关于Clone的问题。

[bruse82]

请教如何对一个Arraylist进行clone,要求是对Arraylist里的对象也值进行值的复制而不是它的地址?
多谢。

[Eddie005]

Arraylistm没有Clone方法，只有CopyTo方法

[BearRui]

see:

using System;
using System.Collections;
public class SamplesArrayList {

public static void Main() {

// Creates and initializes the source ArrayList.
ArrayList mySourceList = new ArrayList();
mySourceList.Add( "three" );
mySourceList.Add( "napping" );
mySourceList.Add( "cats" );
mySourceList.Add( "in" );
mySourceList.Add( "the" );
mySourceList.Add( "barn" );

// Creates and initializes the one-dimensional target Array.
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( "jumped", 4 );
myTargetArray.SetValue( "over", 5 );
myTargetArray.SetValue( "the", 6 );
myTargetArray.SetValue( "lazy", 7 );
myTargetArray.SetValue( "dog", 8 );

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

// Copies the second element from the source ArrayList to the target ArrayList, starting at index 7.
mySourceList.CopyTo( 1, myTargetArray, 7, 1 );

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

// Copies the entire source ArrayList to the target ArrayList, starting at index 6.
mySourceList.CopyTo( myTargetArray, 6 );

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

// Copies the entire source ArrayList to the target ArrayList, starting at index 0.
mySourceList.CopyTo( myTargetArray );

// Displays the values of the target 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();
}
}

[BearRui]

ArrayList有Clone 方法，不过好象不会复制数据！！！

[Eddie005]

sorry,搞错了
Dim tmp As System.Collections.ArrayList = New System.Collections.ArrayList
Dim tmp2 As System.Collections.ArrayList = tmp.Clone()

[Eddie005]

但是Clone是浅副本