wpf 在 MVVM 中绑定事件并将事件参数作为命令参数传递

Bind event in MVVM and pass event arguments as command parameter

提问by Visakh V A

I wanted to bind an event with ViewModel.

我想用 ViewModel 绑定一个事件。

I used

我用了

clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity

clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity

and i used trigger for the same

我使用触发器相同

  <Canvas Grid.Row="2" Grid.Column="2" x:Name="InteractiveCanvas" Style="{StaticResource canvasChartStyle}" ClipToBounds="True" >
        <intr:Interaction.Triggers>
            <intr:EventTrigger EventName="MouseEnter">
                <intr:InvokeCommandAction Command="AppointmentEditing" />
            </intr:EventTrigger>
        </intr:Interaction.Triggers>
    </Canvas>

but I need event arguments to be used. Here am not able to get the same.

但我需要使用事件参数。这里无法得到相同的结果。

In wpf any possiblity is there to bind event and get event arguments ? With out ussing MVVM lite or PRISM.

在 wpf 中，有没有可能绑定事件并获取事件参数？不使用 MVVM lite 或 PRISM。

I just want to get the event arguments

我只想获取事件参数

回答by Ankit

You can do it by adding the DLL's:

您可以通过添加 DLL 来实现：

• System.Windows.Interactivitiy
• Microsoft.Expression.Interactions

• System.Windows.Interactivitiy
• Microsoft.Expression.Interactions

In your XAML:

在您的 XAML 中：

Use the CallMethodAction class.

使用 CallMethodAction 类。

Use the EventNameto call the event you want; then specify your Methodname in the MethodName.

使用EventName来调用您想要的事件；然后Method在MethodName.

<Window>
    xmlns:wi="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
    xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions">

    <wi:Interaction.Triggers>
        <wi:EventTrigger EventName="SelectionChanged">
            <ei:CallMethodAction
                TargetObject="{Binding}"
                MethodName="ShowCustomer"/>
        </wi:EventTrigger>
    </wi:Interaction.Triggers>
</Window>

In your ViewModel Code:

在您的 ViewModel 代码中：

public void ShowCustomer()
//The method must be public & can take 0 parameters or 2 parameters i.e.
//object sender & EventArgs args
{
    // Do something.
}

P.S: This is a real late response to the question but I hope it helps you.

PS：这是对问题的真正迟到的回答，但我希望它可以帮助您。

回答by Ankit

Should using CommandParameter ..It's all :)

应该使用 CommandParameter ..这一切:)

<Canvas Grid.Row="2" Grid.Column="2" x:Name="InteractiveCanvas" Style="{StaticResource canvasChartStyle}" ClipToBounds="True" >
        <intr:Interaction.Triggers>
            <intr:EventTrigger EventName="MouseEnter">
                <intr:InvokeCommandAction Command="{Binding AppointmentEditing}" CommandParameter="YourParameters" />
            </intr:EventTrigger>
        </intr:Interaction.Triggers>
    </Canvas>

回答by Peregrine

Take a look at the MVVM-Light framework. Their implementation of EventToCommand includes a PassEventArgsToCommand option.

看一看 MVVM-Light 框架。它们的 EventToCommand 实现包括 PassEventArgsToCommand 选项。

See this question, and this old blog postfrom Laurent Bugnion for more details.

有关更多详细信息，请参阅此问题以及Laurent Bugnion 的这篇旧博客文章。