public void BindGrid()
 {
     try
     {
         user_dll = new UsersDLL();
         DataTable dt = user_dll.GetAllUsersAccess();
         if (dt.Rows.Count > 0)
         {
             ViewState["UserAccessData"] = dt;
             grvUserAccess.DataSource    = dt;
             grvUserAccess.DataBind();
         }
         else
         {
             ShowEmptyGrid();
         }
     }
     catch (Exception ex)
     {
         ErrorMessage("Grid Binding Error:1 " + ex.Message);
     }
 }