WPF Datagrid选择\取消选择 [英] WPF Datagrid Select\Deselect

问题描述

大家好，

我在带有CheckBox列的WPF UserControl上有一个DataGrid. DataGrid绑定到UserControl的ViewModel中的ObservableCollection.我在UserControl的ViewModel中也有一个SelectedItem属性，DataGrid的SelectedItem属性绑定到该属性.

我要尝试实现的是，当您选择DataGrid的一行时，选中了CheckBox(显然SelectedItem在ViewModel中已更新).如果然后再次单击同一选定的行，则CheckBox应该变为未选中状态，但是选定的行不得设置为null. (因此Ctrl + Click对我不起作用)

如何获得DataGrid以意识到我已经选择"了已经选择的行?

希望有人对我有解决办法！

谢谢！

Hi all,

I have a DataGrid on a WPF UserControl with a CheckBox column. The DataGrid is bound to an ObservableCollection in the UserControl''s ViewModel. I also have a SelectedItem property in the UserControl''s ViewModel to which the SelectedItem property of the DataGrid is bound.

What I''m attempting to achieve is when you select a row of the DataGrid, the CheckBox get checked (and obviously the SelectedItem is updated in the ViewModel). If you then click on the same selected row a second time, the CheckBox should become unchecked, but the selected row must not be set to null. (so Ctrl+Click is not going to work for me)

How can I get the DataGrid to realise that I have "selected" a row which is already selected?

I hope someone has a solution for me!

Thanks!

推荐答案

没关系.设法自己解决了这个问题.

如果您想知道，请问我，尽管我最终使用的解决方案与我一直在寻找的解决方案有所不同.

Never mind. Managed to solve this on my own.

If you want to know how, ask me, albeit the solution I ended up using is a bit different to the solution i was looking for.

理论上，从纯粹的角度来看，这应该很容易实现关于您绑定到IsSelected的属性的使用.我要做的是包括这样的检查:

Theoretically this should be fairly easy to achieve based purely on the use of the property you have bound to for IsSelected. What I would do is include a check like this:

public bool IsSelected
{
  get { return isSelected; }
  set
  {
    if (isSelected || isSelected != value) return;
    isSelected = value;
    OnChanged("IsSelected");
  }
}

通过包括检查此行的isSelected是否已经为真，我们可以确保不对已设置的行进行尝试.

By including the check to see if isSelected is already true for this row, we can ensure that we don''t try to update the row if we have already set it.

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