The xamDataPresenter™ control updates its data source when a cell loses focus. If you enable support for the INotifyDataErrorInfo or IDataErrorInfo interface, your end users will not see any validation information while they are actively editing a cell’s value. Instead, they must move focus away from the cell in order to see validation information. However, you can also provide feedback as your end users type in a cell by handling xamDataPresenter’s CellChanged event and setting the cell’s value manually.
The following example code demonstrates how to validate data as your end users edit a cell.
In XAML:
<igDP:XamDataPresenter Name="xamDataPresenter1" CellChanged="xamDataPresenter1_CellChanged">
<igDP:XamDataPresenter.FieldLayoutSettings>
<igDP:FieldLayoutSettings SupportDataErrorInfo="RecordsAndCells" />
</igDP:XamDataPresenter.FieldLayoutSettings>
</igDP:XamDataPresenter>
In Visual Basic:
Imports Infragistics.Windows.DataPresenter.Events
...
Private Sub xamDataPresenter1_CellChanged( _
ByVal sender As Object, _
ByVal e As CellChangedEventArgs)
Dim val As Object = e.Editor.Value
If Not (TypeOf e.Cell.Record Is FilterRecord) Then
If DBNull.Value = val Then
val = Nothing
End If
e.Cell.Value = val
End If
End Sub
...
In C#:
using Infragistics.Windows.DataPresenter.Events;
...
private void xamDataPresenter1_CellChanged(object sender, CellChangedEventArgs e)
{
object val = e.Editor.Value;
if (!(e.Cell.Record is FilterRecord))
{
if (DBNull.Value == val)
val = null;
e.Cell.Value = val;
}
}
...