Hi,

I'm setting the forecolor of of a field based on another field of the record using a IValueConverter only under the condition that the ShowColor field of the record is a string that can represents a Color. It goes like this:

<igDP:CellBinding Property="Foreground" Target="CellValuePresenter"
Binding="{Binding Path=DataItem.ShowColor, Converter={StaticResource colorToForeBrushConverter}}"/>

And the ColorToForeBrushConverter goes like this:

public class ColorToForeBrushConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is Color)
        {
            return new SolidColorBrush((Color)value);
        }
        else if (value is string)
        {
            string ColorString = (string)value;
            if (ColorString == "") //no specified Foreground
            {
                return Binding.DoNothing
            }
            else
            {
                return new SolidColorBrush((Color)(ColorConverter.ConvertFromString(ColorString)));
            }
        }
        return Binding.DoNothing
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {

       var color = new Color();
       if (value is SolidColorBrush)
       {
              color = (value as SolidColorBrush).Color;
       }
       return color;

    }
}

The problem is:

1. Does igDP:CellBinding support conditions?  Meaning to use the ColorToForeBrushConverter only If the DataItem.ShowColor !="".

2. If problem 1 cannot be achieved, ColorToForeBrushConverter returns Binding.DoNothing when DataItem.ShowColor is"" to avoid binding. And this overrides all theme based colors, the Foreground is always Black then. But I don't want it to be black, I want it still be theme specified color, which could vary with themes. How can I achieve this?

Thank you.