void setRangeValidator_Click(object sender, EventArgs e)
        {
            Template template = Template.CreateGridTemplate(1);

            //Create one RangeValidator to validate whether the committed value is in range.
            RangeValidator rangValidator = new RangeValidator();
            //Set the RequiredType first, then set other Properties.
            rangValidator.RequiredType = typeof(int);
            rangValidator.MinValue = 5;
            rangValidator.MaxValue = 10;
            rangValidator.NullIsValid = false;

            LineNotify lineNotifyAction = new LineNotify();
            //When you end edit mode, the action is done (press Enter key)
            lineNotifyAction.DoActionReason = ValidateReasons.EndEdit;
            lineNotifyAction.LineColor = Color.Red;

            rangValidator.Actions.Add(lineNotifyAction);

            template.Row.Cells[0].Validators.Add(rangValidator);

            this.gcMultiRow1.Template = template;
            label.Text = "The RangeValidator's MinValue is 5, MaxValue is 10, input 4 (not in the range) in one cell, press 
Enter key to trigger validation (DoActionReason is EndEdit), a red underline is shown.";
        }