ASP.Net OnClick vs Function() Handles buttonName.Click
asp.net
Solution
At the least, in the first option, the generated class for the .aspx page is responsible for wiring up the event handler (and thus, requires the event handler to be `Protected`); whereas, in the second option, the codebehind class is responsible for wiring up the event handler (so the event handler can be `Private`).
I'm not familiar with how exactly the `Handles` keyword is implemented in VB.NET, but it may also affect the timing of the wire-up (I know that wiring up an event in a codebehind's `OnInit` method will wire up the method at a different time in the page cycle than wiring it up through the markup, and a few obscure cases where that matters).
I, personally, prefer using the `Handles` method (or using `+=` in C# in the `OnInit` override). This allows the compiler to verify that the methods exist and don't have to be unnecessarily exposed to inheriting classes. Being compiled also helps when using refactoring tools, looking up usages, etc.
Problem
What is the difference between using the OnClick attribute of an ASP.Net Button: `<asp:Button ID="btn" runat="server" Text="New" OnClick="enterFunctionHere" />` vs. using the event directly in the function: `Sub addNew() Handles btn.Click` Thanks! UPDATE If I can do both in VB, which is better? Are they equal?