文件下载

 1  
 2     
         //下载文件
 3       public  void  DownLoad(string url){
 4          url=ConvertServerPath(url);   
 6          string filePath =Server.MapPath(url);
 7          FileInfo   fileinfo =new FileInfo ();
 8          Response.Clear();
 9          Response.ClearContent();
10          Response.ClearHeaders();
11          Response.AddHeader("Content-Disposition","attachment;filename"+fileInfo.Name);
12          Response.AddHeader("Content-Length", fileInfo.Length.ToString());
13          Response.AddHeader("Content-Transfer-Encoding", "binary");
14          Response.ContentType = "application/octet-stream";
15          Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
16          Response.WriteFile(fileinfo.FullName);
17          Response.Flush();
18          Response.End();
19 
20       }
21 
22      
23     //转换成网站路径
24      public  string  ConvertServerPath(string url){
25      string  mapPath =HttpContext.Current.Server.MapPath(HttpContext.Current.Request.ApplicationPath.ToString()); //系统根路径
28      string  xdPath=url.Replace(mapPath,"~"); //网站路径
30      xdPath=xdpath.Replace(@"\",@"/");
31      return xdPath;
3 }

 
       //上传文件
      
       public   void   UpLoad(FileUpload   upload){
           if(upload.HasFile){  //存在文件
              string file      
          }
        
       }