Array.CopyTo Array.CopyTo Array.CopyTo Method

定义

将当前一维数组的所有元素复制到指定的一维数组中。Copies all the elements of the current one-dimensional array to the specified one-dimensional array.

重载

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

从指定的目标数组索引处开始,将当前一维数组的所有元素复制到指定的一维数组中。Copies all the elements of the current one-dimensional array to the specified one-dimensional array starting at the specified destination array index. 索引指定为 32 位整数。The index is specified as a 32-bit integer.

CopyTo(Array, Int64) CopyTo(Array, Int64) CopyTo(Array, Int64)

从指定的目标数组索引处开始,将当前一维数组的所有元素复制到指定的一维数组中。Copies all the elements of the current one-dimensional array to the specified one-dimensional array starting at the specified destination array index. 索引指定为 64 位整数。The index is specified as a 64-bit integer.

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

从指定的目标数组索引处开始,将当前一维数组的所有元素复制到指定的一维数组中。Copies all the elements of the current one-dimensional array to the specified one-dimensional array starting at the specified destination array index. 索引指定为 32 位整数。The index is specified as a 32-bit integer.

public:
 virtual void CopyTo(Array ^ array, int index);
public void CopyTo (Array array, int index);
abstract member CopyTo : Array * int -> unit
override this.CopyTo : Array * int -> unit

参数

array
Array Array Array

一维数组,它是从当前数组复制的元素的目标。The one-dimensional array that is the destination of the elements copied from the current array.

index
Int32 Int32 Int32

一个 32 位整数,它表示 array 中复制开始处的索引。A 32-bit integer that represents the index in array at which copying begins.

实现

异常

index 小于 array 的下限。index is less than the lower bound of array.

array 是多维的。array is multidimensional.

-or- 源数组中的元素数大于从 index 到目标 array 的末尾之间的可用元素数。The number of elements in the source array is greater than the available number of elements from index to the end of the destination array.

无法自动将源 Array 的类型转换为目标 array 的类型。The type of the source Array cannot be cast automatically to the type of the destination array.

源数组是多维数组。The source array is multidimensional.

Array 中至少有一个元素无法转换为目标 array 的类型。At least one element in the source Array cannot be cast to the type of destination array.

示例

下面的代码示例演示如何将复制Array到另Array一个。The following code example shows how to copy an Array to another Array.

using namespace System;
void main1();
void main2();
void main()
{
   main1();
   Console::WriteLine();
   main2();
}

void PrintValues( Array^ myArr );
void main1()
{
   // Creates and initializes two new Array instances.
   Array^ mySourceArray = Array::CreateInstance( String::typeid, 6 );
   mySourceArray->SetValue( "three", 0 );
   mySourceArray->SetValue( "napping", 1 );
   mySourceArray->SetValue( "cats", 2 );
   mySourceArray->SetValue( "in", 3 );
   mySourceArray->SetValue( "the", 4 );
   mySourceArray->SetValue( "barn", 5 );
   Array^ myTargetArray = Array::CreateInstance( String::typeid, 15 );
   myTargetArray->SetValue( "The", 0 );
   myTargetArray->SetValue( "quick", 1 );
   myTargetArray->SetValue( "brown", 2 );
   myTargetArray->SetValue( "fox", 3 );
   myTargetArray->SetValue( "jumps", 4 );
   myTargetArray->SetValue( "over", 5 );
   myTargetArray->SetValue( "the", 6 );
   myTargetArray->SetValue( "lazy", 7 );
   myTargetArray->SetValue( "dog", 8 );

   // Displays the values of the Array.
   Console::WriteLine(  "The target Array instance contains the following (before and after copying):" );
   PrintValues( myTargetArray );

   // Copies the source Array to the target Array, starting at index 6.
   mySourceArray->CopyTo( myTargetArray, 6 );

   // Displays the values of the Array.
   PrintValues( myTargetArray );
}

void PrintValues( Array^ myArr )
{
   System::Collections::IEnumerator^ myEnumerator = myArr->GetEnumerator();
   int i = 0;
   int cols = myArr->GetLength( myArr->Rank - 1 );
   while ( myEnumerator->MoveNext() )
   {
      if ( i < cols )
      {
         i++;
      }
      else
      {
         Console::WriteLine();
         i = 1;
      }

      Console::Write(  " {0}", myEnumerator->Current );
   }

   Console::WriteLine();
}


/*
 This code produces the following output.
 
  The target Array instance contains the following (before and after copying):
  The quick brown fox jumps over the lazy dog      
  The quick brown fox jumps over three napping cats in the barn
 */
using System;
public class SamplesArray  {

   public static void Main()  {

      // Creates and initializes two new Arrays.
      Array mySourceArray=Array.CreateInstance( typeof(String), 6 );
      mySourceArray.SetValue( "three", 0 );
      mySourceArray.SetValue( "napping", 1 );
      mySourceArray.SetValue( "cats", 2 );
      mySourceArray.SetValue( "in", 3 );
      mySourceArray.SetValue( "the", 4 );
      mySourceArray.SetValue( "barn", 5 );
      Array myTargetArray=Array.CreateInstance( typeof(String), 15 );
      myTargetArray.SetValue( "The", 0 );
      myTargetArray.SetValue( "quick", 1 );
      myTargetArray.SetValue( "brown", 2 );
      myTargetArray.SetValue( "fox", 3 );
      myTargetArray.SetValue( "jumps", 4 );
      myTargetArray.SetValue( "over", 5 );
      myTargetArray.SetValue( "the", 6 );
      myTargetArray.SetValue( "lazy", 7 );
      myTargetArray.SetValue( "dog", 8 );

      // Displays the values of the Array.
      Console.WriteLine( "The target Array contains the following (before and after copying):" );
      PrintValues( myTargetArray, ' ' );

      // Copies the source Array to the target Array, starting at index 6.
      mySourceArray.CopyTo( myTargetArray, 6 );

      // Displays the values of the Array.
      PrintValues( myTargetArray, ' ' );
   }


   public static void PrintValues( Array myArr, char mySeparator )  {
      System.Collections.IEnumerator myEnumerator = myArr.GetEnumerator();
      int i = 0;
      int cols = myArr.GetLength( myArr.Rank - 1 );
      while ( myEnumerator.MoveNext() )  {
         if ( i < cols )  {
            i++;
         } else  {
            Console.WriteLine();
            i = 1;
         }
         Console.Write( "{0}{1}", mySeparator, myEnumerator.Current );
      }
      Console.WriteLine();
   }
}
/*
This code produces the following output.

 The target Array contains the following (before and after copying):
 The quick brown fox jumps over the lazy dog      
 The quick brown fox jumps over three napping cats in the barn
*/
Imports System
Imports Microsoft.VisualBasic

Public Class SamplesArray    
    
    Public Shared Sub Main()
        
        ' Creates and initializes two new Arrays.
        Dim mySourceArray As Array = Array.CreateInstance(GetType(String), 6)
        mySourceArray.SetValue("three", 0)
        mySourceArray.SetValue("napping", 1)
        mySourceArray.SetValue("cats", 2)
        mySourceArray.SetValue("in", 3)
        mySourceArray.SetValue("the", 4)
        mySourceArray.SetValue("barn", 5)
        Dim myTargetArray As Array = Array.CreateInstance(GetType(String), 15)
        myTargetArray.SetValue("The", 0)
        myTargetArray.SetValue("quick", 1)
        myTargetArray.SetValue("brown", 2)
        myTargetArray.SetValue("fox", 3)
        myTargetArray.SetValue("jumps", 4)
        myTargetArray.SetValue("over", 5)
        myTargetArray.SetValue("the", 6)
        myTargetArray.SetValue("lazy", 7)
        myTargetArray.SetValue("dog", 8)
        
        ' Displays the values of the Array.
        Console.WriteLine("The target Array contains the following" _
           & "(before and after copying):")
        PrintValues(myTargetArray, " "c)
        
        ' Copies the source Array to the target Array, starting at index 6.
        mySourceArray.CopyTo(myTargetArray, 6)
        
        ' Displays the values of the Array.
        PrintValues(myTargetArray, " "c)
    End Sub    
    
    Public Shared Sub PrintValues(myArr As Array, mySeparator As Char)
        Dim myEnumerator As System.Collections.IEnumerator = _
           myArr.GetEnumerator()
        Dim i As Integer = 0
        Dim cols As Integer = myArr.GetLength((myArr.Rank - 1))
        While myEnumerator.MoveNext()
            If i < cols Then
                i += 1
            Else
                Console.WriteLine()
                i = 1
            End If
            Console.Write("{0}{1}", mySeparator, myEnumerator.Current)
        End While
        Console.WriteLine()
    End Sub
End Class

' This code produces the following output.
' 
'  The target Array contains the following (before and after copying):
'  The quick brown fox jumps over the lazy dog      
'  The quick brown fox jumps over three napping cats in the barn

下面的代码示例演示如何使用非零Array下限将Array复制到另一个。The following code example shows how to copy an Array to another Array with a nonzero lower bound. 请注意, 将复制Array整个源, 包括覆盖目标Array中现有元素的空元素。Note that the entire source Array is copied, including empty elements that overwrite existing elements in the target Array.

void PrintIndexAndValues( Array^ myArray );
void main2()
{
   // Creates and initializes the source Array.
   Array^ myArrayZero = Array::CreateInstance( String::typeid, 3 );
   myArrayZero->SetValue( "zero", 0 );
   myArrayZero->SetValue( "one", 1 );

   // Displays the source Array.
   Console::WriteLine(  "The array with lowbound=0 contains:" );
   PrintIndexAndValues( myArrayZero );

   // Creates and initializes the target Array.
   array<int>^myArrLen = {4};
   array<int>^myArrLow = {2};
   Array^ myArrayTwo = Array::CreateInstance( String::typeid, myArrLen, myArrLow );
   myArrayTwo->SetValue( "two", 2 );
   myArrayTwo->SetValue( "three", 3 );
   myArrayTwo->SetValue( "four", 4 );
   myArrayTwo->SetValue( "five", 5 );

   // Displays the target Array.
   Console::WriteLine(  "The array with lowbound=2 contains:" );
   PrintIndexAndValues( myArrayTwo );

   // Copy from the array with lowbound=0 to the array with lowbound=2.
   myArrayZero->CopyTo( myArrayTwo, 3 );

   // Displays the modified target Array.
   Console::WriteLine(  "\nAfter copying at relative index 1:" );
   PrintIndexAndValues( myArrayTwo );
}

void PrintIndexAndValues( Array^ myArray )
{
   for ( int i = myArray->GetLowerBound( 0 ); i <= myArray->GetUpperBound( 0 ); i++ )
      Console::WriteLine(  "\t[{0}]:\t{1}", i, myArray->GetValue( i ) );
}

/* 
 This code produces the following output.
 
 The array with lowbound=0 contains:
     [0]:    zero
     [1]:    one
     [2]:    
 The array with lowbound=2 contains:
     [2]:    two
     [3]:    three
     [4]:    four
     [5]:    five
 
 After copying at relative index 1:
     [2]:    two
     [3]:    zero
     [4]:    one
     [5]:
 */
public class SamplesArray2{

   public static void Main()  {
      // Creates and initializes the source Array.
      Array myArrayZero=Array.CreateInstance( typeof(String), 3 );
      myArrayZero.SetValue( "zero", 0 );
      myArrayZero.SetValue( "one", 1 );

      // Displays the source Array.
      Console.WriteLine( "The array with lower bound=0 contains:" );
      PrintIndexAndValues( myArrayZero );

      // Creates and initializes the target Array.
      int[] myArrLen = { 4 };
      int[] myArrLow = { 2 };
      Array myArrayTwo=Array.CreateInstance( typeof(String), myArrLen, myArrLow );
      myArrayTwo.SetValue( "two", 2 );
      myArrayTwo.SetValue( "three", 3 );
      myArrayTwo.SetValue( "four", 4 );
      myArrayTwo.SetValue( "five", 5 );

      // Displays the target Array.
      Console.WriteLine( "The array with lower bound=2 contains:" );
      PrintIndexAndValues( myArrayTwo );

      // Copies from the array with lower bound=0 to the array with lower bound=2.
      myArrayZero.CopyTo( myArrayTwo, 3 );

      // Displays the modified target Array.
      Console.WriteLine( "\nAfter copying to the target array from index 3:" );
      PrintIndexAndValues( myArrayTwo );
   }


   public static void PrintIndexAndValues( Array myArray )  {
      for ( int i = myArray.GetLowerBound(0); i <= myArray.GetUpperBound(0); i++ )
         Console.WriteLine( "\t[{0}]:\t{1}", i, myArray.GetValue( i ) );
   }
}
/* 
This code produces the following output.

The array with lower bound=0 contains:
    [0]:    zero
    [1]:    one
    [2]:    
The array with lower bound=2 contains:
    [2]:    two
    [3]:    three
    [4]:    four
    [5]:    five

After copying to the target array from index 3:
    [2]:    two
    [3]:    zero
    [4]:    one
    [5]:
*/
Public Class SamplesArray2    
    
    Public Shared Sub Main()
        ' Creates and initializes the source Array.
        Dim myArrayZero As Array = Array.CreateInstance(GetType(String), 3)
        myArrayZero.SetValue("zero", 0)
        myArrayZero.SetValue("one", 1)
        
        ' Displays the source Array.
        Console.WriteLine("The array with lower bound=0 contains:")
        PrintIndexAndValues(myArrayZero)
        
        ' Creates and initializes the target Array.
        Dim myArrLen As Integer() = {4}
        Dim myArrLow As Integer() = {2}
        Dim myArrayTwo As Array = Array.CreateInstance(GetType(String), _
           myArrLen, myArrLow)
        myArrayTwo.SetValue("two", 2)
        myArrayTwo.SetValue("three", 3)
        myArrayTwo.SetValue("four", 4)
        myArrayTwo.SetValue("five", 5)
        
        ' Displays the target Array.
        Console.WriteLine("The array with lower bound=2 contains:")
        PrintIndexAndValues(myArrayTwo)
        
        ' Copies from the array with lower bound=0 to the array with lower bound=2.
        myArrayZero.CopyTo(myArrayTwo, 3)
        
        ' Displays the modified target Array.
        Console.WriteLine(ControlChars.Cr + "After copying to the target array from " _
           + "index 3:")
        PrintIndexAndValues(myArrayTwo)
    End Sub
    
    Public Shared Sub PrintIndexAndValues(myArray As Array)
        Dim i As Integer
        For i = myArray.GetLowerBound(0) To myArray.GetUpperBound(0)
            Console.WriteLine(ControlChars.Tab + "[{0}]:" + ControlChars.Tab _
               + "{1}", i, myArray.GetValue(i))
        Next i
    End Sub
End Class

' This code produces the following output.
' 
' The array with lower bound=0 contains:
'     [0]:    zero
'     [1]:    one
'     [2]:    
' The array with lower bound=2 contains:
'     [2]:    two
'     [3]:    three
'     [4]:    four
'     [5]:    five
' 
' After copying to the target array from index 3:
'     [2]:    two
'     [3]:    zero
'     [4]:    one
'     [5]: 

注解

此方法将当前数组实例的所有元素复制到array目标数组, 从索引index开始。This method copies all the elements of the current array instance to the array destination array, starting at index index. array目标数组必须已设置了维度, 并且必须具有足够数量的元素来容纳复制的元素。The array destination array must already have been dimensioned and must have a sufficient number of elements to accommodate the copied elements. 否则,该方法将引发异常。Otherwise, the method throws an exception.

此方法支持System.Collections.ICollection接口。This method supports the System.Collections.ICollection interface. 如果不System.Collections.ICollection显式需要实现, 请使用Copy以避免额外的间接寻址。If implementing System.Collections.ICollection is not explicitly required, use Copy to avoid an extra indirection.

如果此方法在复制时引发异常, array则的状态为 undefined。If this method throws an exception while copying, the state of array is undefined.

此方法是 O (n) 运算, 其中nLength。它仅执行浅表复制。This method is an O(n) operation, where n is Length.It performs a shallow copy only.

另请参阅

CopyTo(Array, Int64) CopyTo(Array, Int64) CopyTo(Array, Int64)

从指定的目标数组索引处开始,将当前一维数组的所有元素复制到指定的一维数组中。Copies all the elements of the current one-dimensional array to the specified one-dimensional array starting at the specified destination array index. 索引指定为 64 位整数。The index is specified as a 64-bit integer.

public:
 void CopyTo(Array ^ array, long index);
[System.Runtime.InteropServices.ComVisible(false)]
public void CopyTo (Array array, long index);
member this.CopyTo : Array * int64 -> unit

参数

array
Array Array Array

一维数组,它是从当前数组复制的元素的目标。The one-dimensional array that is the destination of the elements copied from the current array.

index
Int64 Int64 Int64

一个 64 位整数,它表示 array 中复制开始处的索引。A 64-bit integer that represents the index in array at which copying begins.

异常

index 超出了 array 的有效索引范围。index is outside the range of valid indexes for array.

array 是多维的。array is multidimensional.

-or- 源数组中的元素数大于从 index 到目标 array 的末尾之间的可用元素数。The number of elements in the source array is greater than the available number of elements from index to the end of the destination array.

无法自动将源 Array 的类型转换为目标 array 的类型。The type of the source Array cannot be cast automatically to the type of the destination array.

Array 是多维的。The source Array is multidimensional.

Array 中至少有一个元素无法转换为目标 array 的类型。At least one element in the source Array cannot be cast to the type of destination array.

示例

下面的代码示例演示如何将复制Array到另Array一个。The following code example shows how to copy an Array to another Array.

using namespace System;
void main1();
void main2();
void main()
{
   main1();
   Console::WriteLine();
   main2();
}

void PrintValues( Array^ myArr );
void main1()
{
   // Creates and initializes two new Array instances.
   Array^ mySourceArray = Array::CreateInstance( String::typeid, 6 );
   mySourceArray->SetValue( "three", 0 );
   mySourceArray->SetValue( "napping", 1 );
   mySourceArray->SetValue( "cats", 2 );
   mySourceArray->SetValue( "in", 3 );
   mySourceArray->SetValue( "the", 4 );
   mySourceArray->SetValue( "barn", 5 );
   Array^ myTargetArray = Array::CreateInstance( String::typeid, 15 );
   myTargetArray->SetValue( "The", 0 );
   myTargetArray->SetValue( "quick", 1 );
   myTargetArray->SetValue( "brown", 2 );
   myTargetArray->SetValue( "fox", 3 );
   myTargetArray->SetValue( "jumps", 4 );
   myTargetArray->SetValue( "over", 5 );
   myTargetArray->SetValue( "the", 6 );
   myTargetArray->SetValue( "lazy", 7 );
   myTargetArray->SetValue( "dog", 8 );

   // Displays the values of the Array.
   Console::WriteLine(  "The target Array instance contains the following (before and after copying):" );
   PrintValues( myTargetArray );

   // Copies the source Array to the target Array, starting at index 6.
   mySourceArray->CopyTo( myTargetArray, 6 );

   // Displays the values of the Array.
   PrintValues( myTargetArray );
}

void PrintValues( Array^ myArr )
{
   System::Collections::IEnumerator^ myEnumerator = myArr->GetEnumerator();
   int i = 0;
   int cols = myArr->GetLength( myArr->Rank - 1 );
   while ( myEnumerator->MoveNext() )
   {
      if ( i < cols )
      {
         i++;
      }
      else
      {
         Console::WriteLine();
         i = 1;
      }

      Console::Write(  " {0}", myEnumerator->Current );
   }

   Console::WriteLine();
}


/*
 This code produces the following output.
 
  The target Array instance contains the following (before and after copying):
  The quick brown fox jumps over the lazy dog      
  The quick brown fox jumps over three napping cats in the barn
 */
using System;
public class SamplesArray  {

   public static void Main()  {

      // Creates and initializes two new Arrays.
      Array mySourceArray=Array.CreateInstance( typeof(String), 6 );
      mySourceArray.SetValue( "three", 0 );
      mySourceArray.SetValue( "napping", 1 );
      mySourceArray.SetValue( "cats", 2 );
      mySourceArray.SetValue( "in", 3 );
      mySourceArray.SetValue( "the", 4 );
      mySourceArray.SetValue( "barn", 5 );
      Array myTargetArray=Array.CreateInstance( typeof(String), 15 );
      myTargetArray.SetValue( "The", 0 );
      myTargetArray.SetValue( "quick", 1 );
      myTargetArray.SetValue( "brown", 2 );
      myTargetArray.SetValue( "fox", 3 );
      myTargetArray.SetValue( "jumps", 4 );
      myTargetArray.SetValue( "over", 5 );
      myTargetArray.SetValue( "the", 6 );
      myTargetArray.SetValue( "lazy", 7 );
      myTargetArray.SetValue( "dog", 8 );

      // Displays the values of the Array.
      Console.WriteLine( "The target Array contains the following (before and after copying):" );
      PrintValues( myTargetArray, ' ' );

      // Copies the source Array to the target Array, starting at index 6.
      mySourceArray.CopyTo( myTargetArray, 6 );

      // Displays the values of the Array.
      PrintValues( myTargetArray, ' ' );
   }


   public static void PrintValues( Array myArr, char mySeparator )  {
      System.Collections.IEnumerator myEnumerator = myArr.GetEnumerator();
      int i = 0;
      int cols = myArr.GetLength( myArr.Rank - 1 );
      while ( myEnumerator.MoveNext() )  {
         if ( i < cols )  {
            i++;
         } else  {
            Console.WriteLine();
            i = 1;
         }
         Console.Write( "{0}{1}", mySeparator, myEnumerator.Current );
      }
      Console.WriteLine();
   }
}
/*
This code produces the following output.

 The target Array contains the following (before and after copying):
 The quick brown fox jumps over the lazy dog      
 The quick brown fox jumps over three napping cats in the barn
*/
Imports System
Imports Microsoft.VisualBasic

Public Class SamplesArray    
    
    Public Shared Sub Main()
        
        ' Creates and initializes two new Arrays.
        Dim mySourceArray As Array = Array.CreateInstance(GetType(String), 6)
        mySourceArray.SetValue("three", 0)
        mySourceArray.SetValue("napping", 1)
        mySourceArray.SetValue("cats", 2)
        mySourceArray.SetValue("in", 3)
        mySourceArray.SetValue("the", 4)
        mySourceArray.SetValue("barn", 5)
        Dim myTargetArray As Array = Array.CreateInstance(GetType(String), 15)
        myTargetArray.SetValue("The", 0)
        myTargetArray.SetValue("quick", 1)
        myTargetArray.SetValue("brown", 2)
        myTargetArray.SetValue("fox", 3)
        myTargetArray.SetValue("jumps", 4)
        myTargetArray.SetValue("over", 5)
        myTargetArray.SetValue("the", 6)
        myTargetArray.SetValue("lazy", 7)
        myTargetArray.SetValue("dog", 8)
        
        ' Displays the values of the Array.
        Console.WriteLine("The target Array contains the following" _
           & "(before and after copying):")
        PrintValues(myTargetArray, " "c)
        
        ' Copies the source Array to the target Array, starting at index 6.
        mySourceArray.CopyTo(myTargetArray, 6)
        
        ' Displays the values of the Array.
        PrintValues(myTargetArray, " "c)
    End Sub    
    
    Public Shared Sub PrintValues(myArr As Array, mySeparator As Char)
        Dim myEnumerator As System.Collections.IEnumerator = _
           myArr.GetEnumerator()
        Dim i As Integer = 0
        Dim cols As Integer = myArr.GetLength((myArr.Rank - 1))
        While myEnumerator.MoveNext()
            If i < cols Then
                i += 1
            Else
                Console.WriteLine()
                i = 1
            End If
            Console.Write("{0}{1}", mySeparator, myEnumerator.Current)
        End While
        Console.WriteLine()
    End Sub
End Class

' This code produces the following output.
' 
'  The target Array contains the following (before and after copying):
'  The quick brown fox jumps over the lazy dog      
'  The quick brown fox jumps over three napping cats in the barn

下面的代码示例演示如何使用非零Array下限将Array复制到另一个。The following code example shows how to copy an Array to another Array with a nonzero lower bound. 请注意, 将复制Array整个源, 包括覆盖目标Array中现有元素的空元素。Note that the entire source Array is copied, including empty elements that overwrite existing elements in the target Array.

void PrintIndexAndValues( Array^ myArray );
void main2()
{
   // Creates and initializes the source Array.
   Array^ myArrayZero = Array::CreateInstance( String::typeid, 3 );
   myArrayZero->SetValue( "zero", 0 );
   myArrayZero->SetValue( "one", 1 );

   // Displays the source Array.
   Console::WriteLine(  "The array with lowbound=0 contains:" );
   PrintIndexAndValues( myArrayZero );

   // Creates and initializes the target Array.
   array<int>^myArrLen = {4};
   array<int>^myArrLow = {2};
   Array^ myArrayTwo = Array::CreateInstance( String::typeid, myArrLen, myArrLow );
   myArrayTwo->SetValue( "two", 2 );
   myArrayTwo->SetValue( "three", 3 );
   myArrayTwo->SetValue( "four", 4 );
   myArrayTwo->SetValue( "five", 5 );

   // Displays the target Array.
   Console::WriteLine(  "The array with lowbound=2 contains:" );
   PrintIndexAndValues( myArrayTwo );

   // Copy from the array with lowbound=0 to the array with lowbound=2.
   myArrayZero->CopyTo( myArrayTwo, 3 );

   // Displays the modified target Array.
   Console::WriteLine(  "\nAfter copying at relative index 1:" );
   PrintIndexAndValues( myArrayTwo );
}

void PrintIndexAndValues( Array^ myArray )
{
   for ( int i = myArray->GetLowerBound( 0 ); i <= myArray->GetUpperBound( 0 ); i++ )
      Console::WriteLine(  "\t[{0}]:\t{1}", i, myArray->GetValue( i ) );
}

/* 
 This code produces the following output.
 
 The array with lowbound=0 contains:
     [0]:    zero
     [1]:    one
     [2]:    
 The array with lowbound=2 contains:
     [2]:    two
     [3]:    three
     [4]:    four
     [5]:    five
 
 After copying at relative index 1:
     [2]:    two
     [3]:    zero
     [4]:    one
     [5]:
 */
public class SamplesArray2{

   public static void Main()  {
      // Creates and initializes the source Array.
      Array myArrayZero=Array.CreateInstance( typeof(String), 3 );
      myArrayZero.SetValue( "zero", 0 );
      myArrayZero.SetValue( "one", 1 );

      // Displays the source Array.
      Console.WriteLine( "The array with lower bound=0 contains:" );
      PrintIndexAndValues( myArrayZero );

      // Creates and initializes the target Array.
      int[] myArrLen = { 4 };
      int[] myArrLow = { 2 };
      Array myArrayTwo=Array.CreateInstance( typeof(String), myArrLen, myArrLow );
      myArrayTwo.SetValue( "two", 2 );
      myArrayTwo.SetValue( "three", 3 );
      myArrayTwo.SetValue( "four", 4 );
      myArrayTwo.SetValue( "five", 5 );

      // Displays the target Array.
      Console.WriteLine( "The array with lower bound=2 contains:" );
      PrintIndexAndValues( myArrayTwo );

      // Copies from the array with lower bound=0 to the array with lower bound=2.
      myArrayZero.CopyTo( myArrayTwo, 3 );

      // Displays the modified target Array.
      Console.WriteLine( "\nAfter copying to the target array from index 3:" );
      PrintIndexAndValues( myArrayTwo );
   }


   public static void PrintIndexAndValues( Array myArray )  {
      for ( int i = myArray.GetLowerBound(0); i <= myArray.GetUpperBound(0); i++ )
         Console.WriteLine( "\t[{0}]:\t{1}", i, myArray.GetValue( i ) );
   }
}
/* 
This code produces the following output.

The array with lower bound=0 contains:
    [0]:    zero
    [1]:    one
    [2]:    
The array with lower bound=2 contains:
    [2]:    two
    [3]:    three
    [4]:    four
    [5]:    five

After copying to the target array from index 3:
    [2]:    two
    [3]:    zero
    [4]:    one
    [5]:
*/
Public Class SamplesArray2    
    
    Public Shared Sub Main()
        ' Creates and initializes the source Array.
        Dim myArrayZero As Array = Array.CreateInstance(GetType(String), 3)
        myArrayZero.SetValue("zero", 0)
        myArrayZero.SetValue("one", 1)
        
        ' Displays the source Array.
        Console.WriteLine("The array with lower bound=0 contains:")
        PrintIndexAndValues(myArrayZero)
        
        ' Creates and initializes the target Array.
        Dim myArrLen As Integer() = {4}
        Dim myArrLow As Integer() = {2}
        Dim myArrayTwo As Array = Array.CreateInstance(GetType(String), _
           myArrLen, myArrLow)
        myArrayTwo.SetValue("two", 2)
        myArrayTwo.SetValue("three", 3)
        myArrayTwo.SetValue("four", 4)
        myArrayTwo.SetValue("five", 5)
        
        ' Displays the target Array.
        Console.WriteLine("The array with lower bound=2 contains:")
        PrintIndexAndValues(myArrayTwo)
        
        ' Copies from the array with lower bound=0 to the array with lower bound=2.
        myArrayZero.CopyTo(myArrayTwo, 3)
        
        ' Displays the modified target Array.
        Console.WriteLine(ControlChars.Cr + "After copying to the target array from " _
           + "index 3:")
        PrintIndexAndValues(myArrayTwo)
    End Sub
    
    Public Shared Sub PrintIndexAndValues(myArray As Array)
        Dim i As Integer
        For i = myArray.GetLowerBound(0) To myArray.GetUpperBound(0)
            Console.WriteLine(ControlChars.Tab + "[{0}]:" + ControlChars.Tab _
               + "{1}", i, myArray.GetValue(i))
        Next i
    End Sub
End Class

' This code produces the following output.
' 
' The array with lower bound=0 contains:
'     [0]:    zero
'     [1]:    one
'     [2]:    
' The array with lower bound=2 contains:
'     [2]:    two
'     [3]:    three
'     [4]:    four
'     [5]:    five
' 
' After copying to the target array from index 3:
'     [2]:    two
'     [3]:    zero
'     [4]:    one
'     [5]: 

注解

此方法将当前数组实例的所有元素复制到array目标数组, 从索引index开始。This method copies all the elements of the current array instance to the array destination array, starting at index index. array目标数组必须已设置了维度, 并且必须具有足够数量的元素来容纳复制的元素。The array destination array must already have been dimensioned and must have a sufficient number of elements to accommodate the copied elements. 否则,该方法将引发异常。Otherwise, the method throws an exception.

此方法支持System.Collections.ICollection接口。This method supports the System.Collections.ICollection interface. 如果不System.Collections.ICollection显式需要实现, 请使用Copy以避免额外的间接寻址。If implementing System.Collections.ICollection is not explicitly required, use Copy to avoid an extra indirection.

如果此方法在复制时引发异常, array则的状态为 undefined。If this method throws an exception while copying, the state of array is undefined.

此方法是 O (n) 运算, 其中nLength。它仅执行浅表复制。This method is an O(n) operation, where n is Length.It performs a shallow copy only.

另请参阅

适用于