Intellisense 不适用于 MVVM 轻型工具包 [英] Intellisense doesn't work for MVVM light toolkit

问题描述

我昨天开始使用 MVVM 模式.但是为了处理事件，我需要安装 MVVM 轻型工具包.我这样做了，并将库添加到引用中.在 UserControl 我宣布了该库，但是当我想使用任何工具包时写它不显示任何建议，不接受我想写的内容并显示此错误无法将类型为 'EventToCommand' 的值添加到类型为 'TriggerActionCollection' 的集合或字典中"

I began to use MVVM pattern yesterday.But for working with events i needed to install MVVM light toolkit.I did that,and added library to references.At UserControl i announced that library,but when i want to use toolkit whatever i write it doesnt show any suggestions and doesnt accept what i want to write and shows this error "A value of type 'EventToCommand' cannot be added to a collection or dictionary of type 'TriggerActionCollection' "

<EventTrigger RoutedEvent="TextChanged">
   <mvvm:EventToCommand Command="{Binding Test}"/>
</EventTrigger>

`

推荐答案

你必须这样使用它..

You have to use it like this ..

要添加的命名空间:
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Loaded">
        <mvvm:EventToCommand Command="{Binding Path=UserControlLoadedCommand}" />
    </i:EventTrigger>
</i:Interaction.Triggers> 

不要忘记在您的项目中添加对 System.Windows.Interactivity 的引用

Dont forget to add a reference to System.Windows.Interactivity to your project

您需要在

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Loaded">
        <mvvm:EventToCommand Command="{Binding Path=UserControlLoadedCommand}" PassEventArgsToCommand="True" />
    </i:EventTrigger>
</i:Interaction.Triggers> 

然后你可以在 ViewModel ..... 你可能需要使用 Generic RelayCommand 作为

And then you can get that at ViewModel ..... you Might Need to use Generic RelayCommand as

RelayCommand<KeyEventArgs> myCommand= new RelayCommand<KeyEventArgs>(Execute,CanExecute)

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