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";
        }
    }