在单击DataGridRow时在隐藏和显示RowDetails之间切换

<DataGrid>
    <DataGrid.RowDetailsTemplate>
        <DataTemplate>
            <!-- 在这里定义RowDetails的内容 -->
        </DataTemplate>
    </DataGrid.RowDetailsTemplate>
</DataGrid>

dataGrid.RowDetailsVisibilityChanged += DataGrid_RowDetailsVisibilityChanged;

private void DataGrid_RowDetailsVisibilityChanged(object sender, DataGridRowDetailsEventArgs e)
{
    if (e.DetailsElement.Visibility == Visibility.Visible)
    {
        // RowDetails当前可见，隐藏它
        e.DetailsElement.Visibility = Visibility.Collapsed;
    }
    else
    {
        // RowDetails当前隐藏，显示它
        e.DetailsElement.Visibility = Visibility.Visible;
    }
}