This symbol will cause some errors, we do not allow use it in file name. So we can add a warning to tell user do not use this symbol.   protected void

 

Uploader1_FileUploaded(object sender, UploaderEventArgs args)
{
      if (args.FileName.IndexOf("_x27_") > -1)
      {
            ClientScript.RegisterClientScriptBlock(this.GetType(), "showerror", "<script>alert(' file name contains disable characters')</" +                  "script>");
            args.Delete();
      }
      else
      {  
            args.CopyTo("~/photo/" + args.FileName);
      }
}

 

 

Regards,

Eric