将数据绑定的WPF ListView中的MouseBindings添加到项目中 [英] Adding MouseBindings to Items in a databound WPF ListView

问题描述

当用户点击ListView中的项目时，我试图在我的ViewModel中获取一个命令。当我在XAML中添加一个 ListViewItem 时，我可以添加一个 MouseBinding 到它的 InputBindings 。

I'm trying to get a command in my ViewModel executed when the user clicks on a item in a ListView. When I add a ListViewItem in XAML I can just add a MouseBinding to its InputBindings.

<ListView>
<ListView.View>
   <GridView>
      <GridViewColumn Header="Test" />
   </GridView>
   </ListView.View>
   <ListViewItem Content="Item 1" >
      <ListViewItem.InputBindings>
         <MouseBinding Gesture="LeftDoubleClick" Command="{Binding DoubleClickCommand}" />
      </ListViewItem.InputBindings>
 </ListViewItem>
 </ListView>

但是如何才能在数据绑定的ListView中获得？

But how can this be achived in a databound ListView?

<ListView ItemsSource="{Binding Patients}">
<ListView.View>
    <GridView>
        <GridViewColumn Header="Test" />
    </GridView>
    <!-- How to set the MouseBinding for the generated ListViewItems?? -->
</ListView.View>

我已经得到一个解决方案定义 ListViewItem 样式并替换 ListViewItem 的 ControlTempalte 。虽然，我希望有一个更容易的解决方案。

I already got a solution by defining ListViewItem style and replacing the ControlTempalte of the ListViewItem. Though, I hope there is an easier solution.

真诚，
Michael

Sincerely, Michael

推荐答案

使用样式替换 ListViewItem 上的 ControlTemplate 不是一个坏的解决方案。实际上，这可能是我的第一选择。

Replacing the ControlTemplate on ListViewItem using a style is not a bad solution. In fact, it would probably be my first choice.

另一种完成同样类型的方式是在您的 ListViewItem style：

Another way of accomplishing the same kind is to use a custom attached property on your ListViewItem style:

<Style TargetType="ListViewItem">
  <Setter Property="local:AddToInputBinding.Binding">
    <Setter.Value>
      <MouseBinding Gesture="LeftDoubleClick" Command="{Binding DoubleClickCommand}" />    
    </Setter.Value>
  </Setter>
  ...

为此，您需要创建MyBindingHandler.AddBinding附加属性：

To do this you need to create the MyBindingHandler.AddBinding attached property:

public class AddToInputBinding
{
  public static InputBinding GetBinding(... // create using propa snippet
  public static void SetBinding(...
  public static readonly DependencyProperty BindingProperty = DependencyProperty.RegisterAttached(
    "Binding", typeof(InputBinding), typeof(AddToInputBinding), new PropertyMetadata
  {
    PropertyChangedCallback = (obj, e) =>
    {
      ((UIElement)obj).InputBindings.Add((InputBinding)e.NewValue);
    }
  }));
}

这可以扩展为处理多个绑定，但你得到这个想法：这个类允许你添加一个InputBinding里面的任何样式。

This could be expanded to handle multiple bindings, but you get the idea: This class allows you to add an InputBinding inside any style.

这个解决方案可能比你在做什么，因为直接定义了DoubleClick绑定在ListBoxItem上没有在其模板中的另一个控件上。但我认为这主要归结于个人喜好。

This solution may be preferable over what you're doing because the DoubleClick binding is defined directly on the ListBoxItem not on another control inside its template. But I think it mostly just comes down to personal preference.

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