Response.ContentType = "application/octet-stream";                        //通知浏览器下载文件而不是打开                        Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(model.Zlbt+"."+model.Zlhz, System.Text.Encoding.UTF8));                        Response.BinaryWrite(model.Zlwj);                        Response.Flush();                        Response.End();

model.Zlbt：文件名

model.Zlhz:文件后缀