protected void Page_Load(object sender, EventArgs e)
 {
     Page.Form.DefaultFocus  = TextBoxSearch.ClientID;
     Page.Form.DefaultButton = ButtonSearch.UniqueID;
     if (!IsPostBack)
     {
         string searchValue = "%";
         GridViewResult.DataSource = SecurityLevel.GetSecurityLevelListByFilter(searchValue);
         GridViewResult.DataBind();
     }
 }
 protected void ButtonSearch_Click(object sender, EventArgs e)
 {
     GridViewResult.DataSource = SecurityLevel.GetSecurityLevelListByFilter("%" + TextBoxSearch.Text + "%");
     GridViewResult.DataBind();
 }