C# 将一个字符串数组复制到另一个
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原文地址: http://stackoverflow.com/questions/886488/
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Copy one string array to another
提问by Arunachalam
How can I copy a string[]from another string[]?
如何string[]从另一个复制一个string[]？
Suppose I have string[] args. How can I copy it to another array string[] args1?
假设我有string[] args. 如何将其复制到另一个数组string[] args1？
采纳答案by sharptooth
Allocate space for the target array, that use Array.CopyTo():
为使用 Array.CopyTo() 的目标数组分配空间：
targetArray = new string[sourceArray.Length];
sourceArray.CopyTo( targetArray, 0 );
回答by Jon Skeet
- To create a completely new array with the same contents (as a shallow copy): call
Array.Cloneand just cast the result. - To copy a portion of a string array into another string array: call
Array.CopyorArray.CopyTo
- 要创建一个具有相同内容的全新数组（作为浅拷贝）：调用
Array.Clone并只转换结果。 - 要将字符串数组的一部分复制到另一个字符串数组中：调用
Array.Copy或Array.CopyTo
For example:
例如：
using System;
class Test
{
static void Main(string[] args)
{
// Clone the whole array
string[] args2 = (string[]) args.Clone();
// Copy the five elements with indexes 2-6
// from args into args3, stating from
// index 2 of args3.
string[] args3 = new string[5];
Array.Copy(args, 2, args3, 0, 5);
// Copy whole of args into args4, starting from
// index 2 (of args4)
string[] args4 = new string[args.Length+2];
args.CopyTo(args4, 2);
}
}
Assuming we start off with args = { "a", "b", "c", "d", "e", "f", "g", "h" }the results are:
假设我们从args = { "a", "b", "c", "d", "e", "f", "g", "h" }结果开始：
args2 = { "a", "b", "c", "d", "e", "f", "g", "h" }
args3 = { "c", "d", "e", "f", "g" }
args4 = { null, null, "a", "b", "c", "d", "e", "f", "g", "h" }
回答by stt106
The above answers show a shallow clone; so I thought I add a deep clone example using serialization; of course a deep clone can also be done by looping through the original array and copy each element into a brand new array.
上面的答案显示了一个浅层克隆；所以我想我使用序列化添加了一个深度克隆示例；当然，深度克隆也可以通过循环遍历原始数组并将每个元素复制到一个全新的数组中来完成。
private static T[] ArrayDeepCopy<T>(T[] source)
{
using (var ms = new MemoryStream())
{
var bf = new BinaryFormatter{Context = new StreamingContext(StreamingContextStates.Clone)};
bf.Serialize(ms, source);
ms.Position = 0;
return (T[]) bf.Deserialize(ms);
}
}
Testing the deep clone:
测试深度克隆：
private static void ArrayDeepCloneTest()
{
//a testing array
CultureInfo[] secTestArray = { new CultureInfo("en-US", false), new CultureInfo("fr-FR") };
//deep clone
var secCloneArray = ArrayDeepCopy(secTestArray);
//print out the cloned array
Array.ForEach(secCloneArray, x => Console.WriteLine(x.DateTimeFormat.DateSeparator));
//modify the original array
secTestArray[0].DateTimeFormat.DateSeparator = "-";
Console.WriteLine();
//show the (deep) cloned array unchanged whereas a shallow clone would reflect the change...
Array.ForEach(secCloneArray, x => Console.WriteLine(x.DateTimeFormat.DateSeparator));
}
