protected void Page_Load(object sender, EventArgs e) { string linkID = string.IsNullOrEmpty(Request.QueryString["Id"]) ? "0" : Request.QueryString["Id"]; // Load language contents if (!IsPostBack) { contentId = int.Parse(linkID); t_LanguageTranslate content = languageBL.FindSingle(x => x.Id == contentId); // Vietnamese language zone if (content != null) { //txtControlId.Text = content.ControlId; txtContent.Text = content.Contents; txtNoted.Text = content.Noted; } // Required messgage warning //RequiredFieldValidator1.ErrorMessage = "** Required value"; RequiredFieldValidator2.ErrorMessage = "** Required value"; } }