BeforeExitEditMode イベント

Private Sub UltraGrid1_BeforeExitEditMode( _
   ByVal sender As System.Object, _
   ByVal e As BeforeExitEditModeEventArgs) _
   Handles UltraGrid1.BeforeExitEditMode
   If Me.UltraGrid1.ActiveCell Is Nothing Then Return
   'Perform this action only on the "Bonus" column:
   If Me.UltraGrid1.ActiveCell.Column.Key <> "Bonus" Then Return
   'Make sure that a value exists
   If Me.UltraGrid1.ActiveCell.Text Is Nothing OrElse _
      Me.UltraGrid1.ActiveCell.Text = String.Empty Then Return
   Dim currentValue As Integer = _
      Integer.Parse(Me.UltraGrid1.ActiveCell.Text)
   Dim baseValue As Integer = _
      CType(Me.UltraGrid1.ActiveCell.Row.Cells("BaseValue").Value, Integer)
   If currentValue < baseValue Then
      Me.lblError.Text = "Current Value cannot be less than Base Value"
      e.Cancel = True
   End If
End Sub

private void ultraGrid1_BeforeExitEditMode(
   object sender, BeforeExitEditModeEventArgs e)
{
   if (this.ultraGrid1.ActiveCell == null) return;
   //Perform this action only on the "Bonus" column:
   if (this.ultraGrid1.ActiveCell.Column.Key != "Bonus") return;
   //Make sure that a value exists
   if (this.ultraGrid1.ActiveCell.Text == null
      || (this.ultraGrid1.ActiveCell.Text == string.Empty))return;
   int currentValue =
      int.Parse(this.ultraGrid1.ActiveCell.Text);
   int baseValue =
      (int)this.ultraGrid1.ActiveCell.Row.Cells["BaseValue"].Value;
   if (currentValue < baseValue)
   {
      this.lblError.Text =
         "Current Value cannot be less than Base Value";
      e.Cancel = true;
   }
}