
public class SafeStack<T> : IProducerConsumerCollection<T>
{
    // Used for enforcing thread-safety
    private object m_lockObject = new object();

    // We'll use a regular old Stack for our core operations
    private Stack<T> m_sequentialStack = null;

    //
    // Constructors
    //
    public SafeStack()
    {
        m_sequentialStack = new Stack<T>();
    }

    public SafeStack(IEnumerable<T> collection)
    {
        m_sequentialStack = new Stack<T>(collection);
    }

    //
    // Safe Push/Pop support
    //
    public void Push(T item)
    {
        lock (m_lockObject) m_sequentialStack.Push(item);
    }

    public bool TryPop(out T item)
    {
        bool rval = true;
        lock (m_lockObject)
        {
            if (m_sequentialStack.Count == 0) { item = default(T); rval = false; }
            else
            {
                item = m_sequentialStack.Pop();
            }
        }
        return rval;
    }

    //
    // IProducerConsumerCollection(T) support
    //
    public bool TryTake(out T item)
    {
        return TryPop(out item);
    }

    public bool TryAdd(T item)
    {
        Push(item);
        return true; // Push doesn't fail
    }

    public T[] ToArray()
    {
        T[] rval = null;
        lock (m_lockObject) rval = m_sequentialStack.ToArray();
        return rval;
    }

    public void CopyTo(T[] array, int index)
    {
        lock (m_lockObject) m_sequentialStack.CopyTo(array, index);
    }

    //
    // Support for IEnumerable(T)
    //
    public IEnumerator<T> GetEnumerator()
    {
        // The performance here will be unfortunate for large stacks,
        // but thread-safety is effectively implemented.
        Stack<T> stackCopy = null;
        lock (m_lockObject) stackCopy = new Stack<T>(m_sequentialStack);
        return stackCopy.GetEnumerator();
    }

    //
    // Support for IEnumerable
    //
    IEnumerator IEnumerable.GetEnumerator()
    {
        return ((IEnumerable<T>)this).GetEnumerator();
    }

    //
    // Support for ICollection
    //
    public bool IsSynchronized
    {
        get { return true; }
    }

    public object SyncRoot
    {
        get { return m_lockObject; }
    }

    public int Count
    {
        get { return m_sequentialStack.Count; }
    }

    public void CopyTo(Array array, int index)
    {
        lock (m_lockObject) ((ICollection)m_sequentialStack).CopyTo(array, index);
    }
}

public class Program
{
    static void Main()
    {
        TestSafeStack();

        // Keep the console window open in debug mode.
        Console.WriteLine("Press any key to exit.");
        Console.ReadKey();
    }

    // Test our implementation of IProducerConsumerCollection(T)
    // Demonstrates:
    //      IPCC(T).TryAdd()
    //      IPCC(T).TryTake()
    //      IPCC(T).CopyTo()
    static void TestSafeStack()
    {
        SafeStack<int> stack = new SafeStack<int>();
        IProducerConsumerCollection<int> ipcc = (IProducerConsumerCollection<int>)stack;

        // Test Push()/TryAdd()
        stack.Push(10); Console.WriteLine("Pushed 10");
        ipcc.TryAdd(20); Console.WriteLine("IPCC.TryAdded 20");
        stack.Push(15); Console.WriteLine("Pushed 15");

        int[] testArray = new int[3];

        // Try CopyTo() within boundaries
        try
        {
            ipcc.CopyTo(testArray, 0);
            Console.WriteLine("CopyTo() within boundaries worked, as expected");
        }
        catch (Exception e)
        {
            Console.WriteLine("CopyTo() within boundaries unexpectedly threw an exception: {0}", e.Message);
        }

        // Try CopyTo() that overflows
        try
        {
            ipcc.CopyTo(testArray, 1);
            Console.WriteLine("CopyTo() with index overflow worked, and it SHOULD NOT HAVE");
        }
        catch (Exception e)
        {
            Console.WriteLine("CopyTo() with index overflow threw an exception, as expected: {0}", e.Message);
        }

        // Test enumeration
        Console.Write("Enumeration (should be three items): ");
        foreach (int item in stack) Console.Write("{0} ", item);
        Console.WriteLine("");

        // Test TryPop()
        int popped = 0;
        if (stack.TryPop(out popped))
        {
            Console.WriteLine("Successfully popped {0}", popped);
        }
        else
        {
            Console.WriteLine("FAILED to pop!!");
        }

        // Test Count
        Console.WriteLine("stack count is {0}, should be 2", stack.Count);

        // Test TryTake()
        if (ipcc.TryTake(out popped))
        {
            Console.WriteLine("Successfully IPCC-TryTaked {0}", popped);
        }
        else
        {
            Console.WriteLine("FAILED to IPCC.TryTake!!");
        }
    }
}
Imports System.Collections.Concurrent

Module IProdCon
    ' Sample implementation of IProducerConsumerCollection(T) -- in this case,
    ' a thread-safe stack.
    Public Class SafeStack(Of T)
        Implements IProducerConsumerCollection(Of T)

        ' Used for enforcing thread-safety
        Private m_lockObject As New Object()

        ' We'll use a regular old Stack for our core operations
        Private m_sequentialStack As Stack(Of T) = Nothing

        '
        ' Constructors
        '
        Public Sub New()
            m_sequentialStack = New Stack(Of T)()
        End Sub

        Public Sub New(ByVal collection As IEnumerable(Of T))
            m_sequentialStack = New Stack(Of T)(collection)
        End Sub

        '
        ' Safe Push/Pop support
        '
        Public Sub Push(ByVal item As T)
            SyncLock m_lockObject
                m_sequentialStack.Push(item)
            End SyncLock
        End Sub

        Public Function TryPop(ByRef item As T) As Boolean
            Dim rval As Boolean = True
            SyncLock m_lockObject
                If m_sequentialStack.Count = 0 Then
                    item = Nothing
                    rval = False
                Else
                    item = m_sequentialStack.Pop()
                End If
            End SyncLock
            Return rval
        End Function

        '
        ' IProducerConsumerCollection(T) support
        '
        Public Function TryTake(ByRef item As T) As Boolean Implements IProducerConsumerCollection(Of T).TryTake
            Return TryPop(item)
        End Function

        Public Function TryAdd(ByVal item As T) As Boolean Implements IProducerConsumerCollection(Of T).TryAdd
            Push(item)
            ' Push doesn't fail
            Return True
        End Function

        Public Function ToArray() As T() Implements IProducerConsumerCollection(Of T).ToArray
            Dim rval As T() = Nothing
            SyncLock m_lockObject
                rval = m_sequentialStack.ToArray()
            End SyncLock
            Return rval
        End Function

        Public Sub CopyTo(ByVal array As T(), ByVal index As Integer) Implements IProducerConsumerCollection(Of T).CopyTo
            SyncLock m_lockObject
                m_sequentialStack.CopyTo(array, index)
            End SyncLock
        End Sub



        '
        ' Support for IEnumerable(T)
        '
        Public Function GetEnumerator() As IEnumerator(Of T) Implements IEnumerable(Of T).GetEnumerator
            ' The performance here will be unfortunate for large stacks,
            ' but thread-safety is effectively implemented.
            Dim stackCopy As Stack(Of T) = Nothing
            SyncLock m_lockObject
                stackCopy = New Stack(Of T)(m_sequentialStack)
            End SyncLock
            Return stackCopy.GetEnumerator()
        End Function


        '
        ' Support for IEnumerable
        '
        Private Function GetEnumerator2() As IEnumerator Implements IEnumerable.GetEnumerator
            Return DirectCast(Me, IEnumerable(Of T)).GetEnumerator()
        End Function

        ' 
        ' Support for ICollection
        '
        Public ReadOnly Property IsSynchronized() As Boolean Implements ICollection.IsSynchronized
            Get
                Return True
            End Get
        End Property

        Public ReadOnly Property SyncRoot() As Object Implements ICollection.SyncRoot
            Get
                Return m_lockObject
            End Get
        End Property

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

        Public Sub CopyTo(ByVal array As Array, ByVal index As Integer) Implements ICollection.CopyTo
            SyncLock m_lockObject
                DirectCast(m_sequentialStack, ICollection).CopyTo(array, index)
            End SyncLock
        End Sub
    End Class

    ' Test our implementation of IProducerConsumerCollection(T)
    ' Demonstrates:
    ' IPCC(T).TryAdd()
    ' IPCC(T).TryTake()
    ' IPCC(T).CopyTo()
    Private Sub TestSafeStack()
        Dim stack As New SafeStack(Of Integer)()
        Dim ipcc As IProducerConsumerCollection(Of Integer) = DirectCast(stack, IProducerConsumerCollection(Of Integer))

        ' Test Push()/TryAdd()
        stack.Push(10)
        Console.WriteLine("Pushed 10")
        ipcc.TryAdd(20)
        Console.WriteLine("IPCC.TryAdded 20")
        stack.Push(15)
        Console.WriteLine("Pushed 15")

        Dim testArray As Integer() = New Integer(2) {}

        ' Try CopyTo() within boundaries
        Try
            ipcc.CopyTo(testArray, 0)
            Console.WriteLine("CopyTo() within boundaries worked, as expected")
        Catch e As Exception
            Console.WriteLine("CopyTo() within boundaries unexpectedly threw an exception: {0}", e.Message)
        End Try

        ' Try CopyTo() that overflows
        Try
            ipcc.CopyTo(testArray, 1)
            Console.WriteLine("CopyTo() with index overflow worked, and it SHOULD NOT HAVE")
        Catch e As Exception
            Console.WriteLine("CopyTo() with index overflow threw an exception, as expected: {0}", e.Message)
        End Try

        ' Test enumeration
        Console.Write("Enumeration (should be three items): ")
        For Each item As Integer In stack
            Console.Write("{0} ", item)
        Next
        Console.WriteLine("")

        ' Test TryPop()
        Dim popped As Integer = 0
        If stack.TryPop(popped) Then
            Console.WriteLine("Successfully popped {0}", popped)
        Else
            Console.WriteLine("FAILED to pop!!")
        End If

        ' Test Count
        Console.WriteLine("stack count is {0}, should be 2", stack.Count)

        ' Test TryTake()
        If ipcc.TryTake(popped) Then
            Console.WriteLine("Successfully IPCC-TryTaked {0}", popped)
        Else
            Console.WriteLine("FAILED to IPCC.TryTake!!")
        End If
    End Sub

    Sub Main()
        TestSafeStack()

        ' Keep the console window open in debug mode
        Console.WriteLine("Press any key to exit.")
        Console.ReadKey()

    End Sub

End Module

注解

有关详细信息,请参阅线程安全集合BlockingCollection 概述For more information, see Thread-Safe Collections and BlockingCollection Overview.

属性

Count

获取 ICollection 中包含的元素数。Gets the number of elements contained in the ICollection.

(继承自 ICollection)
IsSynchronized

获取一个值,该值指示是否同步对 ICollection 的访问(线程安全)。Gets a value indicating whether access to the ICollection is synchronized (thread safe).

(继承自 ICollection)
SyncRoot

获取可用于同步对 ICollection 的访问的对象。Gets an object that can be used to synchronize access to the ICollection.

(继承自 ICollection)

方法

CopyTo(Array, Int32)

从特定的 ICollection 索引开始,将 Array 的元素复制到一个 Array 中。Copies the elements of the ICollection to an Array, starting at a particular Array index.

(继承自 ICollection)
CopyTo(T[], Int32)

从指定的索引位置开始,将 IProducerConsumerCollection<T> 的元素复制到 Array 中。Copies the elements of the IProducerConsumerCollection<T> to an Array, starting at a specified index.

GetEnumerator()

返回循环访问集合的枚举数。Returns an enumerator that iterates through a collection.

(继承自 IEnumerable)
ToArray()

IProducerConsumerCollection<T> 中包含的元素复制到新数组中。Copies the elements contained in the IProducerConsumerCollection<T> to a new array.

TryAdd(T)

尝试将一个对象添加到 IProducerConsumerCollection<T> 中。Attempts to add an object to the IProducerConsumerCollection<T>.

TryTake(T)

尝试从 IProducerConsumerCollection<T> 中移除和返回一个对象。Attempts to remove and return an object from the IProducerConsumerCollection<T>.

扩展方法

ToImmutableArray<TSource>(IEnumerable<TSource>)

从指定的集合创建一个不可变数组。Creates an immutable array from the specified collection.

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

通过向源键应用转换函数,从现有元素集合构造一个不可变字典。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>)

基于对序列进行某种形式的转换来构造一个不可变字典。Constructs an immutable dictionary based on some transformation of a sequence.

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

枚举并转换序列,然后生成其内容的不可变字典。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>)

枚举并转换序列,然后使用指定的键比较器生成其内容的不可变字典。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>)

枚举并转换序列,然后使用指定的键和值比较器生成其内容的不可变字典。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>)

枚举序列,并生成其内容的不可变哈希集。Enumerates a sequence and produces an immutable hash set of its contents.

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

枚举序列,生成其内容的不可变哈希集,并为集类型使用指定的相等性比较器。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>)

枚举序列,并生成其内容的不可变列表。Enumerates a sequence and produces an immutable list of its contents.

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

枚举并转换序列,然后生成其内容的不可变排序字典。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>)

枚举并转换序列,然后使用指定的键比较器生成其内容的不可变排序字典。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>)

枚举并转换序列,然后使用指定的键和值比较器生成其内容的不可变排序字典。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>)

枚举序列,并生成其内容的不可变排序集。Enumerates a sequence and produces an immutable sorted set of its contents.

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

枚举序列,生成其内容的不可变排序集,并使用指定的比较器。Enumerates a sequence, produces an immutable sorted set of its contents, and uses the specified comparer.

CopyToDataTable<T>(IEnumerable<T>)

在给定其泛型参数 TDataTable 的输入 DataRow 对象的情况下,返回包含 IEnumerable<T> 对象副本的 DataRowReturns 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)

在给定其泛型参数 TDataRow 的输入 DataTable 对象的情况下,将 IEnumerable<T> 对象复制到指定的 DataRowCopies 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)

在给定其泛型参数 TDataRow 的输入 DataTable 对象的情况下,将 IEnumerable<T> 对象复制到指定的 DataRowCopies 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>)

对序列应用累加器函数。Applies an accumulator function over a sequence.

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

对序列应用累加器函数。Applies an accumulator function over a sequence. 将指定的种子值用作累加器初始值。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>)

对序列应用累加器函数。Applies an accumulator function over a sequence. 将指定的种子值用作累加器的初始值,并使用指定的函数选择结果值。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>)

确定序列中的所有元素是否都满足条件。Determines whether all elements of a sequence satisfy a condition.

Any<TSource>(IEnumerable<TSource>)

确定序列是否包含任何元素。Determines whether a sequence contains any elements.

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

确定序列中是否存在任意一个元素满足条件。Determines whether any element of a sequence satisfies a condition.

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

将一个值追加到序列末尾。Appends a value to the end of the sequence.

AsEnumerable<TSource>(IEnumerable<TSource>)

返回类型化为 IEnumerable<T> 的输入。Returns the input typed as IEnumerable<T>.

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

计算 Decimal 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>)

计算 Double 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>)

计算 Int32 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>)

计算 Int64 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Decimal 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Double 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Int32 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Int64 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Single 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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>)

计算 Single 值序列的平均值,这些值可通过对输入序列的每个元素调用转换函数获得。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)

IEnumerable 的元素强制转换为指定的类型。Casts the elements of an IEnumerable to the specified type.

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

连接两个序列。Concatenates two sequences.

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

通过使用默认的相等比较器确定序列是否包含指定的元素。Determines whether a sequence contains a specified element by using the default equality comparer.

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

通过使用指定的 IEqualityComparer<T> 确定序列是否包含指定的元素。Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>.

Count<TSource>(IEnumerable<TSource>)

返回序列中的元素数量。Returns the number of elements in a sequence.

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

返回表示在指定的序列中满足条件的元素数量的数字。Returns a number that represents how many elements in the specified sequence satisfy a condition.

DefaultIfEmpty<TSource>(IEnumerable<TSource>)

返回指定序列中的元素;如果序列为空,则返回单一实例集合中的类型参数的默认值。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)

返回指定序列中的元素;如果序列为空,则返回单一实例集合中的指定值。Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty.

Distinct<TSource>(IEnumerable<TSource>)

通过使用默认的相等比较器对值进行比较,返回序列中的非重复元素。Returns distinct elements from a sequence by using the default equality comparer to compare values.

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

通过使用指定的 IEqualityComparer<T> 对值进行比较,返回序列中的非重复元素。Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values.

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

返回序列中指定索引处的元素。Returns the element at a specified index in a sequence.

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

返回序列中指定索引处的元素;如果索引超出范围,则返回默认值。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>)

通过使用默认的相等比较器对值进行比较,生成两个序列的差集。Produces the set difference of two sequences by using the default equality comparer to compare values.

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

通过使用指定的 IEqualityComparer<T> 对值进行比较,生成两个序列的差集。Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values.

First<TSource>(IEnumerable<TSource>)

返回序列中的第一个元素。Returns the first element of a sequence.

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

返回序列中满足指定条件的第一个元素。Returns the first element in a sequence that satisfies a specified condition.

FirstOrDefault<TSource>(IEnumerable<TSource>)

返回序列中的第一个元素;如果序列中不包含任何元素,则返回默认值。Returns the first element of a sequence, or a default value if the sequence contains no elements.

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

返回序列中满足条件的第一个元素;如果未找到这样的元素,则返回默认值。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>)

根据指定的键选择器函数对序列中的元素进行分组。Groups the elements of a sequence according to a specified key selector function.

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

根据指定的键选择器函数对序列中的元素进行分组,并使用指定的比较器对键进行比较。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>)

根据指定的键选择器函数对序列中的元素进行分组,并且通过使用指定的函数对每个组中的元素进行投影。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>)

根据键选择器函数对序列中的元素进行分组。Groups the elements of a sequence according to a key selector function. 通过使用比较器对键进行比较,并且通过使用指定的函数对每个组的元素进行投影。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>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。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>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 通过使用指定的比较器对键进行比较。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>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 通过使用指定的函数对每个组的元素进行投影。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>)

根据指定的键选择器函数对序列中的元素进行分组,并且从每个组及其键中创建结果值。Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. 通过使用指定的比较器对键值进行比较,并且通过使用指定的函数对每个组的元素进行投影。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>)

基于键值等同性对两个序列的元素进行关联,并对结果进行分组。Correlates the elements of two sequences based on equality of keys and groups the results. 使用默认的相等比较器对键进行比较。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>)

基于键值等同性对两个序列的元素进行关联,并对结果进行分组。Correlates the elements of two sequences based on key equality and groups the results. 使用指定的 IEqualityComparer<T> 对键进行比较。A specified IEqualityComparer<T> is used to compare keys.

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

通过使用默认的相等比较器对值进行比较,生成两个序列的交集。Produces the set intersection of two sequences by using the default equality comparer to compare values.

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

通过使用指定的 IEqualityComparer<T> 对值进行比较,生成两个序列的交集。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>)

基于匹配键对两个序列的元素进行关联。Correlates the elements of two sequences based on matching keys. 使用默认的相等比较器对键进行比较。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>)

基于匹配键对两个序列的元素进行关联。Correlates the elements of two sequences based on matching keys. 使用指定的 IEqualityComparer<T> 对键进行比较。A specified IEqualityComparer<T> is used to compare keys.

Last<TSource>(IEnumerable<TSource>)

返回序列的最后一个元素。Returns the last element of a sequence.

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

返回序列中满足指定条件的最后一个元素。Returns the last element of a sequence that satisfies a specified condition.

LastOrDefault<TSource>(IEnumerable<TSource>)

返回序列中的最后一个元素;如果序列中不包含任何元素,则返回默认值。Returns the last element of a sequence, or a default value if the sequence contains no elements.

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

返回序列中满足条件的最后一个元素;如果未找到这样的元素,则返回默认值。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>)

返回表示序列中元素总数的 Int64Returns an Int64 that represents the total number of elements in a sequence.

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

返回表示序列中满足条件的元素的数量的 Int64Returns an Int64 that represents how many elements in a sequence satisfy a condition.

Max<TSource>(IEnumerable<TSource>)

返回泛型序列中的最大值。Returns the maximum value in a generic sequence.

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

对序列中的每个元素调用转换函数,并返回最大的 Decimal 值。Invokes a transform function on each element of a sequence and returns the maximum Decimal value.

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

对序列中的每个元素调用转换函数,并返回最大的 Double 值。Invokes a transform function on each element of a sequence and returns the maximum Double value.

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

对序列中的每个元素调用转换函数,并返回最大的 Int32 值。Invokes a transform function on each element of a sequence and returns the maximum Int32 value.

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

对序列中的每个元素调用转换函数,并返回最大的 Int64 值。Invokes a transform function on each element of a sequence and returns the maximum Int64 value.

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

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Decimal 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Double 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Int32 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Int64 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最大的 Single 值。Invokes a transform function on each element of a sequence and returns the maximum nullable Single value.

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

对序列中的每个元素调用转换函数,并返回最大的 Single 值。Invokes a transform function on each element of a sequence and returns the maximum Single value.

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

对序列中的每个元素调用转换函数,并返回最大结果值。Invokes a transform function on each element of a generic sequence and returns the maximum resulting value.

Min<TSource>(IEnumerable<TSource>)

返回泛型序列中的最小值。Returns the minimum value in a generic sequence.

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

对序列中的每个元素调用转换函数,并返回最小的 Decimal 值。Invokes a transform function on each element of a sequence and returns the minimum Decimal value.

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

对序列中的每个元素调用转换函数,并返回最小的 Double 值。Invokes a transform function on each element of a sequence and returns the minimum Double value.

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

对序列中的每个元素调用转换函数,并返回最小的 Int32 值。Invokes a transform function on each element of a sequence and returns the minimum Int32 value.

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

对序列中的每个元素调用转换函数,并返回最小的 Int64 值。Invokes a transform function on each element of a sequence and returns the minimum Int64 value.

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

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Decimal 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Double 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Int32 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Int64 值。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>>)

对序列中的每个元素调用转换函数,并返回可以为 null 的最小的 Single 值。Invokes a transform function on each element of a sequence and returns the minimum nullable Single value.

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

对序列中的每个元素调用转换函数,并返回最小的 Single 值。Invokes a transform function on each element of a sequence and returns the minimum Single value.

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

对序列中的每个元素调用转换函数,并返回最小结果值。Invokes a transform function on each element of a generic sequence and returns the minimum resulting value.

OfType<TResult>(IEnumerable)

根据指定类型筛选 IEnumerable 的元素。Filters the elements of an IEnumerable based on a specified type.

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

根据键按升序对序列的元素进行排序。Sorts the elements of a sequence in ascending order according to a key.

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

使用指定的比较器按升序对序列的元素进行排序。Sorts the elements of a sequence in ascending order by using a specified comparer.

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

根据键按降序对序列的元素进行排序。Sorts the elements of a sequence in descending order according to a key.

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

使用指定的比较器按降序对序列的元素排序。Sorts the elements of a sequence in descending order by using a specified comparer.

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

向序列的开头添加值。Adds a value to the beginning of the sequence.

Reverse<TSource>(IEnumerable<TSource>)

反转序列中元素的顺序。Inverts the order of the elements in a sequence.

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

将序列中的每个元素投影到新表单。Projects each element of a sequence into a new form.

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

通过合并元素的索引,将序列的每个元素投影到新窗体中。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>>)

将序列的每个元素投影到 IEnumerable<T> 并将结果序列合并为一个序列。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>>)

将序列的每个元素投影到 IEnumerable<T> 并将结果序列合并为一个序列。Projects each element of a sequence to an IEnumerable<T>, and flattens the resulting sequences into one sequence. 每个源元素的索引用于该元素的投影表。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>)

将序列的每个元素投影到 IEnumerable<T>,并将结果序列合并为一个序列,并对其中每个元素调用结果选择器函数。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>)

将序列的每个元素投影到 IEnumerable<T>,并将结果序列合并为一个序列,并对其中每个元素调用结果选择器函数。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. 每个源元素的索引用于该元素的中间投影表。The index of each source element is used in the intermediate projected form of that element.

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

通过使用相应类型的默认相等比较器对序列的元素进行比较,以确定两个序列是否相等。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>)

通过使用指定的 IEqualityComparer<T> 来比较两个序列的元素,以确定这两个序列是否相等。Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>.

Single<TSource>(IEnumerable<TSource>)

返回序列的唯一元素;如果该序列并非恰好包含一个元素,则会引发异常。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>)

返回序列中满足指定条件的唯一元素;如果有多个这样的元素存在,则会引发异常。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>)

返回序列中的唯一元素;如果该序列为空,则返回默认值;如果该序列包含多个元素,此方法将引发异常。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>)

返回序列中满足指定条件的唯一元素;如果这类元素不存在,则返回默认值;如果有多个元素满足该条件,此方法将引发异常。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)

跳过序列中指定数量的元素,然后返回剩余的元素。Bypasses a specified number of elements in a sequence and then returns the remaining elements.

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

返回一个新的可枚举集合,它包含 source 中的元素,但省略了源集合中的 count 个元素。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>)

如果指定的条件为 true,则跳过序列中的元素,然后返回剩余的元素。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>)

如果指定的条件为 true,则跳过序列中的元素,然后返回剩余的元素。Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. 将在谓词函数的逻辑中使用元素的索引。The element's index is used in the logic of the predicate function.

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

计算 Decimal 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。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>)

计算 Double 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。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>)

计算 Int32 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。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>)

计算 Int64 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Decimal 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Double 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Int32 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Int64 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。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>>)

计算可以为 null 的 Single 值序列的总和,这些值可通过对输入序列的每个元素调用转换函数获得。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>)

计算 Single 值序列的总和,这些值可通过对输入序列中的每个元素调用转换函数获得。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)

从序列的开头返回指定数量的相邻元素。Returns a specified number of contiguous elements from the start of a sequence.

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

返回一个新的可枚举集合,它包含 count 中的最后 source 个元素。Returns a new enumerable collection that contains the last count elements from source.

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

只要指定的条件为 true,就会返回序列的元素。Returns elements from a sequence as long as a specified condition is true.

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

只要指定的条件为 true,就会返回序列的元素。Returns elements from a sequence as long as a specified condition is true. 将在谓词函数的逻辑中使用元素的索引。The element's index is used in the logic of the predicate function.

ToArray<TSource>(IEnumerable<TSource>)

IEnumerable<T> 中创建数组。Creates an array from a IEnumerable<T>.

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

根据指定的键选择器函数,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>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>)

根据指定的键选择器函数和键比较器,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>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>)

根据指定的键选择器和元素选择器函数,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>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>)

根据指定的键选择器函数、比较器和元素选择器函数,从 IEnumerable<T> 创建一个 Dictionary<TKey,TValue>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> 创建一个 HashSet<T>Creates a HashSet<T> from an IEnumerable<T>.

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

使用 comparer 通过 IEnumerable<T> 创建 HashSet<T>,以用于比较键。Creates a HashSet<T> from an IEnumerable<T> using the comparer to compare keys.

ToList<TSource>(IEnumerable<TSource>)

IEnumerable<T> 创建一个 List<T>Creates a List<T> from an IEnumerable<T>.

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

根据指定的键选择器函数,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>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>)

根据指定的键选择器函数和键比较器,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>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>)

根据指定的键选择器和元素选择器函数,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>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>)

根据指定的键选择器函数、比较器和元素选择器函数,从 IEnumerable<T> 创建一个 Lookup<TKey,TElement>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>)

通过使用默认的相等比较器,生成两个序列的并集。Produces the set union of two sequences by using the default equality comparer.

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

通过使用指定的 IEqualityComparer<T> 生成两个序列的并集。Produces the set union of two sequences by using a specified IEqualityComparer<T>.

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

基于谓词筛选值序列。Filters a sequence of values based on a predicate.

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

基于谓词筛选值序列。Filters a sequence of values based on a predicate. 将在谓词函数的逻辑中使用每个元素的索引。Each element's index is used in the logic of the predicate function.

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

使用两个指定序列中的元素生成元组序列。Produces a sequence of tuples with elements from the two specified sequences.

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

将指定函数应用于两个序列的对应元素,以生成结果序列。Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results.

AsParallel(IEnumerable)

启用查询的并行化。Enables parallelization of a query.

AsParallel<TSource>(IEnumerable<TSource>)

启用查询的并行化。Enables parallelization of a query.

AsQueryable(IEnumerable)

IEnumerable 转换为 IQueryableConverts an IEnumerable to an IQueryable.

AsQueryable<TElement>(IEnumerable<TElement>)

将泛型 IEnumerable<T> 转换为泛型 IQueryable<T>Converts a generic IEnumerable<T> to a generic IQueryable<T>.

Ancestors<T>(IEnumerable<T>)

返回元素集合,其中包含源集合中每个节点的上级。Returns a collection of elements that contains the ancestors of every node in the source collection.

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

返回经过筛选的元素集合,其中包含源集合中每个节点的上级。Returns a filtered collection of elements that contains the ancestors of every node in the source collection. 集合中仅包括具有匹配 XName 的元素。Only elements that have a matching XName are included in the collection.

DescendantNodes<T>(IEnumerable<T>)

返回源集合中每个文档和元素的子代节点的集合。Returns a collection of the descendant nodes of every document and element in the source collection.

Descendants<T>(IEnumerable<T>)

返回元素集合,其中包含源集合中每个元素和文档的子代元素。Returns a collection of elements that contains the descendant elements of every element and document in the source collection.

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

返回经过筛选的元素集合,其中包含源集合中每个元素和文档的子代元素。Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. 集合中仅包括具有匹配 XName 的元素。Only elements that have a matching XName are included in the collection.

Elements<T>(IEnumerable<T>)

返回源集合中每个元素和文档的子元素的集合。Returns a collection of the child elements of every element and document in the source collection.

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

返回源集合中经过筛选的每个元素和文档的子元素集合。Returns a filtered collection of the child elements of every element and document in the source collection. 集合中仅包括具有匹配 XName 的元素。Only elements that have a matching XName are included in the collection.

InDocumentOrder<T>(IEnumerable<T>)

返回节点集合(其中包含源集合中的所有节点),并按文档顺序排列。Returns a collection of nodes that contains all nodes in the source collection, sorted in document order.

Nodes<T>(IEnumerable<T>)

返回源集合中每个文档和元素的子节点集合。Returns a collection of the child nodes of every document and element in the source collection.

Remove<T>(IEnumerable<T>)

将源集合中的每个节点从其父节点中移除。Removes every node in the source collection from its parent node.

适用于

线程安全性

此接口的所有实现都必须使此接口的所有成员能够同时从多个线程使用。All implementations of this interface must enable all members of this interface to be used concurrently from multiple threads.

另请参阅