当用户单击它时,我需要折叠 WPF DataGrid 的详细信息行,并在他们再次单击时重新显示它。我还想使用单选保留 VisibleWhenSelected 的 DataGridRoDetailsVisibilityMode。
我根据其他地方的这篇文章提出了这个解决方案:http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/0a45b3a7-46d0-45a9-84b2-0062f07f6fec#eadc8f65-fcc6-41df-9ab9-8d93993e114c
private bool _rowSelectionChanged;
private void dgCompletedJobs_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
_rowSelectionChanged = true;
}
private void dgCompletedJobsMouseUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
DependencyObject dep = (DependencyObject)e.OriginalSource;
//navigate up the tree
while (dep != null &&
!(dep is DataGridCell) &&
!(dep is DataGridColumnHeader))
{
dep = VisualTreeHelper.GetParent(dep);
}
if (dep == null)
{
return;
}
DataGridCell dgc = dep as DataGridCell;
if (dgc != null)
{
//navigate further up the tree
while (dep != null && !(dep is DataGridRow))
{
dep = VisualTreeHelper.GetParent(dep);
}
DataGridRow dgr = dep as DataGridRow;
DataGrid dg = sender as DataGrid;
if (dg != null && dgr != null)
{
if (dgr.IsSelected && !_rowSelectionChanged)
{
dg.RowDetailsVisibilityMode =
(dg.RowDetailsVisibilityMode == DataGridRowDetailsVisibilityMode.VisibleWhenSelected)
? DataGridRowDetailsVisibilityMode.Collapsed
: DataGridRowDetailsVisibilityMode.VisibleWhenSelected;
}
else
{
dg.RowDetailsVisibilityMode = DataGridRowDetailsVisibilityMode.VisibleWhenSelected;
}
}
}
_rowSelectionChanged = false;
}
这似乎很好地解决了我的问题,但我怀疑这可以更简单、更优雅地完成,特别是因为我在这个项目上使用了 MVVM。但是,我认为这是事件驱动代码隐藏的可接受用法,因为它纯粹是表示逻辑。
有没有人有更清洁的解决方案?
最佳答案
要使用“正确”的 MVVM 执行此操作,您应该将 RowDetailsVisibilityMode 绑定(bind)到 View 模型上的属性:
<DataGrid x:Name="dgCompletedJobs" RowDetailsVisibilityMode="{Binding RowDetailsVisible}"/>
您的 View 模型属性将类似于:
private DataGridRowDetailsVisibilityMode _rowDetailsVisible;
public DataGridRowDetailsVisibilityMode RowDetailsVisible
{
get { return _rowDetailsVisible; }
set {
_rowDetailsVisible = value;
if (PropertyChanged != null) {
PropertyChanged(this, new PropertyChangedEventArgs("RowDetailsVisible"));
}
}
}
要将鼠标单击事件链接到属性的更改,您可以执行一些花哨的附加行为命令,如 here 所示。 ,或者只是使用后面的代码直接调用 View 模型(我经常为简单的任务自己这样做):
private void dgCompletedJobsMouseUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
Window1ViewModel viewModel = (Window1ViewModel)DataContext;
if (viewModel.RowDetailsVisible == DataGridRowDetailsVisibilityMode.Collapsed) {
viewModel.RowDetailsVisible = DataGridRowDetailsVisibilityMode.VisibleWhenSelected;
} else {
viewModel.RowDetailsVisible = DataGridRowDetailsVisibilityMode.Collapsed;
}
}
关于WPF datagrid 单击时折叠详细信息行,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13354603/