Azavea.NijPredictivePolicing.AcsAlchemistGui.MainForm.cboYear_Validating C# (CSharp) Method

        private void cboYear_Validating(object sender, CancelEventArgs e)
        {
            //this can be set to a bad value during a job load
            string errMessage = string.Empty;

            bool valid = !string.IsNullOrEmpty(cboYear.SelectedValue as string);
            if (!valid)
            {
                errMessage = "Please select a year from the list";
            }

            this.errorProvider1.SetError(this.cboYear, errMessage);
        }