WPF交互触发器CallMethodAction [英] WPF Interaction Trigger CallMethodAction

问题描述

我在View部分的给定代码中使用了事件触发器，如下所示。几乎所有绑定都可以通过ViewModel类-MainWindowViewModel正确地进行，但是对于方法 CustomRibbonWindow_Loaded，它的抛出运行时异常如下：

I have Used Event Trigger in my View part given code as below. Almost all bindings are properly with ViewModel class - MainWindowViewModel, but for the method "CustomRibbonWindow_Loaded", its throwing runtime exception like :

类型为System的异常。 ArgumentException发生在Microsoft.Expression.Interactions.dll中，但未在用户代码
中处理。其他信息：在与预期签名匹配的类型 MainWindow的对象上找不到名为 CustomRibbonWindow_Loaded的方法。
如果有用于此异常的处理程序，则该程序可以安全地继续。

我尝试将 TargetObject = {Binding ElementName = RR} 以及 TargetObject = {Binding} 。但是似乎没有任何作用。

I have tried putting putting TargetObject="{Binding ElementName=RR}" as well as TargetObject="{Binding}" also. But none of seems working.

我在VM中的方法如下：

My method way in VM is as below,

private void CustomRibbonWindow_Loaded()
    {
       ...
    }

请指导如何解决。

<i:Interaction.Triggers>
    <i:EventTrigger EventName="Loaded">
        <si:CallMethodAction MethodName="CustomRibbonWindow_Loaded"/>
    </i:EventTrigger>

</i:Interaction.Triggers>

MainWindow.xaml

<custom:CustomRibbonWindow x:Class="gDispatchApp.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:Fluent="clr-namespace:Fluent;assembly=Fluent"
    xmlns:custom="clr-namespace:gDispatchAppLib.Helpers.CustomUIControls;assembly=gDispatchAppLib"
    xmlns:DockUI="clr-namespace:DockingLibrary;assembly=DockingLibrary"
    xmlns:UserControls="clr-namespace:gDispatchAppLib.View.UserControls;assembly=gDispatchAppLib"
    xmlns:AppWindows="clr-namespace:gDispatchAppLib.View.AppWindows;assembly=gDispatchAppLib"
    xmlns:VM="clr-namespace:gDispatchAppLib.ViewModel.AppWindows;assembly=gDispatchAppLib"
    xmlns:VM2="clr-namespace:gDispatchAppLib.ViewModel;assembly=gDispatchAppLib"
    xmlns:PE="clr-namespace:gDispatchAppLib.ViewModel.CADQueues;assembly=gDispatchAppLib"
    xmlns:wpfHelper="clr-namespace:gDispatchAppLib.WPFHelpers;assembly=gDispatchAppLib"   
    xmlns:conv="clr-namespace:gDispatch.MvvmValidation.WPF;assembly=gDispatch.MvvmValidation"
    xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
    xmlns:si="http://schemas.microsoft.com/expression/2010/interactions"

     Title="SERIS CAD"
      MinHeight="300"
                       WindowState="Maximized" HorizontalContentAlignment="Stretch"
    FlowDirection="LeftToRight" CaptionHeight="50"
                 IsIconVisible="False" WindowStyle="SingleBorderWindow"
                       xmlns:my="clr-namespace:System;assembly=mscorlib" 
                       x:Name="RR">
<i:Interaction.Triggers>
    <i:EventTrigger EventName="Loaded">
        <si:CallMethodAction MethodName="CustomRibbonWindow_Loaded" TargetObject="{Binding ElementName=RR}"/>
    </i:EventTrigger>     
</i:Interaction.Triggers>

   ...

</custom:CustomRibbonWindow>

推荐答案

您的方法订阅是这样的。

Do your method subscription like this.

private void Window_Loaded(object sender, RoutedEventArgs e) 
// add the proper parameters
{
    // code here
}  

这里是文档：链接

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