WPF DataGrid切换选择模式& CellTemplate中的按钮 [英] WPF DataGrid toggle selection mode & Button in CellTemplate
问题描述
我正在构建POS应用程序,并且希望最终用户能够为数据网格(即I.E.)设置切换选择模式。他们可以单击多行,每个单击的项目将累积在SelectedItems属性上-也单击已选择的行将取消选择该行。我在另一个stackoverflow问题中找到了这段代码:
I'm building a POS application, and I want the end user to be able to have a toggle selection mode for the datagrid, I.E. they can click on multiple rows and each clicked item will accumulate on the SelectedItems property - also clicking on a row that was already selected will deselect the row. I found this code in another stackoverflow question:
<DataGrid.Resources>
<Style TargetType="{x:Type DataGridCell}">
<EventSetter Event="PreviewMouseLeftButtonDown" Handler="DoCheckRow" />
</Style>
</DataGrid.Resources>
public void DoCheckRow(object sender, MouseButtonEventArgs e)
{
DataGridCell cell = sender as DataGridCell;
if (cell != null && !cell.IsEditing)
{
DataGridRow row = VisualHelpers.TryFindParent<DataGridRow>(cell);
if (row != null)
{
row.IsSelected = !row.IsSelected;
e.Handled = true;
Debug.WriteLine(sender);
}
}
}
这实际上给了我想要切换到选择模式,但是,当我将按钮添加为CellTemplate时,单击按钮不会触发按钮命令,因为我正在设置 e.Handled = true; $ c上面的代码中的$ c>将停止事件气泡。
That effectively gives me what I want as far as the toggle selection mode, however, when I add a button as a CellTemplate, the buttons command isn't fired when clicked because I'm setting e.Handled = true;
in the above code which stops the event bubble. Is there a way that I can accommodate both?
推荐答案
我能够通过使用一些辅助函数来找到视觉效果,从而解决了这两种问题。孩子/父母和一些命中测试:
I was able to solve it by using some helper functions to find the visual child / parent and some hit testing:
public void DoCheckRow(object sender, MouseButtonEventArgs e)
{
DataGridCell cell = sender as DataGridCell;
if (cell != null && !cell.IsEditing)
{
DataGridRow row = VisualHelpers.TryFindParent<DataGridRow>(cell);
if (row != null)
{
Button button = VisualHelpers.FindVisualChild<Button>(cell, "ViewButton");
if (button != null)
{
HitTestResult result = VisualTreeHelper.HitTest(button, e.GetPosition(cell));
if (result != null)
{
// execute button and do not select / deselect row
button.Command.Execute(row.DataContext);
e.Handled = true;
return;
}
}
row.IsSelected = !row.IsSelected;
e.Handled = true;
}
}
}
不是最优雅的解决方案,但它可以与我使用的MVVM模式一起使用。
Granted its not the most elegant solution, but it works with the MVVM pattern that I use.
这篇关于WPF DataGrid切换选择模式& CellTemplate中的按钮的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!