Ｃ＃ 创建文件夹

C#中对文件夹操作需要用到Directory Class。其中提供了创建、删除、移动、枚举等静态方法。该类不能被继承。

 

以下代码实现了创建文件夹。

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

 以下是MSDN上Directory Class的Sample code。

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。

using System;
using System.IO;
 
class Test
{
    public static void Main()
    {
        // Specify the directories you want to manipulate.
        string path = @"c:MyDir";
        string target = @"c:TestDir";
 
        try
        {
            // Determine whether the directory exists.
            if (!Directory.Exists(path))
            {
                // Create the directory it does not exist.
                Directory.CreateDirectory(path);
            }
 
            if (Directory.Exists(target))
            {
                // Delete the target to ensure it is not there.
                Directory.Delete(target, true);
            }
 
            // Move the directory.
            Directory.Move(path, target);
 
            // Create a file in the directory.
            File.CreateText(target + @"myfile.txt");
 
            // Count the files in the target directory.
            Console.WriteLine("The number of files in {0} is {1}",
                target, Directory.GetFiles(target).Length);
        }
        catch (Exception e)
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
        finally {}
    }
}

以下代码演示了如何计算文件夹大小。

// The following example calculates the size of a directory
// and its subdirectories, if any, and displays the total size
// in bytes.
 
using System;
using System.IO;
 
public class ShowDirSize
{
    public static long DirSize(DirectoryInfo d)
    {   
        long Size = 0;   
        // Add file sizes.
        FileInfo[] fis = d.GetFiles();
        foreach (FileInfo fi in fis)
        {     
            Size += fi.Length;   
        }
        // Add subdirectory sizes.
        DirectoryInfo[] dis = d.GetDirectories();
        foreach (DirectoryInfo di in dis)
        {
            Size += DirSize(di);  
        }
        return(Size); 
    }
    public static void Main(string[] args)
    {
        if (args.Length != 1)
        {
            Console.WriteLine("You must provide a directory argument at the command line.");   
        }
        else
        { 
            DirectoryInfo d = new DirectoryInfo(args[0]);
            long dsize = DirSize(d);
            Console.WriteLine("The size of {0} and its subdirectories is {1} bytes.", d, dsize);
        }
    }
}