将UserControl气泡中的MouseDoubleClick事件中的e.handled = true设置为父控件

Question

I have developed a WPF application following MVVM pattern.

UserControl

It has a textBox control and I have hooked up MouseDoubleClick .

 private void textbox_MouseDoubleClick(object sender, MouseButtonEventArgs e)
    {                     
        e.Handled = true;
    }

Parent

<ListView>
       <i:Interaction.Triggers>
            <i:EventTrigger EventName="MouseDoubleClick">
                <i:InvokeCommandAction Command="{Binding DoubleClickCommand}"
                                       CommandParameter="{Binding data}" />
            </i:EventTrigger>
        </i:Interaction.Triggers>
</ListView>

The problem is that even after setting e.Handled = true, DoubleClickCommand is called in the main view. I want DoubleClickCommand not to be fired when e.Handled = true.

Any help would be great.

Answer 1

Just make sure to use the same DoubleClickCommand at in both the parent and the usercontrol, let's say this is your usercontrol :

<UserControl x:Class="WpfApp4.UserControl1"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:local="clr-namespace:WpfApp4"
         xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
         mc:Ignorable="d" 
         d:DesignHeight="450" d:DesignWidth="800" MouseDoubleClick="UserControl1_OnMouseDoubleClick">

<Grid>
   <TextBox Width="100" />
</Grid>

The Parent should look something like this:

<Window ... DataContext="{Binding ParentViewModel}" Name="Main">
<Grid>
    <ListView ItemsSource="{Binding ItemsCollection}">

        <ListView.ItemTemplate>
            <DataTemplate>
                <local:UserControl1>
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="MouseDoubleClick">
                            <i:InvokeCommandAction Command="{Binding DoubleClickCommand,ElementName=Main}"
                                               CommandParameter="{Binding data}" />
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </local:UserControl1>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</Grid>
</Window>

Now the Handled property will work just fine.