我正在尝试订阅由类似 WPF GridView 的第 3 方组件公开的所有事件,以便进行一些调试。除了建议这可能不是调试它的最佳方法以及类似的东西之外,我想知道这是否可以完成。
对于路由事件,它可以像这样工作:
var type = tree.GetType();
do
{
var staticFields = type.GetFields(BindingFlags.Static | BindingFlags.Public);
foreach (var staticField in staticFields)
{
if (typeof(RoutedEvent).IsAssignableFrom(staticField.FieldType))
{
tree.AddHandler((RoutedEvent)staticField.GetValue(null), new RoutedEventHandler(OnRoutedEvent), true);
}
}
} while ((type = type.BaseType) != typeof(object)/* && type.FullName.StartsWith("Telerik")*/);
public void OnRoutedEvent(object sender, System.Windows.RoutedEventArgs e)
{
Debug.WriteLine(e.RoutedEvent.ToString());
}
但是,对于典型事件,这似乎不起作用:
var evts = tree.GetType().GetEvents();
foreach (var ev in evts)
{
ev.AddEventHandler(this, new EventHandler(OnEvent));
}
public void OnEvent(object sender, EventArgs e)
{
//..
}
因为它不喜欢委托是 EventHandler 而不是专门的类型,或者因为事件处理程序方法的签名不包含专门的 EventArgs 类类型。
这可以以某种方式完成吗?
------------ 稍后编辑 --------- 在所有三种情况下(我的尝试,ds27680 的建议和 Thomas Levesque 的建议),AddEventHandler 调用都失败了:
System.Reflection.TargetException occurred
Message=Object does not match target type.
Source=mscorlib
StackTrace:
at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.EventInfo.AddEventHandler(Object target, Delegate handler)
at Test.MainWindow..ctor() in c:\users\me\documents\visual studio 2010\Projects\Test\Test\MainWindow.xaml.cs:line 39
我想事件处理程序方法的签名与 EventArgs 类型不完全匹配的事实是它失败的原因......