C#中如何创建文件夹

时间：2011-01-26 来源：Pegasus923

if (!Directory.Exists(sPath))
                    {
                        Directory.CreateDirectory(sPath);
                    }

Directory Class

http://msdn.microsoft.com/en-us/library/system.io.directory.aspx

以下代码首先检查指定的文件夹是否存在，若存在则删除之，否则创建之。接下来移动文件夹，在其中创建文件并统计文件夹中文件数目。

How to create/delete/move directory

 1 using System;
 2 using System.IO;
 3 
 4  class Test 
 5 {
 6     public static void Main() 
 7     {
 8         // Specify the directories you want to manipulate.
 9          string path = @"c:\MyDir";
10         string target = @"c:\TestDir";
11 
12         try 
13         {
14             // Determine whether the directory exists.
15              if (!Directory.Exists(path)) 
16             {
17                 // Create the directory it does not exist.
18                 Directory.CreateDirectory(path);
19             }
20 
21             if (Directory.Exists(target)) 
22             {
23                 // Delete the target to ensure it is not there.
24                 Directory.Delete(target, true);
25             }
26 
27             // Move the directory.
28             Directory.Move(path, target);
29 
30             // Create a file in the directory.
31             File.CreateText(target + @"\myfile.txt");
32 
33             // Count the files in the target directory.
34             Console.WriteLine("The number of files in {0} is {1}",
35                 target, Directory.GetFiles(target).Length);
36         } 
37         catch (Exception e) 
38         {
39             Console.WriteLine("The process failed: {0}", e.ToString());
40         } 
41         finally {}
42     }
43 }

以下代码演示了如何计算文件夹大小。

How to calculate the size of a directory

 1 // The following example calculates the size of a directory
 2 // and its subdirectories, if any, and displays the total size
 3 // in bytes.
 4 
 5 using System;
 6 using System.IO;
 7 
 8 public class ShowDirSize 
 9 {
10     public static long DirSize(DirectoryInfo d) 
11     {    
12         long Size = 0;    
13         // Add file sizes.
14         FileInfo[] fis = d.GetFiles();
15         foreach (FileInfo fi in fis) 
16         {      
17             Size += fi.Length;    
18         }
19         // Add subdirectory sizes.
20         DirectoryInfo[] dis = d.GetDirectories();
21         foreach (DirectoryInfo di in dis) 
22         {
23             Size += DirSize(di);   
24         }
25         return(Size);  
26     }
27     public static void Main(string[] args) 
28     {
29         if (args.Length != 1) 
30         {
31             Console.WriteLine("You must provide a directory argument at the command line.");    
32         } 
33         else 
34         {  
35             DirectoryInfo d = new DirectoryInfo(args[0]);
36             long dsize = DirSize(d);
37             Console.WriteLine("The size of {0} and its subdirectories is {1} bytes.", d, dsize);
38         }
39     }
40 }