CODEWITHSUNDEEP
wpfdatagridicommand
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Reputation: 124696

How to bind a Command to double-click on a row in DataGrid

I have developed a WPF UserControl that is intended to be used as a pick list as follows:

I want to expose a Command that will be executed when the user double-clicks on a row in the DataGrid. The container can then react to this by doing something with the SelectedItem in the DataGrid.

So far I've tried to handle the double-click as follows:

<DataGrid IsReadOnly="True">
    <DataGrid.InputBindings>
        <MouseBinding MouseAction="LeftDoubleClick" Command="... />
    </DataGrid.InputBindings>
...

However the double-click event still fires when the user clicks in the DataGrid header. I'd like to be able to limit it so that the Command is only executed when the double click is in the body of the DataGrid. Is there a declarative way to do this?

UPDATE

I'm just getting to grips with WPF and MVVM, and am really looking for guidance on how to implement low-level reusable components like this. Any general advice will also be gratefully received and upvoted. As it stands, I'm assuming I will want this UserControl to:

Upvotes: 9

Views: 18234

Answers (2)

Philip
Philip

Reputation: 39

You can simply put the DataGrid into a Grid and define your InputBindings in the Grid. In the canExecute-definition, you should check, if a row is selected. That works for the KeyBinding as well, for example a custom Delete-Command.

<Grid>
        <Grid.InputBindings>
            <MouseBinding MouseAction="LeftDoubleClick" Command="... />
        </Grid.InputBindings>
        <DataGrid IsReadOnly="True">
        ...
</Grid>

Upvotes: 2

brunnerh
brunnerh

Reputation: 184441

If code behind is not a problem:

<DataGrid.RowStyle>
    <Style TargetType="{x:Type DataGridRow}">
        <EventSetter Event="Loaded" Handler="Row_Loaded"/>
    </Style>
</DataGrid.RowStyle>

private void Row_Loaded(object sender, RoutedEventArgs e)
{
    var row = sender as DataGridRow;
    row.InputBindings.Add(new MouseBinding(MyCommands.MyCommand,
            new MouseGesture() { MouseAction = MouseAction.LeftDoubleClick }));
}

Upvotes: 10

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