下载文件代码

一、下载文件

 string str = Request.QueryString["D_Url"].ToString();  //虚拟文件路径

 string str1 = str.Remove(0, str.LastIndexOf("/") + 1);

string filePath=“~/UserFiles/”;

filePath=System.IO.Path.Combine(filePath,str1); //将文件的物理路径和文件名称合到一块组合成完整的完整文件路径

  Response.Clear();
                Response.ContentType = "application/octet-stream";
                Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Server.MapPath(filePath)));
                Response.WriteFile(filePath);
                Response.End();

打开文件:     string str = Request.QueryString["D_Url"].ToString();

                   string str1 = str.Remove(0, str.LastIndexOf("/") + 1);

           //string str2 = Server.MapPath("UserFiles//") + str1;   //打开文件
                //FileInfo DownloadFile = new FileInfo(str2);
                //Response.Clear();
                //Response.ClearHeaders();
                //Response.Buffer = false;
                //Response.ContentType = "application/octet-stream ";
                //Response.AppendHeader("Content-Disposition ", "attachment;filename= " + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
                //Response.AppendHeader("Content-Length ", DownloadFile.Length.ToString());
                //Response.WriteFile(DownloadFile.FullName);
                //Response.Flush();
                //Response.End();