文件下载功能代码示例

 public void ProcessRequest(HttpContext context)

        {

            string name = context.Session["userName"].ToString();

            string downFileName = context.Request.Params["downFileName"];

            string url = context.Server.MapPath("~/DownloadFiles/" +name+"/"+ downFileName);

            context.Response.ContentType = "application/octet-stream";

            context.Response.AddHeader("content-disposition", "attachment;filename=" + downFileName);

            System.IO.FileInfo lFileInfo = new System.IO.FileInfo(url);

            context.Response.WriteFile(lFileInfo.FullName);

           

            context.Response.End();

            // 删除临时文件

           // File.Delete(url);

        }