在一个MainViewModel:一个MVVM的ViewModels的不接收我发送消息的消息
private void TextBoxKeyDownVMMethod(KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
MessengerInstance.Send<Messages.WebTab.NavigatingToPageArgs>(new NavigatingToPageArgs { UrlForNavigating = "http://stackoverflow.com/questions/11485897/viewmodel-doesnt-receive-message-in-mvvm-light" });
//GoToPageInSelectedTabVMCommand.Execute((object)null);
Keyboard.ClearFocus();
}
}
在其它一个我收到它:
public WebTabItemVievModel()
{
MessengerInstance.Register<NotificationMessage<Messages.WebTab.NavigatingToPageArgs>>(this, _MessageHandler_NavigatingToPage);
}
private void _MessageHandler_NavigatingToPage(NotificationMessage<NavigatingToPageArgs> args)
{
GoToPageCommand.Execute(args.Content.UrlForNavigating);
}
WebTabItemVievModel作为的ObservableCollection在构造函数中创建MainViewModel, 此集合是用于制表控件的ItemsSource
public MainViewModel()
{
WebTabItems = new ObservableCollection<WebTabItemVievModel>();
WebTabItemVievModel tabItem;
tabItem = ServiceLocator.Current.GetInstance<WebTabItemVievModel>();
tabItem.Header = "Empty tab";
WebTabItems.Add(tabItem);
tabItem = new WebTabItemVievModel { Header = "Empty tab" };
WebTabItems.Add(tabItem);
tabItem = new WebTabItemVievModel { Header = "Empty tab" };
WebTabItems.Add(tabItem);
tabItem = new WebTabItemVievModel() { AddNewTabOnTabHeaderClick =true};
WebTabItems.Add(tabItem);
}
WebTabItemVievModel都有自己的可视化用户控件,至极通过资源定义MainWindow.xaml绑定:
<Window.Resources>
<DataTemplate DataType="{x:Type vm:WebTabItemVievModel}" >
<v:WebTabItemContentViev></v:WebTabItemContentViev>
</DataTemplate>
</Window.Resources>
定位器已经拥有真正的参数,同时注册。它没有改变任何东西:
SimpleIoc.Default.Register<WebTabItemVievModel>(true);
SimpleIoc.Default.Register<MainViewModel>(true);
谁有任何想法为什么WebTabItemVievModels不接收消息?
你为什么处理的按键一个VM? – slugster
它只是测试的triger工作,消息肯定是发出。 –