Question

您好我正在尝试使用EventToCommand我使用了棱镜库，但我遇到的问题很少，如下所述。

MyTestSwitch_1可以正常执行ToggledCommand，但是当我尝试点击基于listview项生成的MyTestSwitch_ListView时，它没有做任何事情都不会给任何异常应用程序不崩溃它只是忽略EventToCommand行为

有谁知道可能出错了什么。谢谢。

<StackLayout>
    <Switch x:Name="MyTestSwitch_1" IsToggled="{Binding ValueB}}">
        <Switch.Behaviors >
            <b:EventToCommandBehavior EventName="Toggled" 
                                      Command="{Binding ToggledCommand}"/>
    </Switch.Behaviors>
</Switch>

<ListView x:Name="MyListView"
        ItemsSource="{Binding ValuesList}"
        ItemTapped="Handle_ItemTapped"
        CachingStrategy="RecycleElement"

          HasUnevenRows="True"

        IsPullToRefreshEnabled="True"            
        RefreshCommand="{Binding RefreshCommand}"
        IsRefreshing="{Binding IsRefreshing, Mode=OneWay}"
          Margin="10">
    <ListView.Behaviors>
        <b:EventToCommandBehavior EventName="ItemTapped" 
                                  Command="{Binding ItemTappedCommand}"
                                  CommandParameter="MyParameter" />
    </ListView.Behaviors>

    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <StackLayout>
                    <Label Text="{Binding Id}" 
               Style="{DynamicResource ListItemTextStyle}" />
                    <Label Text="{Binding Value}" 
               Style="{DynamicResource ListItemDetailTextStyle}"/>
                    <Switch x:Name="MyTestSwitch_ListView" IsToggled="{Binding ValueB}}">
                        <Switch.Behaviors >
                            <b:EventToCommandBehavior EventName="Toggled" 
                                  Command="{Binding  ToggledCommand}, Source={x:Reference ThisPage}"
                                  CommandParameter="{Binding .}" />
                        </Switch.Behaviors>
                    </Switch>
                </StackLayout>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>

</ListView>

Answer 1

你好我终于在这个帖子找到了解决方案

https://forums.xamarin.com/discussion/84190/listview-binding-command

感谢NMackay

Xamarin EventToCommand切换为切换

1 个答案: