.NET只提供了文件的Copy方法,但却没有提供文件夹的Copy方法,经过一天的努力,终于搞定.现贴出主要代码供大家参考,欢迎大家提出建议. 代码如下:          public int DirectoryName(string DirectoryPath)//获取文件夹名，截取“\” 
         { 
         int j = 0;      char[] c = DirectoryPath.ToCharArray(); 
          for (int i = c.Length - 1; i >= 0; i--)//从后面截取 
          { 
         j = i; 
         if (c[i] == '\\') 
          { 
         break;//遇"\"调处,并返回"\"的位置 
          } 
         } 
         return j+1; 
         } 
         public void CopyDirectory(string DirectoryPath,string DirAddress)//复制文件夹， 
          { 
             #region//递归 
             string s = DirectoryPath.Substring(DirectoryName(DirectoryPath));//获取文件夹名 
              if (Directory.Exists(DirAddress + "\\" + s)) 
             { 
                 Directory.Delete(DirAddress + "\\" + s,true);//若文件夹存在，不管目录是否为空，删除 
                  Directory.CreateDirectory(DirAddress + "\\" + s);//删除后，重新创建文件夹 
             } 
             else 
              { 
                  Directory.CreateDirectory(DirAddress + "\\" + s);//文件夹不存在，创建 
             } 
             DirectoryInfo DirectoryArray = new DirectoryInfo(DirectoryPath); 
             FileInfo[] Files = DirectoryArray.GetFiles();//获取该文件夹下的文件列表 
             DirectoryInfo[] Directorys = DirectoryArray.GetDirectories();//获取该文件夹下的文件夹列表 
             foreach (FileInfo inf in Files)//逐个复制文件 
             { 
                 File.Copy(DirectoryPath + "\\" + inf.Name, DirAddress + "\\" + s + "\\" + inf.Name); 
             } 
             foreach (DirectoryInfo Dir in Directorys)//逐个获取文件夹名称，并递归调用方法本身 
             { 
                 CopyDirectory(DirectoryPath + "\\" + Dir.Name, DirAddress + "\\" + s); 
             } 
             #endregion 
         } 



         以上是已经通过检验成功的代码,是通过递归的方式来逐个复制文件和创建文件夹.还一种方法是通过使用DOS命令行来实现的,可是不知道为什么同样的命令行,我在CMD中使用可以,在程序中就不行呢，请指教。 

         以下是代码:          #region 
         //方法一:DOS命令:xcopy c:\docume~1\andy e:\andy /s/e   未实现 
          string s = DirectoryPath.Substring(DirectoryName(DirectoryPath));//获取文件夹名 
         Directory.CreateDirectory(DirAddress + "\\" + s);//创建文件夹 
         System.Diagnostics.Process process = new System.Diagnostics.Process(); 
         process.StartInfo.FileName = "cmd"; 
         process.StartInfo.Arguments = "xcopy \"" + DirectoryPath + "\" \"" + DirAddress + "\\" + s + "\" /s/e"; 
         process.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; 
         process.StartInfo.CreateNoWindow = true; 
         process.StartInfo.UseShellExecute = false; 
         process.StartInfo.RedirectStandardOutput = true; 
         process.Start(); 
         process.WaitForExit(); 
         #endregion