ArraySegment<T> ArraySegment<T> ArraySegment<T> ArraySegment<T> Struct

定义

分隔一维数组的一部分。Delimits a section of a one-dimensional array.

generic <typename T>
public value class ArraySegment : System::Collections::Generic::ICollection<T>, System::Collections::Generic::IEnumerable<T>, System::Collections::Generic::IList<T>, System::Collections::Generic::IReadOnlyCollection<T>, System::Collections::Generic::IReadOnlyList<T>
[System.Serializable]
public struct ArraySegment<T> : System.Collections.Generic.ICollection<T>, System.Collections.Generic.IEnumerable<T>, System.Collections.Generic.IList<T>, System.Collections.Generic.IReadOnlyCollection<T>, System.Collections.Generic.IReadOnlyList<T>
type ArraySegment<'T> = struct
    interface IList<'T>
    interface IReadOnlyList<'T>
    interface ICollection<'T>
    interface seq<'T>
    interface IEnumerable
    interface IReadOnlyCollection<'T>
Public Structure ArraySegment(Of T)
Implements ICollection(Of T), IEnumerable(Of T), IList(Of T), IReadOnlyCollection(Of T), IReadOnlyList(Of T)

类型参数

T

数组段中元素的类型。The type of the elements in the array segment.

继承
ArraySegment<T>ArraySegment<T>ArraySegment<T>ArraySegment<T>
属性
实现

示例

下面的代码示例传递ArraySegment<T>结构的方法。The following code example passes an ArraySegment<T> structure to a method.

using namespace System;


namespace Sample
{
    public ref class SampleArray  
    {
    public:
        static void Work()  
        {

            // Create and initialize a new string array.
            array <String^>^ words = {"The", "quick", "brown",
                "fox", "jumps", "over", "the", "lazy", "dog"};

            // Display the initial contents of the array.
            Console::WriteLine("The first array segment"
		        " (with all the array's elements) contains:");
            PrintIndexAndValues(words);

            // Define an array segment that contains the entire array.
            ArraySegment<String^> segment(words);
			
            // Display the contents of the ArraySegment.
            Console::WriteLine("The first array segment"
                " (with all the array's elements) contains:");
            PrintIndexAndValues(segment);

            // Define an array segment that contains the middle five 
            // values of the array.
            ArraySegment<String^> middle(words, 2, 5);
            
            // Display the contents of the ArraySegment.
            Console::WriteLine("The second array segment"
                " (with the middle five elements) contains:");
            PrintIndexAndValues(middle);

            // Modify the fourth element of the first array 
            // segment
            segment.Array[3] = "LION";

            // Display the contents of the second array segment 
            // middle. Note that the value of its second element 
            // also changed.
            Console::WriteLine("After the first array segment"
                " is modified,the second array segment"
                " now contains:");
            PrintIndexAndValues(middle);
            Console::ReadLine();
        }

        static void PrintIndexAndValues(ArraySegment<String^>^ segment)  
        {
            for (int i = segment->Offset; 
                i < (segment->Offset + segment->Count); i++)  
            {
                Console::WriteLine("   [{0}] : {1}", i,
                    segment->Array[i]);
            }
            Console::WriteLine();
        }

        static void PrintIndexAndValues(array<String^>^ words) 
        {
            for (int i = 0; i < words->Length; i++)  
            {
                Console::WriteLine("   [{0}] : {1}", i,
                    words[i]);
            }
            Console::WriteLine();
        }
    };
}

int main()
{
    Sample::SampleArray::Work();
    return 0; 
}


    /* 
    This code produces the following output.

    The original array initially contains:
    [0] : The
    [1] : quick
    [2] : brown
    [3] : fox
    [4] : jumps
    [5] : over
    [6] : the
    [7] : lazy
    [8] : dog

    The first array segment (with all the array's elements) contains:
    [0] : The
    [1] : quick
    [2] : brown
    [3] : fox
    [4] : jumps
    [5] : over
    [6] : the
    [7] : lazy
    [8] : dog

    The second array segment (with the middle five elements) contains:
    [2] : brown
    [3] : fox
    [4] : jumps
    [5] : over
    [6] : the

    After the first array segment is modified, the second array segment now contains:
    [2] : brown
    [3] : LION
    [4] : jumps
    [5] : over
    [6] : the

    */

using System;

public class SamplesArray  {
 
   public static void Main()  {
 
      // Create and initialize a new string array.
      String[] myArr = { "The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog" };
 
      // Display the initial contents of the array.
      Console.WriteLine( "The original array initially contains:" );
      PrintIndexAndValues( myArr );

      // Define an array segment that contains the entire array.
      ArraySegment<String> myArrSegAll = new ArraySegment<String>( myArr );

      // Display the contents of the ArraySegment.
      Console.WriteLine( "The first array segment (with all the array's elements) contains:" );
      PrintIndexAndValues( myArrSegAll );

      // Define an array segment that contains the middle five values of the array.
      ArraySegment<String> myArrSegMid = new ArraySegment<String>( myArr, 2, 5 );

      // Display the contents of the ArraySegment.
      Console.WriteLine( "The second array segment (with the middle five elements) contains:" );
      PrintIndexAndValues( myArrSegMid );

      // Modify the fourth element of the first array segment myArrSegAll.
      myArrSegAll.Array[3] = "LION";

      // Display the contents of the second array segment myArrSegMid.
      // Note that the value of its second element also changed.
      Console.WriteLine( "After the first array segment is modified, the second array segment now contains:" );
      PrintIndexAndValues( myArrSegMid );

   }
 
   public static void PrintIndexAndValues( ArraySegment<String> arrSeg )  {
      for ( int i = arrSeg.Offset; i < (arrSeg.Offset + arrSeg.Count); i++ )  {
         Console.WriteLine( "   [{0}] : {1}", i, arrSeg.Array[i] );
      }
      Console.WriteLine();
   }

   public static void PrintIndexAndValues( String[] myArr )  {
      for ( int i = 0; i < myArr.Length; i++ )  {
         Console.WriteLine( "   [{0}] : {1}", i, myArr[i] );
      }
      Console.WriteLine();
   }

}


/* 
This code produces the following output.

The original array initially contains:
   [0] : The
   [1] : quick
   [2] : brown
   [3] : fox
   [4] : jumps
   [5] : over
   [6] : the
   [7] : lazy
   [8] : dog

The first array segment (with all the array's elements) contains:
   [0] : The
   [1] : quick
   [2] : brown
   [3] : fox
   [4] : jumps
   [5] : over
   [6] : the
   [7] : lazy
   [8] : dog

The second array segment (with the middle five elements) contains:
   [2] : brown
   [3] : fox
   [4] : jumps
   [5] : over
   [6] : the

After the first array segment is modified, the second array segment now contains:
   [2] : brown
   [3] : LION
   [4] : jumps
   [5] : over
   [6] : the

*/

Imports System

Public Class SamplesArray

    Public Shared Sub Main()

        ' Create and initialize a new string array.
        Dim myArr As String() =  {"The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"}

        ' Display the initial contents of the array.
        Console.WriteLine("The original array initially contains:")
        PrintIndexAndValues(myArr)

        ' Define an array segment that contains the entire array.
        Dim myArrSegAll As New ArraySegment(Of String)(myArr)

        ' Display the contents of the ArraySegment.
        Console.WriteLine("The first array segment (with all the array's elements) contains:")
        PrintIndexAndValues(myArrSegAll)

        ' Define an array segment that contains the middle five values of the array.
        Dim myArrSegMid As New ArraySegment(Of String)(myArr, 2, 5)

        ' Display the contents of the ArraySegment.
        Console.WriteLine("The second array segment (with the middle five elements) contains:")
        PrintIndexAndValues(myArrSegMid)

        ' Modify the fourth element of the first array segment myArrSegAll.
        myArrSegAll.Array(3) = "LION"

        ' Display the contents of the second array segment myArrSegMid.
        ' Note that the value of its second element also changed.
        Console.WriteLine("After the first array segment is modified, the second array segment now contains:")
        PrintIndexAndValues(myArrSegMid)

    End Sub 'Main

    Public Shared Sub PrintIndexAndValues(arrSeg As ArraySegment(Of String))
        Dim i As Integer
        For i = arrSeg.Offset To (arrSeg.Offset + arrSeg.Count - 1)
            Console.WriteLine("   [{0}] : {1}", i, arrSeg.Array(i))
        Next i
        Console.WriteLine()
    End Sub 'PrintIndexAndValues 

    Public Shared Sub PrintIndexAndValues(myArr as String())
        Dim i As Integer
        For i = 0 To (myArr.Length - 1)
            Console.WriteLine("   [{0}] : {1}", i, myArr(i))
        Next i
        Console.WriteLine()
    End Sub 'PrintIndexAndValues 

End Class 'SamplesArray


'This code produces the following output.
'
'The original array initially contains:
'   [0] : The
'   [1] : quick
'   [2] : brown
'   [3] : fox
'   [4] : jumps
'   [5] : over
'   [6] : the
'   [7] : lazy
'   [8] : dog
'
'The first array segment (with all the array's elements) contains:
'   [0] : The
'   [1] : quick
'   [2] : brown
'   [3] : fox
'   [4] : jumps
'   [5] : over
'   [6] : the
'   [7] : lazy
'   [8] : dog
'
'The second array segment (with the middle five elements) contains:
'   [2] : brown
'   [3] : fox
'   [4] : jumps
'   [5] : over
'   [6] : the
'
'After the first array segment is modified, the second array segment now contains:
'   [2] : brown
'   [3] : LION
'   [4] : jumps
'   [5] : over
'   [6] : the

注解

ArraySegment<T> 是一个数组,其中分隔的一系列该数组中元素周围的包装器。ArraySegment<T> is a wrapper around an array that delimits a range of elements in that array. 多个ArraySegment<T>实例可以引用同一个原始数组和可以重叠。Multiple ArraySegment<T> instances can refer to the same original array and can overlap. 原始数组必须是一维,并且必须具有从零开始的索引。The original array must be one-dimensional and must have zero-based indexing.

备注

ArraySegment<T> 实现IReadOnlyCollection<T>开头的接口.NET Framework 4.6.NET Framework 4.6; 在以前版本的.NET Framework 中,ArraySegment<T>结构未实现此接口。ArraySegment<T> implements the IReadOnlyCollection<T> interface starting with the .NET Framework 4.6.NET Framework 4.6; in previous versions of the .NET Framework, the ArraySegment<T> structure did not implement this interface.

ArraySegment<T>结构非常有用,只要将非重复的段中操作数组的元素。The ArraySegment<T> structure is useful whenever the elements of an array will be manipulated in distinct segments. 例如:For example:

  • 可以将传递ArraySegment<T>对象,表示只有部分数组作为参数的方法,而不是代价相对较大方法的调用Copy传递数组的一部分的副本。You can pass an ArraySegment<T> object that represents only a portion of an array as an argument to a method, rather than call a relatively expensive method like Copy to pass a copy of a portion of an array.

  • 在多线程应用中,可以使用ArraySegment<T>结构,让它对只有部分数组的每个线程。In a multithreaded app, you can use the ArraySegment<T> structure to have each thread operate on only a portion of the array.

  • 对于基于任务的异步操作,可以使用ArraySegment<T>对象,以确保每个任务作用于数组的不同段。For task-based asynchronous operations, you can use an ArraySegment<T> object to ensure that each task operates on a distinct segment of the array. 下面的示例将划分为各个段具有最多十个元素的数组。The following example divides an array into individual segments with up to ten elements. 在段中的每个元素乘以其段数量。Each element in the segment is multiplied by its segment number. 结果显示,使用ArraySegment<T>类来处理这种方式中的元素会更改其基础数组值。The result shows that using the ArraySegment<T> class to manipulate elements in this way changes the values of its underlying array.

    using System;
    using System.Collections.Generic;
    using System.Threading.Tasks;
    
    public class Example
    {
       private const int segmentSize = 10;
       
       public static async Task Main()
       {
          List<Task> tasks = new List<Task>();
    
          // Create array.
          int[] arr = new int[50];
          for (int ctr = 0; ctr <= arr.GetUpperBound(0); ctr++)
             arr[ctr] = ctr + 1;
    
          // Handle array in segments of 10.
          for (int ctr = 1; ctr <= Math.Ceiling(((double)arr.Length)/segmentSize); ctr++) {
             int multiplier = ctr;
             int elements = (multiplier - 1) * 10 + segmentSize > arr.Length ?
                             arr.Length - (multiplier - 1) * 10 : segmentSize;
             ArraySegment<int> segment = new ArraySegment<int>(arr, (ctr - 1) * 10, elements);
             tasks.Add(Task.Run( () => { IList<int> list = (IList<int>) segment;
                                         for (int index = 0; index < list.Count; index++)
                                            list[index] = list[index] * multiplier;
                                       } ));
          }
          try {
             await Task.WhenAll(tasks.ToArray());
             int elementsShown = 0;
             foreach (var value in arr) {
                Console.Write("{0,3} ", value);
                elementsShown++;
                if (elementsShown % 18 == 0)
                   Console.WriteLine();
             }
          }
          catch (AggregateException e) {
             Console.WriteLine("Errors occurred when working with the array:");
             foreach (var inner in e.InnerExceptions)
                Console.WriteLine("{0}: {1}", inner.GetType().Name, inner.Message);
          }
       }
    }
    // The example displays the following output:
    //      1   2   3   4   5   6   7   8   9  10  22  24  26  28  30  32  34  36
    //     38  40  63  66  69  72  75  78  81  84  87  90 124 128 132 136 140 144
    //    148 152 156 160 205 210 215 220 225 230 235 240 245 250
    
    Imports System.Collections.Generic
    Imports System.Threading.Tasks
    
    Module Example
      Private Const SegmentSize As Integer = 10
      
       Public Sub Main()
          Dim tasks As New List(Of Task)
          
           ' Create array.
          Dim arr(49) As Integer
          For ctr As Integer = 0 To arr.GetUpperBound(0)
             arr(ctr) = ctr + 1
          Next
    
          ' Handle array in segments of 10.
          For ctr As Integer = 1 To CInt(Math.Ceiling(arr.Length / segmentSize))
             Dim multiplier As Integer = ctr
             Dim elements As Integer = If((multiplier - 1) * 10 + segmentSize > arr.Length,
                                          arr.Length - (multiplier - 1) * 10,
                                          segmentSize)
             Dim segment As New ArraySegment(Of Integer)(arr, (ctr - 1) * 10, elements)
             tasks.Add(Task.Run( Sub()
                                    Dim list As IList(Of Integer) = CType(segment, IList(Of Integer))
                                    For index As Integer = 0 To list.Count - 1
                                       list(index) = list(index) * multiplier
                                    Next
                                 End Sub ))
          Next
          Try
             Task.WaitAll(tasks.ToArray())
             Dim elementsShown As Integer = 0
             For Each value In arr
                Console.Write("{0,3} ", value)
                elementsShown += 1
                If elementsShown Mod 18 = 0 Then Console.WriteLine()
             Next
          Catch e As AggregateException
             Console.WriteLine("Errors occurred when working with the array:")
             For Each inner As Exception In e.InnerExceptions
                Console.WriteLine("{0}: {1}", inner.GetType().Name, inner.Message)
             Next
          End Try
       End Sub
    End Module
    ' The example displays the following output:
    '         1   2   3   4   5   6   7   8   9  10  22  24  26  28  30  32  34  36
    '        38  40  63  66  69  72  75  78  81  84  87  90 124 128 132 136 140 144
    '       148 152 156 160 205 210 215 220 225 230 235 240 245 250
    

但请注意,尽管ArraySegment<T>结构可用于将数组划分为不同的段、 的段不是完全独立于另一个。Note, however, that although the ArraySegment<T> structure can be used to divide an array into distinct segments, the segments are not completely independent of one another. Array属性返回整个原始数组不是数组的副本; 因此,对所做更改返回的数组Array属性对原始数组。The Array property returns the entire original array, not a copy of the array; therefore, changes made to the array returned by the Array property are made to the original array. 如果这是不可取,您应执行副本操作的数组,而不是ArraySegment<T>对象,表示数组的一部分。If this is undesirable, you should perform operations on a copy of the array, rather than an ArraySegment<T> object that represents a portion of the array.

Equals引用相等性时它们比较两个测试方法和相等和不相等运算符ArraySegment<T>对象。The Equals method and the equality and inequality operators test for reference equality when they compare two ArraySegment<T> objects. 两个ArraySegment<T>对象被视为相等,它们必须满足所有以下条件:For two ArraySegment<T> objects to be considered equal, they must meet all of the following conditions:

  • 引用相同的数组。Reference the same array.

  • 在数组中的相同索引处开始。Begin at the same index in the array.

  • 具有相同数量的元素。Have the same number of elements.

如果你想要检索其索引的元素ArraySegment<T>对象,您必须将其转换为IList<T>对象并对其进行检索或修改它通过使用IList<T>.Item[Int32]属性。If you want to retrieve an element by its index in the ArraySegment<T> object, you must cast it to an IList<T> object and retrieve it or modify it by using the IList<T>.Item[Int32] property. 下面的示例检索中的元素ArraySegment<T>分隔的字符串数组的一部分的对象。The following example retrieves the element in an ArraySegment<T> object that delimits a section of a string array.

using System;
using System.Collections.Generic;

public class Example
{
   public static void Main()
   {
      String[] names = { "Adam", "Bruce", "Charles", "Daniel", 
                         "Ebenezer", "Francis", "Gilbert", 
                         "Henry", "Irving", "John", "Karl",
                         "Lucian", "Michael" };
      var partNames = new ArraySegment<String>(names, 2, 5);
      
      // Cast the ArraySegment object to an IList<String> and enumerate it.
      var list = (IList<String>) partNames;
      for (int ctr = 0; ctr <= list.Count - 1; ctr++)
         Console.WriteLine(list[ctr]);
   }
}
// The example displays the following output:
//    Charles
//    Daniel
//    Ebenezer
//    Francis
//    Gilbert
Imports System.Collections.Generic

Module Example
   Public Sub Main()
      Dim names() As String = { "Adam", "Bruce", "Charles", "Daniel", 
                                "Ebenezer", "Francis", "Gilbert", 
                                "Henry", "Irving", "John", "Karl",
                                "Lucian", "Michael" }
      Dim partNames As New ArraySegment(Of String)(names, 2, 5)
      
      ' Cast the ArraySegment object to an IList<String> and enumerate it.
      Dim list = CType(partNames, IList(Of String))
      For ctr As Integer = 0 To list.Count - 1
         Console.WriteLine(list(ctr))
      Next     
   End Sub
End Module
' The example displays the following output:
'    Charles
'    Daniel
'    Ebenezer
'    Francis
'    Gilbert

构造函数

ArraySegment<T>(T[]) ArraySegment<T>(T[]) ArraySegment<T>(T[]) ArraySegment<T>(T[])

初始化 ArraySegment<T> 结构的新实例,该结构用于分隔指定数组中的所有元素。Initializes a new instance of the ArraySegment<T> structure that delimits all the elements in the specified array.

ArraySegment<T>(T[], Int32, Int32) ArraySegment<T>(T[], Int32, Int32) ArraySegment<T>(T[], Int32, Int32) ArraySegment<T>(T[], Int32, Int32)

初始化 ArraySegment<T> 结构的新结构,该结构用于分隔指定数组中指定的元素范围。Initializes a new instance of the ArraySegment<T> structure that delimits the specified range of the elements in the specified array.

属性

Array Array Array Array

获取原始数组,其中包含数组段分隔的元素范围。Gets the original array containing the range of elements that the array segment delimits.

Count Count Count Count

获取由数组段分隔的范围中的元素个数。Gets the number of elements in the range delimited by the array segment.

Empty Empty Empty Empty
Item[Int32] Item[Int32] Item[Int32] Item[Int32]
Offset Offset Offset Offset

获取由数组段分隔的范围中的第一个元素的位置(相对于原始数组的开始位置)。Gets the position of the first element in the range delimited by the array segment, relative to the start of the original array.

方法

CopyTo(ArraySegment<T>) CopyTo(ArraySegment<T>) CopyTo(ArraySegment<T>) CopyTo(ArraySegment<T>)
CopyTo(T[]) CopyTo(T[]) CopyTo(T[]) CopyTo(T[])
CopyTo(T[], Int32) CopyTo(T[], Int32) CopyTo(T[], Int32) CopyTo(T[], Int32)
Equals(ArraySegment<T>) Equals(ArraySegment<T>) Equals(ArraySegment<T>) Equals(ArraySegment<T>)

确定指定的 ArraySegment<T> 结构是否等于当前实例。Determines whether the specified ArraySegment<T> structure is equal to the current instance.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

确定指定的对象是否等于当前实例。Determines whether the specified object is equal to the current instance.

GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

返回当前实例的哈希代码。Returns the hash code for the current instance.

Slice(Int32) Slice(Int32) Slice(Int32) Slice(Int32)
Slice(Int32, Int32) Slice(Int32, Int32) Slice(Int32, Int32) Slice(Int32, Int32)
ToArray() ToArray() ToArray() ToArray()

操作员

Equality(ArraySegment<T>, ArraySegment<T>) Equality(ArraySegment<T>, ArraySegment<T>) Equality(ArraySegment<T>, ArraySegment<T>) Equality(ArraySegment<T>, ArraySegment<T>)

指示两个 ArraySegment<T> 结构是否相等。Indicates whether two ArraySegment<T> structures are equal.

Implicit(T[] to ArraySegment<T>) Implicit(T[] to ArraySegment<T>) Implicit(T[] to ArraySegment<T>) Implicit(T[] to ArraySegment<T>)
Inequality(ArraySegment<T>, ArraySegment<T>) Inequality(ArraySegment<T>, ArraySegment<T>) Inequality(ArraySegment<T>, ArraySegment<T>) Inequality(ArraySegment<T>, ArraySegment<T>)

指示两个 ArraySegment<T> 结构是否不相等。Indicates whether two ArraySegment<T> structures are unequal.

显式界面实现

ICollection<T>.Add(T) ICollection<T>.Add(T) ICollection<T>.Add(T) ICollection<T>.Add(T)

向数组段添加一项。Adds an item to the array segment.

ICollection<T>.Clear() ICollection<T>.Clear() ICollection<T>.Clear() ICollection<T>.Clear()

从数组段中移除所有项。Removes all items from the array segment.

ICollection<T>.Contains(T) ICollection<T>.Contains(T) ICollection<T>.Contains(T) ICollection<T>.Contains(T)

确定数组段是否包含特定值。Determines whether the array segment contains a specific value.

ICollection<T>.CopyTo(T[], Int32) ICollection<T>.CopyTo(T[], Int32) ICollection<T>.CopyTo(T[], Int32) ICollection<T>.CopyTo(T[], Int32)

从指定的数组索引开始,将数组段的元素复制到一个数组中。Copies the elements of the array segment to an array, starting at the specified array index.

ICollection<T>.IsReadOnly ICollection<T>.IsReadOnly ICollection<T>.IsReadOnly ICollection<T>.IsReadOnly

获取一个值,该值指示该数组段是否为只读。Gets a value that indicates whether the array segment is read-only.

ICollection<T>.Remove(T) ICollection<T>.Remove(T) ICollection<T>.Remove(T) ICollection<T>.Remove(T)

从数组段中移除特定对象的第一个匹配项。Removes the first occurrence of a specific object from the array segment.

IEnumerable<T>.GetEnumerator() IEnumerable<T>.GetEnumerator() IEnumerable<T>.GetEnumerator() IEnumerable<T>.GetEnumerator()

返回循环访问数组段的枚举器。Returns an enumerator that iterates through the array segment.

IList<T>.IndexOf(T) IList<T>.IndexOf(T) IList<T>.IndexOf(T) IList<T>.IndexOf(T)

确定数组段中特定项的索引。Determines the index of a specific item in the array segment.

IList<T>.Insert(Int32, T) IList<T>.Insert(Int32, T) IList<T>.Insert(Int32, T) IList<T>.Insert(Int32, T)

将一个项插入数组段中的指定索引处。Inserts an item into the array segment at the specified index.

IList<T>.Item[Int32] IList<T>.Item[Int32] IList<T>.Item[Int32] IList<T>.Item[Int32]

获取或设置指定索引处的元素。Gets or sets the element at the specified index.

IList<T>.RemoveAt(Int32) IList<T>.RemoveAt(Int32) IList<T>.RemoveAt(Int32) IList<T>.RemoveAt(Int32)

移除指定索引处的数组段。Removes the array segment item at the specified index.

IReadOnlyList<T>.Item[Int32] IReadOnlyList<T>.Item[Int32] IReadOnlyList<T>.Item[Int32] IReadOnlyList<T>.Item[Int32]

获取数组段的指定索引处的元素。Gets the element at the specified index of the array segment.

IEnumerable.GetEnumerator() IEnumerable.GetEnumerator() IEnumerable.GetEnumerator() IEnumerable.GetEnumerator()

返回循环访问数组段的枚举器。Returns an enumerator that iterates through an array segment.

扩展方法

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

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

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

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

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

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

IEnumerable 转换为 IQueryableConverts an IEnumerable to an IQueryable.

AsMemory<T>(ArraySegment<T>) AsMemory<T>(ArraySegment<T>) AsMemory<T>(ArraySegment<T>) AsMemory<T>(ArraySegment<T>)

在目标数组段的一部分上创建新的内存区域。Creates a new memory region over the portion of the target array segment.

AsMemory<T>(ArraySegment<T>, Int32) AsMemory<T>(ArraySegment<T>, Int32) AsMemory<T>(ArraySegment<T>, Int32) AsMemory<T>(ArraySegment<T>, Int32)

从指定位置开始到段的结尾,在目标数组段的一部分上创建新的内存区域。Creates a new memory region over the portion of the target array segment starting at a specified position to the end of the segment.

AsMemory<T>(ArraySegment<T>, Int32, Int32) AsMemory<T>(ArraySegment<T>, Int32, Int32) AsMemory<T>(ArraySegment<T>, Int32, Int32) AsMemory<T>(ArraySegment<T>, Int32, Int32)

从具有指定长度的指定位置开始,在目标数组段的一部分上创建新的内存区域。Creates a new memory region over the portion of the target array segment beginning at a specified position with a specified length.

AsSpan<T>(ArraySegment<T>) AsSpan<T>(ArraySegment<T>) AsSpan<T>(ArraySegment<T>) AsSpan<T>(ArraySegment<T>)

在目标数组段上创建新的跨度。Creates a new span over a target array segment.

AsSpan<T>(ArraySegment<T>, Index) AsSpan<T>(ArraySegment<T>, Index) AsSpan<T>(ArraySegment<T>, Index) AsSpan<T>(ArraySegment<T>, Index)

在目标数组段的一部分上创建新的跨度,从指定的索引开始,以段的末尾结束。Creates a new span over a portion of the target array segment beginning at a specified index and ending at the end of the segment.

AsSpan<T>(ArraySegment<T>, Int32) AsSpan<T>(ArraySegment<T>, Int32) AsSpan<T>(ArraySegment<T>, Int32) AsSpan<T>(ArraySegment<T>, Int32)

从指定位置到段的结尾,在目标数组段的一部分上创建新的跨度。Creates a new span over a portion of a target array segment from a specified position to the end of the segment.

AsSpan<T>(ArraySegment<T>, Int32, Int32) AsSpan<T>(ArraySegment<T>, Int32, Int32) AsSpan<T>(ArraySegment<T>, Int32, Int32) AsSpan<T>(ArraySegment<T>, Int32, Int32)

从指定长度的指定位置在目标数组段的一部分上创建新的跨度。Creates a new span over a portion of a target array segment from a specified position for a specified length.

AsSpan<T>(ArraySegment<T>, Range) AsSpan<T>(ArraySegment<T>, Range) AsSpan<T>(ArraySegment<T>, Range) AsSpan<T>(ArraySegment<T>, Range)

使用范围起始和结束索引在目标数组段的一部分上创建新的跨度Creates a new span over a portion of a target array segment using the range start and end indexes

Ancestors<T>(IEnumerable<T>) Ancestors<T>(IEnumerable<T>) Ancestors<T>(IEnumerable<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) Ancestors<T>(IEnumerable<T>, XName) Ancestors<T>(IEnumerable<T>, XName) 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>) DescendantNodes<T>(IEnumerable<T>) DescendantNodes<T>(IEnumerable<T>) 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>) Descendants<T>(IEnumerable<T>) Descendants<T>(IEnumerable<T>) 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) Descendants<T>(IEnumerable<T>, XName) Descendants<T>(IEnumerable<T>, XName) 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>) Elements<T>(IEnumerable<T>) Elements<T>(IEnumerable<T>) 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) Elements<T>(IEnumerable<T>, XName) Elements<T>(IEnumerable<T>, XName) 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>) InDocumentOrder<T>(IEnumerable<T>) InDocumentOrder<T>(IEnumerable<T>) 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>) Nodes<T>(IEnumerable<T>) Nodes<T>(IEnumerable<T>) 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>) Remove<T>(IEnumerable<T>) Remove<T>(IEnumerable<T>) 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

另请参阅