protected void btnDeletePdfFile_Click(object sender, EventArgs e)
 {
     SuccessStories ss = new SuccessStories();
     if (ss.DeletePdfFile(LangCode, GroupID))
     {
         ImageButton btnDeletePdfFile = this.DetailsViewEditItem.FindControl("btnDeletePdfFile") as ImageButton;
         if (btnDeletePdfFile != null)
         {
             btnDeletePdfFile.Visible = false;
         }
         Button b = this.DetailsViewEditItem.FindControl("PdfName") as Button;
         if (b != null)
         {
             b.Visible = false;
         }
     }
 }