c#copyto

C＃String.CopyTo()方法 (C# String.CopyTo() Method)

String.CopyTo() method is used to copy a specified number of characters from given indexes of the string to the specified position in a character array.

String.CopyTo()方法用于將指定數(shù)量的字符從給定的字符串索引復(fù)制到字符數(shù)組中的指定位置。

Syntax:

句法：

public void CopyTo (int source_index, char[] destination, int destination_index, int count);

Parameter:

參數(shù)：

• source_index - index to the string from where you want to copy the string

  source_index-要從中復(fù)制字符串的字符串的索引

• destination - target character array in which you want to copy the part of the string

  destination-您要在其中復(fù)制字符串部分的目標(biāo)字符數(shù)組

• destination_index - index in the targeted character array

  destination_index-目標(biāo)字符數(shù)組中的索引

• count - total number of characters to be copied in character array

  count-要在字符數(shù)組中復(fù)制的字符總數(shù)

Return value: void - It returns nothing.

返回值： void-不返回任何內(nèi)容。

Example:

例：

Input:string str = "Hello world!";char[] arr = { 'I', 'n', 'c', 'l', 'u', 'd', 'H', 'e', 'l', 'p' };copying "Hello " to arr:str.CopyTo(0, arr, 0, 6);Output:str = Hello world!arr = Hello Help

C＃使用String.CopyTo()方法將字符從字符串復(fù)制到字符數(shù)組的示例 (C# Example to copy a characters from string to characters array using String.CopyTo() method)

using System; using System.Text;namespace Test {class Program{static void printCharArray(char[] a){foreach (char item in a){Console.Write(item);}}static void Main(string[] args){string str = "Hello world!";char[] arr = { 'I', 'n', 'c', 'l', 'u', 'd', 'H', 'e', 'l', 'p' };//printing valuesConsole.WriteLine("Before CopyTo...");Console.WriteLine("str = " + str);Console.Write("arr = ");printCharArray(arr);Console.WriteLine();//copying "Hello " to arrstr.CopyTo(0, arr, 0, 6);//printing valuesConsole.WriteLine("After CopyTo 1)...");Console.WriteLine("str = " + str);Console.Write("arr = ");printCharArray(arr);Console.WriteLine();//copying "World! " to arrstr.CopyTo(6, arr, 0, 6);//printing valuesConsole.WriteLine("After CopyTo 1)...");Console.WriteLine("str = " + str);Console.Write("arr = ");printCharArray(arr);Console.WriteLine();//hit ENTER to exitConsole.ReadLine();}} }

Output

輸出量

Before CopyTo... str = Hello world! arr = IncludHelp After CopyTo 1)... str = Hello world! arr = Hello Help After CopyTo 1)... str = Hello world! arr = world!Help

Reference: String.CopyTo(Int32, Char[], Int32, Int32) Method

參考： String.CopyTo(Int32，Char []，Int32，Int32)方法

翻譯自: https://www.includehelp.com/dot-net/string-copyto-method-with-example-in-c-sharp.aspx

c#copyto

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