ajax 文件下载

<script type="text/JavaScript">
        function DownLoad(strUrl) { 
            var form = $("<form>");   //定义一个form表单
            form.attr('style', 'display:none');   //在form表单中添加查询参数
            form.attr('target', '');
            form.attr('method', 'post');
            form.attr('action', "/QuestionInfo/DowmLoad");

            var input1 = $('<input>');
            input1.attr('type', 'hidden');
            input1.attr('name', 'strUrl');
            input1.attr('value', strUrl);
            $('body').append(form);  //将表单放置在web中 
            form.append(input1);   //将查询参数控件提交到表单上
            form.submit();

         }
    </script>

 

 

 

后台代码

方法1：

 #region 文档下载
        /// <summary>
        /// 文件下载函数
        /// </summary>
        /// <param name="fileUrl"></param>
        /// <returns></returns>
        [HttpPost]
        public void  DowmLoad(string strUrl)
        {
            try
            {
                string fullPathUrl = Server.MapPath(strUrl);//获取下载文件的路劲
                System.IO.FileInfo file = new System.IO.FileInfo(fullPathUrl);

                if (file.Exists)//判断文件是否存在
                {
                    Response.Clear();
                    Response.ClearHeaders();
                    Response.Buffer = false;
                    Response.AddHeader("content-disposition", "attachment;filename=" + file.Name);
                    Response.AddHeader("cintent_length", "attachment;filename=" + HttpUtility.UrlDecode(file.Name));
                    Response.AddHeader("cintent_length", file.Length.ToString());
                    Response.ContentType = "application/octet-stream";
                    Response.WriteFile(file.FullName);//通过response对象，执行下载操作
                    Response.Flush();
                    Response.End();
                    
                }
                
            }
            catch(Exception e)
            {
                Console.Write(e.ToString());
            }

        }

 

方法2：

MemoryStream ms = ExcelHelper.DataTableToExcel(dtlist);
ms.Seek(0, SeekOrigin.Begin);
return File(ms, "application/vnd.ms-excel", fileName);