Asp.net IO类递归显示目录,文件信息

private void page_load(object sender, system.eventargs e)
  {    
   string [email protected]"目录绝对路径";
   directoryinfo thisone=new directoryinfo(strdirlist);
   response.write("<pre>");
   listtreeshow(thisone,0);
   response.write("</pre>");
  }

  private void listtreeshow(directoryinfo thedir,int nlevel)//递归目录 文件
  {
   directoryinfo[] subdirectories=thedir.getdirectories();//获得目录
   //for(int i=0;i<subdirectories.length;i++)
   foreach   (directoryinfo   dirinfo   in   subdirectories)
   {
    response.write("深度="+nlevel+"<br>");
    response.write("文件夹:"+dirinfo.name+"/r/n<br>");
    fileinfo[]   fileinfo   =dirinfo.getfiles();   //目录下的文件
    //fileinfo[] fileinfo=dirinfo.getfiles("*.dwt");//获取指定类型的文件  
    foreach   (fileinfo   finfo   in   fileinfo)    
    {              
     response.write("文件="+finfo.name.tostring()+"/r/n/n");   
    }    
    listtreeshow(dirinfo,nlevel+1);
   }
  }