public static void Bind(XamlControl frameworkElement, string eventName, string methodPath, params object[] arguments)
{
var eventInfo = frameworkElement.GetType().GetEvent(eventName) ?? throw new MissingFieldException($"Cannot find \"{eventName}\" event");
var binding = new EventBinding(methodPath, arguments);
var handler = binding.Bind(frameworkElement, eventInfo);
eventInfo.AddEventHandler(frameworkElement, handler);
}
public Emitter(TypeBuilder typeBuilder, EventBinding eventBinding, XamlControl source)
{
_typeBuilder = typeBuilder;
_eventBinding = eventBinding;
_source = source;
_instanceField = _typeBuilder.DefineField("_instance", source.GetType(), FieldAttributes.Private);
_argumentsField = _typeBuilder.DefineField("_arguments", typeof(object[]), FieldAttributes.Private);
_timerField = _typeBuilder.DefineField("_timer", typeof(Timer), FieldAttributes.Private);
}
private EventInfo TryDetermineEventInfo(IServiceProvider serviceProvider, XamlControl frameworkElement)
{
var xamlContextField = serviceProvider.GetType().GetField("_xamlContext", BindingFlags.Instance | BindingFlags.NonPublic);
if (xamlContextField != null)
{
var xamlContext = xamlContextField.GetValue(serviceProvider);
var parentPropertyProp = xamlContext.GetType().GetProperty("ParentProperty");
var parentProperty = parentPropertyProp?.GetValue(xamlContext, null);
var nameProp = parentProperty?.GetType().GetProperty("Name");
if (nameProp != null)
{
var name = nameProp.GetValue(parentProperty, null).ToString();
return(frameworkElement.GetType().GetEvent(name));
}
}
return(null);
}