C#中對文件夾操作需要用到Directory Class。其中提供了創建、刪除、移動、枚舉等靜態方法。該類不能被繼承。

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以下代碼實現了創建文件夾。

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

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以下是MSDN上Directory Class的Sample code。

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

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以下代碼首先檢查指定的文件夾是否存在，若存在則刪除之，否則創建之。接下來移動文件夾，在其中創建文件并統計文件夾中文件數目。

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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 {} ????} }

以下代碼演示了如何計算文件夾大小。

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// 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); ????????} ????} }

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