protected void Clear(object sender, EventArgs e)
 {
     ID.Text         = "";
     Name.Text       = "";
     Diploma.Text    = "";
     Tuition.Text    = "";
     IntTuition.Text = "";
     SchoolsList.ClearSelection();
 }
 protected void BindSchoolsList()
 {
     try
     {
         SchoolsController sysmgr = new SchoolsController();
         List <Schools>    info   = null;
         info = sysmgr.List();
         info.Sort((x, y) => x.SchoolName.CompareTo(y.SchoolName));
         SchoolsList.DataSource     = info;
         SchoolsList.DataTextField  = nameof(Schools.SchoolName);
         SchoolsList.DataValueField = nameof(Schools.SchoolCode);
         SchoolsList.DataBind();
         ListItem myitem = new ListItem();
         myitem.Value = "0";
         myitem.Text  = "select...";
         SchoolsList.Items.Insert(0, myitem);
         //CategoryList.Items.Insert(0, "select...");
     }
     catch (Exception ex)
     {
         ShowMessage(GetInnerException(ex).ToString(), "alert alert-danger");
     }
 }