Question

I’m creating a DataGrid where I set ItemsSource of the grid to a WCF request result. I have some null values for some strings, and I want to be able to enter values for those null values. I have no problems editing/saving pre-populated non-null values, but I can’t modify the values of cells which have been returned as null. How can I achieve this?

Answer 1

You can use a Converter in your Binding that converts the null value to an empty string. Here is some code for the converter:

public class NullToEmptyStringConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return value == null ? string.Empty : value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return value == string.Empty ? null : value;
    }
}