RoutedEvent"该成员未被识别或无法访问"

Question

我想使用一个自定义事件,而不是使用输入设备生成的事件,该事件将在我的xaml中作为EventTrigger在代码隐藏中以编程方式引发.
这应该是可笑的,但我无法在任何地方找到一个例子.

以下是我从学习WPF4 Unleashed第6章,路由事件实现,EventTrigger.RoutedEvent属性,自定义RoutedEvent作为EventTrigger以及其他许多内容中得出的结果:

MainWindow.xaml.cs:

namespace RoutedEventTrigger
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            RaiseEvent(new RoutedEventArgs(fooEvent, this));
        }
        public static readonly RoutedEvent fooEvent = EventManager.RegisterRoutedEvent(
        "foo", RoutingStrategy.Direct, typeof(RoutedEventHandler), typeof(MainWindow));

        // Provide CLR accessors for the event 
        public event RoutedEventHandler foo
        {
            add { AddHandler(fooEvent, value); }
            remove { RemoveHandler(fooEvent, value); }
        }
    }
}

MainWindow.xaml:

PS请温柔,我对WPF比较新.

Answer 1

Okuma Scott,

您是否尝试构建(重建)项目.WPF要求您构建项目,以便XAML解析器可以看到项目更改.使用下面的代码构建就好了.

码

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    public static readonly RoutedEvent fooEvent = EventManager.RegisterRoutedEvent("foo", RoutingStrategy.Direct, typeof(RoutedEventHandler), typeof(MainWindow));

    // Provide CLR accessors for the event 
    public event RoutedEventHandler foo
    {
        add { AddHandler(fooEvent, value); }
        remove { RemoveHandler(fooEvent, value); }
    }
}

XAML.

<Window x:Class="WpfApplication3.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication3"
        Title="MainWindow" Height="350" Width="525">
    <Window.Triggers>
        <EventTrigger RoutedEvent="local:MainWindow.foo" />
    </Window.Triggers>
</Window>

编辑:显示相同的解析器错误,直到重新构建项目.