What's the correct way to convert this event handler registration from C# to VB.net?

问题

I'm trying to port some code over from C# to VB.net and I am having trouble with a simple event handler.

C#:

hook.KeyPressed += new EventHandler<KeyPressedEventArgs>(hook_KeyPressed);

I've written it as such in VB.net:

AddHandler hook.KeyPressed, AddressOf hook_KeyPressed

But my conversion is missing any reference to KeyPressedEventArgs in the C# code and i'm not sure if I'm doing this right. Any help would be appreciated.

回答1:

Remember, that an event is a delegate. To subscribe to the event, the signature of the event handler must be the same as the delegate. As long as your method has the proper signature, you have done it right. Just ensure your event handler's EventArgs parameter is of the KeyPressedEventArgs type.

C#:

hook.KeyPressed += new EventHandler<KeyPressedEventArgs>(hook_KeyPressed);

New C# Syntax:

hook.KeyPressed += hook_KeyPressed;

VB.net

AddHandler hook.KeyPressed, AddressOf hook_KeyPressed

Handler in VB.net:

Sub hook_KeyPressed(ByVal sender As Object, ByVal e As KeyPressedEventArgs)
    'code here
End Sub

来源：https://stackoverflow.com/questions/28387577/whats-the-correct-way-to-convert-this-event-handler-registration-from-c-sharp-t