Exposing events from a custom control

When you build any custom control, you need to expose additional events, based on the child controls and functionality that you want to expose to the user. In this recipe, we will learn how to expose a custom event from a custom control and perform a specific operation using it.

Getting ready

Let's start with the existing project that we have already used in the previous recipes. Launch the IDE and open the CH05.SearchControlDemo project inside Visual Studio.

How to do it...

In this recipe, we will create a public event from the SearchControl, so that we can subscribe to the PART_Button button event and fetch the user-entered text. To do so, follow perform the following steps:

1. From Solution Explorer, create a new class named SearchEventArgs, inside the project.
2. Extend the SearchEventArgs class from the EventArgs and expose a public property (SearchTerm) of type string. Here's the class implementation:

public class SearchEventArgs : EventArgs 
{ 
    public...