RadControls for Silverlight
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Converters can change data from one type to another. When you want to associate a value converter with a binding, you should create a class that implements the IValueConverter interface. The IValueConverter interface exposes two methods - Convert and ConvertBack.

A typical scenario where it makes sense to implement a data converter is when your data should be displayed differently, depending on a culture.

The following example shows you how to create a custom converter.

CopyC#
public class BackgroundConverter: IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        TimeSlot slot = value as TimeSlot;
        if (slot.Start == DateTime.Today)
            return  new SolidColorBrush(Colors.Red);
        return  new SolidColorBrush(Colors.White);
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        return null;
    }
}
CopyVB.NET
Public Class BackgroundConverter
    Implements IValueConverter

    Public Function Convert(ByVal value As Object, ByVal targetType As Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object
        Dim slot As TimeSlot = TryCast(value, TimeSlot)
        If slot.Start = DateTime.Today Then
            Return New SolidColorBrush(Colors.Red)
        End If
        Return New SolidColorBrush(Colors.White)
    End Function

    Public Function ConvertBack(ByVal value As Object, ByVal targetType As Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object
        Return Nothing
    End Function
End Class

See Also