CODEWITHSUNDEEP
c#wpf
Lawrence Vo
Lawrence Vo

Reputation: 187

WPF Specifying How Columns Are Generated When They Are Binded

I have a DataGrid that gets binded by various DataTables. The nullable boolean columns get converted into DataGridCheckboxColumn. is there a way to convert this to a text column that shows yes, no, not available?

Upvotes: 0

Views: 39

Answers (2)

nosale
nosale

Reputation: 818

If you wanna keep the auto generating behavior you can subscribe to the AutoGeneratingColumn event from the DataGrid and change the generated DataGridColumn

private void DataGrid_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    if (e.Column is DataGridCheckBoxColumn dataGridCheckBoxColumn)
    {
        Binding binding = (Binding)dataGridCheckBoxColumn.Binding;
        binding.Converter = new BooleanToStringConverter(); //Converter Klaus Gütter mentioned
        e.Column = new DataGridTextColumn()
        {
            Header = dataGridCheckBoxColumn.Header,
            Binding = binding
        };
    }
}

Upvotes: 1

Klaus Gütter
Klaus Gütter

Reputation: 12007

You could craete a value converter and specify it the binding as Converter.

public class BooleanToStringConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (targetType == typeof(string) && value is bool?)
        {
            var b = (bool?)value;
            if (!b.HasValue)
                return "not available";
            return b.Value ? "yes" : "no";
        }
        return value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        // implement it if you need two-way binding
        throw new NotImpementedException();
    }
}

In XML, create an instance of it in the Resources

<local:BooleanToStringConverter x:Key="BooleanToStringConverter" />

and add it to the binding

Binding={"Binding MyColumn, Converter={StaticResource BooleanToStringConverter}}"

Upvotes: 1

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