FileStream -- 复制文件

 1 using System;

 2 using System.Collections.Generic;

 3 using System.Linq;

 4 using System.Text;

 5 using System.Threading.Tasks;

 6 

 7 //添加命名空间

 8 using System.IO;

 9 

10 namespace 文件流

11 {

12     class Program

13     {

14         static void Main(string[] args)

15         {

16             string source = @"C:\Users\Administrator\Desktop\增加.gif";

17 

18             string target = @"C:\Users\Administrator\Desktop\new.gif";

19 

20             Command.CopyFile(source, target);

21 

22             Console.WriteLine("复制成功！");

23 

24             Console.ReadKey();

25         }

26     }

27 

28     //操作类

29     public class Command

30     {

31         public static void CopyFile(string source, string target)

32         {

33             //创建读取流

34             using(FileStream fsRead = new FileStream(source, FileMode.Open, FileAccess.Read))

35             {

36                 //创建写入流

37                 using(FileStream fsWrite = new FileStream(target, FileMode.OpenOrCreate, FileAccess.Write))

38                 {

39                     //字节数组，存放取出的字节数

40                     byte[] buffer = new byte[1024 * 1024 * 5];

41 

42                     //循环，当i！=0的时候循环

43                     while (true)

44                     {

45                         //当前是假存到字节数组中的字节数

46                         int i = fsRead.Read(buffer, 0, buffer.Length);

47 

48                         //如果i==0，break；

49                         if (i == 0)

50                         {

51                             break;

52                         }

53 

54                         //写入数据

55                         fsWrite.Write(buffer, 0, i);

56                     }

57                 }

58             }

59         }

60     }

61 }