ArraySegment<T> 建構函式

定義

命名空間:

System

組件:

netstandard.dll, System.Runtime.dll

初始化結構的新實例 ArraySegment<T> 。

多載

名稱	Description
ArraySegment<T>(T[])	初始化一個新的結構實例 ArraySegment<T> ，該結構會界定指定陣列中的所有元素。
ArraySegment<T>(T[], Int32, Int32)	初始化一個新的結構實例 ArraySegment<T> ，界定指定陣列中元素的範圍。

範例

以下程式碼範例將結構傳遞 ArraySegment<T> 給一個方法。

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

*/

open System

// Print functions.
let printIndexAndValues (myArr: string []) =
    for i = 0 to myArr.Length - 1 do
        printfn $"   [{i}] : {myArr[i]}"
    printfn ""

let printIndexAndValuesSeg (arrSeg: ArraySegment<string>) =
    for i = arrSeg.Offset to arrSeg.Offset + arrSeg.Count - 1 do
        printfn $"   [{i}] : {arrSeg.Array[i]}"
    printfn ""

// Create and initialize a new string array.
let myArr = [| "The"; "quick"; "brown"; "fox"; "jumps"; "over"; "the"; "lazy"; "dog" |]

// Display the initial contents of the array.
printfn "The original array initially contains:"
printIndexAndValues myArr

// Define an array segment that contains the entire array.
let myArrSegAll = ArraySegment<string>(myArr)

// Display the contents of the ArraySegment.
printfn "The first array segment (with all the array's elements) contains:"
printIndexAndValuesSeg myArrSegAll

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

// Display the contents of the ArraySegment.
printfn "The second array segment (with the middle five elements) contains:"
printIndexAndValuesSeg 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.
printfn "After the first array segment is modified, the second array segment now contains:"
printIndexAndValuesSeg myArrSegMid


(*
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

*)

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

    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

    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

End Class


'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

ArraySegment<T>(T[])

來源:

ArraySegment.cs

初始化一個新的結構實例 ArraySegment<T> ，該結構會界定指定陣列中的所有元素。

public:
 ArraySegment(cli::array <T> ^ array);

public ArraySegment(T[] array);

new ArraySegment<'T> : 'T[] -> ArraySegment<'T>

Public Sub New (array As T())

參數

array

T[]

陣列要包裹。

例外狀況

ArgumentNullException

array 為 null。

備註

此構造子創造了一個 ArraySegment<T> ，界定了所有元素 array。 也就是說， Offset 的 ArraySegment<T> 性質為 0，其 Count 性質為 的 array長度。 要建立只界定陣列部分的 ，ArraySegment<T>請使用建構子。ArraySegment<T>(T[], Int32, Int32)

原始陣列必須是一維的，且必須具有以零為基礎的索引。

多個 ArraySegment<T> 實例可以指向同一個原始陣列，且可能重疊。

另請參閱

• Array

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

來源:

ArraySegment.cs

初始化一個新的結構實例 ArraySegment<T> ，界定指定陣列中元素的範圍。

public:
 ArraySegment(cli::array <T> ^ array, int offset, int count);

public ArraySegment(T[] array, int offset, int count);

new ArraySegment<'T> : 'T[] * int * int -> ArraySegment<'T>

Public Sub New (array As T(), offset As Integer, count As Integer)

參數

array

T[]

包含要分隔的元素範圍的陣列。

offset

Int32

該區間中第一個元素的零基指數。

count

Int32

範圍中的元素數量。

例外狀況

ArgumentNullException

array 為 null。

ArgumentOutOfRangeException

offset 或 count 小於0。

ArgumentException

offset且count不指定有效範圍。array

備註

原始陣列必須是一維的，且必須具有以零為基礎的索引。

多個 ArraySegment<T> 實例可以指向同一個原始陣列，且可能重疊。

另請參閱

• Array