將一個字符串數組複製到另一個

Question

如何從另一個string[]複製string[]？

假設我有string[] args。我如何將它複製到另一個陣列string[] args1？

Answer 1

分配空間爲目標磁盤陣列，使用Array.CopyTo（）：

targetArray = new string[sourceArray.Length]; 
sourceArray.CopyTo(targetArray, 0); 

Answer 2

• 要創建具有相同內容的全新陣列（如淺表副本）：呼叫Array.Clone和只投結果。
• 爲字符串陣列的一部分複製到另一個字符串數組：呼叫Array.Copy或Array.CopyTo

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); 
    } 
} 

假設我們開始了與args = { "a", "b", "c", "d", "e", "f", "g", "h" }的結果是：

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" } 

Answer 3

上面的答案顯示了一個淺層克隆;所以我想我使用序列化添加了一個深層克隆示例;當然也可以通過循環原始數組並將每個元素複製到一個全新的數組中來完成深度克隆。

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); 
      } 
     } 

測試深克隆：

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)); 
     }