Question

I’m new to WPF and I have some difficulties when I’m trying to populate a ListView with a list of custom objects.

internal class ApplicationCode
{
    public int Code { get; set; }

    public IEnumerable<string> InstrumentCodes { get; set; }
}

I have a list of ApplicationCode which I set to ItemsSource to a ListView. I need to display the ApplicationCode.Code as a string and for the rest of the columns a check box which can be checked/unchecked depending if the column name is contained in the InstrumentCodes collection.

In order to set the check box I use a converter on databinding:

<DataTemplate x:Key="InstrumentCodeTemplate">
  <CheckBox IsEnabled="False" IsChecked="{Binding Mode=OneTime, Converter={StaticResource InstrumentSelectionConverter}}" />
</DataTemplate>

The problem I have is because I can’t know which is the current column at the time of cell data binding and I can’t set the ConverterParameter.

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
  ApplicationCode appCode = value as ApplicationCode;

  return appCode != null && appCode.InstrumentCodes.Contains(parameter.ToString());
}

Small example:

    Id  | Code1 | Code3 | Code4
--------------------------------
    123 |  True | False | True

Data for row 1: ApplicationCode.InstrumentCodes {Code1, Code4}

There is a way to find out the column index or name? Or there is another way to solve this problem?

Answer 1

The solution I got so far is to add the columns dynamically and to set the ConverterParameter on every column.

foreach (var instrument in instruments)
{
    var column = new GridViewColumn
                        {
                            HeaderTemplate = GetColumnHeaderTemplate(instrument),
                            CellTemplate = GetColumnCellTemplate(instrument),
                            Header = instrument,
                        };

    view.Columns.Add(column);
}

private static DataTemplate GetColumnCellTemplate(string instrument)
{
    var binding = new Binding
    {
        ConverterParameter = instrument,
        Converter = new InstrumentSelectionConverter(),
        Mode = BindingMode.OneWay
    };

    var template = new DataTemplate();
    template.VisualTree = new FrameworkElementFactory(typeof(CheckBox));
    template.VisualTree.SetBinding(ToggleButton.IsCheckedProperty, binding);

    return template;
}

I know this isn’t the best solution and I would really appreciate if someone could show me a way to do this directly from .xaml.