Question

我有一个带有RowDetailsTemplate中定义的按钮的DataGrid。问题是，当单击按钮时，DataGrid会使用第一次单击来选择行，因此您需要单击该按钮两次。

我已尝试过此处提供的解决方法：wpf RowDetailsTemplate focus：

XAML：

<DataGrid ItemsSource="{Binding SomeCollection}">
    <DataGrid.Resources>
        <Style TargetType="DataGridRow">
            <EventSetter Event="PreviewMouseLeftButtonDown" Handler="SelectRowDetails"/>
            <Setter Property="DetailsVisibility" Value="{Binding HasCanadet, Converter={StaticResource BoolToVis}}"/>Mode=OneWay}"/>
        </Style>
    </DataGrid.Resources>
    ...
    <DataGrid.RowDetailsTemplate>
        <DataTemplate>
             ...
             <Button Command="{Binding SomeCommand}" ... \>
             ...
        </DataTemplate>
    </DataGrid.RowDetailsTemplate>
    ...
<DataGrid>

代码背后：

private void SelectRowDetails(object sender, MouseButtonEventArgs e)
{
    var row = sender as DataGridRow;
    if (row == null)
    {
        return;
    }
    row.Focusable = true;
    row.Focus();

    var focusDirection = FocusNavigationDirection.Next;
    var request = new TraversalRequest(focusDirection);
    var elementWithFocus = Keyboard.FocusedElement as UIElement;
    if (elementWithFocus != null)
    {
        elementWithFocus.MoveFocus(request);
    }
}

这很好用，但我现在需要在DataGrid的行上检测双击事件。我这样做是通过将InputBindings添加到DataGrid并将SelectedItem作为命令参数传递：

...
<DataGrid.InputBindings>
    <MouseBinding MouseAction="LeftDoubleClick" Command="{Binding AnotherCommand}" CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=SelectedItem}" />
</DataGrid.InputBindings>
...

问题是只在RowDetails上检测到双击（这很好），但是双击行本身（不是）时检测不到。

有什么想法吗？感谢。

Answer 1

检查事件的来源是否为 DataGridDetailsPresenter

类型

private void SelectRowDetails(object sender, MouseButtonEventArgs e)
{
    if(e.Source is DataGridDetailsPresenter) // Like this
    {
        var row = sender as DataGridRow;
        if (row == null)
        {
            return;
        }
        row.Focusable = true;
        row.Focus();

        var elementWithFocus = Keyboard.FocusedElement as UIElement;
        if (elementWithFocus != null)
        {
            elementWithFocus.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
        }
    }            
}

DataGrid RowDetails中的按钮需要两个cliks，解决方法中断双击

1 个答案: