多文件上载仅在第二次单击时有效 [英] Multiple file upload works only on second click

问题描述

我正在使用jquery.MultiFile.js在更新面板中使用fileupload控件上传多个文件，并使用触发器在按钮点击时回发但是在第一次单击时它只上传一个文件并开始上传多个文件，之后是我的代码

I am using jquery.MultiFile.js to upload multiple files using fileupload control in an update panel and using trigger to postback on button click but on first click it uploads only one file and starts uploading multiple files after that below is my code

HttpFileCollection fileCollection = Request.Files;
           for (int i = 0; i < fileCollection.Count; i++)
           {
               HttpPostedFile uploadfile = fileCollection[i];
               string file = Path.GetFileName(uploadfile.FileName);
               string extension = Path.GetExtension(file);
               if (uploadfile.ContentLength > 0)
               {
                   string no = Guid.NewGuid().ToString().Substring(0, 4);
                   string path = @"../Gallery/";
                   string serverpath = Server.MapPath(path);
                   string fullpath = serverpath + no + file;
                   uploadfile.SaveAs(fullpath);
                   valid += file + " saved successfully\\n";
               }

谢谢

Thanks

推荐答案

为文件上传控件提供UpdatePanel，并为导入按钮创建一个PostBackTrigger。

Provide the UpdatePanel for file Upload control and make a PostBackTrigger for Import button.

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