WPF 通过 DataGrid 选择的行作为命令参数
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WPF pass DataGrid selected row as command parameter
提问by John Smith
- MainWindowViewModelhas a ViewCustomerCommand(string id)command that shows a customer by id
- MainWindow.xamlcontaining TabControl
- TabControl has a UserControl that contains DataGrid that is bind to Customers collection
| id | customer |
- MainWindowViewModel有一个ViewCustomerCommand(string id)命令，它按 id 显示客户
- 包含 TabControl 的MainWindow.xaml
- TabControl 有一个包含绑定到客户集合的 DataGrid 的 UserControl
| 身 | 客户 |
How do I pass "id" column in DataGrid selected row as a command parameter in MainWindow.xaml
如何将 DataGrid 选定行中的“id”列作为MainWindow.xaml 中的命令参数传递
MainWindow.xaml
<Button Command="{Binding ViewCustomerCommand}" CommandParameter="??? how to pass id of selected customer ???" />
回答by DHN
Well if you really need to expose the SelectedItemfrom within a UserControlwhy don't you extend it with such a property?
好吧，如果您真的需要SelectedItem从内部公开，UserControl为什么不使用这样的属性扩展它呢？
E.g.
例如
public class MyUserControl : UserControl
{
private static readonly SomeType SelectedItemProperty =
DependencyProperty.Register("SelectedItem", typeof(SomeType), typeof(MyUserControl));
public SomeType SelectedItem
{
get { return (SomeType)GetValue(SelectedItemProperty); }
set { SetValue(SelectedItemProperty, value); }
}
}
So now you can bind the SelectedItemof the DataGridin the UserControlto its SelectedItemproperty.
所以现在你可以绑定SelectedItem的DataGrid在UserControl它的SelectedItem属性。
<MyUserControl>
<DataGrid SelectedItem="{Binding SelectedItem,
RelativeSource={RelativeSource FindAncestor,
AncestorType={x:Type MyUserControl}}" />
</MyUserControl>
Now you only have to find a way to access the SelectedItemproperty in the TabItem. But I'm leaving that part to you.
现在，你只需要找到一种方法来访问SelectedItem的性能TabItem。但我要把那部分留给你。
Please note, that this is only an illustration of my idea and it may contain some small errors.
请注意，这只是我的想法的一个说明，它可能包含一些小错误。
