Hi,

 

For security reason,

 

Uploader must do that postback once to validate the uploaded file , via the uploader object in that page.

 

So it's not just for FileValidating event.

 

If you must doing something in Page_Load which is conflict with the uploader,

 

I suggest you move the code to Page's LoadComplete event.

 

Or you can use this code to determine whether the uploader is doing such postback:

 

   string validating;
   System.Collections.Specialized.NameValueCollection nvc;
   nvc=(System.Collections.Specialized.NameValueCollection)Context.Items["CuteWebUI.AjaxUploader.QueryString"];
   if(nvc!=null)
    validating=nvc["_UploadControlID"];
   else
    validating=Context.Request.QueryString["_UploadControlID"];
   if(!string.IsNullOrEmpty(validating))
       return;
   

Regards,

Terry