WPF DataGrid RowDetails Visibility binding to a property (with XAML only)

Question

I have a DataGrid displaying bunch of Objects. Those objects have a property IsDetailsExpanded and I want to bind the DataRows DetailsVisibility property to that property.

My first approach works but requires some code-behind (which i would like to get rid of)

i handle the LoadingRow event

void LoadingRowHandler(object sender, DataGridRowEventArgs e)
{
    Binding b = new Binding()
    {
         Source = e.Row.DataContext,
         Path = new PropertyPath("IsExpanded"),
         Converter = (IValueConverter)Resources["BoolToVisi"],
         Mode = BindingMode.TwoWay
    };
    e.Row.SetBinding(DataGridRow.DetailsVisibilityProperty, b);
}

i think there has to be a way to achieve something similar in XAML but i unfortunately i have not the slightest clue. Any ideas? suggestions?

CodeNaked · Accepted Answer · 2011-07-20T20:27:59.353

22

You can use a Style for the DataGridRow type, like so:

<DataGrid Name="dataGrid1" Margin="12,12,0,0">
    <DataGrid.RowStyle>
        <Style TargetType="DataGridRow">
            <Setter Property="DetailsVisibility" Value="{Binding IsExpanded, Converter={StaticResource BoolToVisi}}" />
        </Style>
    </DataGrid.RowStyle>
</DataGrid>

edited Jul 20 '11 at 20:27

answered Jul 20 '11 at 20:20

CodeNaked

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Exactly. That's the xaml way. Only Property should be equal to DetailsVisibility. – Yiğit Yener Jul 20 '11 at 20:25
Sometimes i want to abuse this commenting feature and drop some random smileys around. Is it frowned upon: :))))) – Yiğit Yener Jul 20 '11 at 20:34
@Yiğit - Not sure, I haven't had any complaints. – CodeNaked Jul 20 '11 at 20:38
XAML hates me ... i placed that rowStyle but when i change the state of that property nothing seems to happen ... anything else a wpf newbie like me should have done? – DarkSquirrel42 Jul 20 '11 at 21:12
1

@DarkSquirrel42 - Are there any errors in your Output window? You may need to use `{Binding RelativeSource={RelativeSource Self}, Path=DataContext.IsExpanded, Converter={StaticResource BoolToVisi}}`, but I wouldn't think so. – CodeNaked Jul 21 '11 at 00:00
no exceptions in the output window, just modules beeing loaded, etc ... i tried what you suggested, but no luck ... creating the binding in the eventhandler works fine, so i assume i missed something trivial – DarkSquirrel42 Jul 21 '11 at 00:12
10

gnahahahahahaa ... *biting in the edge of the table* ... this can't work if the DataGrid has `RowDetailsVisibilityMode="Collapsed"` set ... – DarkSquirrel42 Jul 21 '11 at 00:27
6

As far as I can tell RowDetailsVisibilityMode overrides this binding regardless of what its value is set to. The binding is ignored. – xr280xr Jun 30 '14 at 16:14

WPF DataGrid RowDetails Visibility binding to a property (with XAML only)

1 Answers1