RoutedEvent 名称已使用

Question

在 WPF 中，我创建了 3 个用户控件“用户配置”、“系统配置”和“帐户配置”。所有这些用户控件都有“保存”和“取消”按钮。单击这些按钮后，它们会引发在各自的类中声明和定义的路由事件。单击“保存”按钮时会引发“ConfigurationSaved”事件，而单击“取消”按钮时会引发“ConfigurationCancelled”事件。

引发这些事件时，托管用户控件的容器将负责保存配置。

所有类的路由事件定义的代码片段如下：

帐户配置视图：

public partial class AccountConfigurationView : UserControl
{
    static AccountConfigurationView()
    {
        ConfigurationSavedEvent = EventManager.RegisterRoutedEvent("ConfigurationSaved",
        RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(AccountConfigurationView));

        ConfigurationClosedEvent = EventManager.RegisterRoutedEvent("ConfigurationClosed",
        RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(AccountConfigurationView));
    }

    #region ROUTED_EVENTS_RELATED
    public static readonly RoutedEvent ConfigurationSavedEvent;
    public static readonly RoutedEvent ConfigurationClosedEvent;

    public event RoutedEventHandler ConfigurationSaved
    {
        add { AddHandler(ConfigurationSavedEvent, value); }
        remove { RemoveHandler(ConfigurationSavedEvent, value); }
    }

    public event RoutedEventHandler ConfigurationClosed
    {
        add { AddHandler(ConfigurationClosedEvent, value); }
        remove { RemoveHandler(ConfigurationClosedEvent, value); }
    }
    #endregion
}

系统配置视图：

public partial class SystemConfigurationView : UserControl
{
    static SystemConfigurationView()
    {
        ConfigurationSavedEvent = EventManager.RegisterRoutedEvent("ConfigurationSaved",
        RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(SystemConfigurationView));

        ConfigurationClosedEvent = EventManager.RegisterRoutedEvent("ConfigurationClosed",
        RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(SystemConfigurationView));
    }

    #region ROUTED_EVENTS_RELATED
    public static readonly RoutedEvent ConfigurationSavedEvent;
    public static readonly RoutedEvent ConfigurationClosedEvent;

    public event RoutedEventHandler ConfigurationSaved
    {
        add { AddHandler(ConfigurationSavedEvent, value); }
        remove { RemoveHandler(ConfigurationSavedEvent, value); }
    }

    public event RoutedEventHandler ConfigurationClosed
    {
        add { AddHandler(ConfigurationClosedEvent, value); }
        remove { RemoveHandler(ConfigurationClosedEvent, value); }
    }
    #endregion
}

用户配置视图：

public partial class UserConfigurationView : UserControl
{
    static UserConfigurationView()
    {
        ConfigurationSavedEvent = EventManager.RegisterRoutedEvent("ConfigurationSaved",
        RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(UserConfigurationView));

        ConfigurationClosedEvent = EventManager.RegisterRoutedEvent("ConfigurationClosed",
        RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(UserConfigurationView));
    }

    #region ROUTED_EVENTS_RELATED
    public static readonly RoutedEvent ConfigurationSavedEvent;
    public static readonly RoutedEvent ConfigurationClosedEvent;

    public event RoutedEventHandler ConfigurationSaved
    {
        add { AddHandler(ConfigurationSavedEvent, value); }
        remove { RemoveHandler(ConfigurationSavedEvent, value); }
    }

    public event RoutedEventHandler ConfigurationClosed
    {
        add { AddHandler(ConfigurationClosedEvent, value); }
        remove { RemoveHandler(ConfigurationClosedEvent, value); }
    }
    #endregion
}

当我使用这些类时，我收到 TypeInitializationException 和以下消息：

已使用 OwnerType“baskcode.Admin.Controls.AccountConfigurationView”的 RoutedEvent 名称“ConfigurationSaved”。

如果我尝试加载任何其他控件，则会引发相同的异常。我无法纠正这个问题。请在这方面帮助我。

我正在使用.Net 版本 4

谢谢。

Answer 1

检查您的 EventManager.RegisterRoulatedEvent 参数。如果您从另一个文件复制并粘贴它，很容易忘记更改所有者类型。例如：

public class UserControlA
{
  public static readonly RoutedEvent ClickEvent =
    EventManager.RegisterRoutedEvent(
      "Click",
      RoutingStrategy.Bubble,
      typeof(RoutedEventHandler),
      typeof(UserControlA));
}

但随后您将其复制粘贴到另一个文件中。请注意下面错误的typeof(UserControlA)，它应该是typeof(UserControlB)。

public class UserControlB
{
  public static readonly RoutedEvent ClickEvent =
    EventManager.RegisterRoutedEvent(
      "Click",
      RoutingStrategy.Bubble,
      typeof(RoutedEventHandler),
      typeof(UserControlA));
}