<div id="uploadwindow" style="display: none;">     <form action="/ShopActivitys/ImportActivityItems" id="form1" name="form1" enctype="multipart/form-data" method="post" target="hidden_frame">         <table style="width: 300px;">             <tr>                 <td style="width: 80px; display: block;">选择文件：</td>                 <td>                     <input type="file" id="file" name="activityitemsfile" />                 </td>             </tr>         </table>         <input type="submit" value="上传文件" />         <iframe name='hidden_frame' id="hidden_frame" style='display: none'></iframe>     </form> </div>

var UploadFun = {     CallBack: function (msg) {         $.messager.alert('上传文件', msg, 'info');     } };

public void ImportActivityItems() {     string error = "导入成功";     try     {  var f = Request.Files["activityitemsfile"];  var fpath = Server.MapPath("/Upload/活动链接数据/");  if (!Directory.Exists(fpath))      Directory.CreateDirectory(fpath);  string fullfilename = fpath + DateTime.Now.ToFileTime() + f.FileName;  f.SaveAs(fullfilename);     }     catch (Exception ex)     {  Logger.Error(ex.ToString());  error = "导入过程中发生错误，请重试";     }     Response.Write("<script type=\"text/javascript\"> parent.UploadFun.CallBack(\"" + error + "\")</script>"); }