使用反射来确定控件是否支持事件

Question

为避免try-catch块，有没有办法确定控件是否支持指定的事件而没有try-catch块？

Dim d As [Delegate] = [Delegate].CreateDelegate(eventHandler.EventHandlerType, _
                                                                Me, _
                                                                "OnControlValueChanged") '<<

Answer 1

使用反射：

Dim events As System.Reflection.EventInfo() = GetType(Control).GetEvents()
For Each someEvent As System.Reflection.EventInfo In events
    If someEvent.Name = "OnControlValueChanged" Then
        'Do what you need to do
    End If
Next