Make your tailored event registration page for C# developers

Custom Events in C# Example. Step 1: Create a custom class named EmployeeArgs. Step 2: Create a Listener class for our custom event. Our handler will call the function ShowEmployees as in the following: Step 3: Create an Employee Class. Step 4: Construct the main class. Output.

To create an event handler: Open some form of your C# application for editing. Drop the Event control on the form. Select the Event control on the form and open the Properties window. Switch to the Events page of the window and double-click the desired event. Visual Studio will create the event handler function.

Use event keyword with delegate type variable to declare an event. Use built-in delegate EventHandler or EventHandler for common events. The publisher class raises an event, and the subscriber class registers for an event and provides the event-handler method.

An event may be declared as a static event by using the static keyword. This makes the event available to callers at any time, even if no instance of the class exists. For more information, see Static Classes and Static Class Members. An event can be marked as a virtual event by using the virtual keyword.

From the Class Name drop-down list at the top of the Code Editor, select the object that you want to create an event handler for. From the Method Name drop-down list at the top of the Code Editor, select the event. Visual Studio creates the event handler and moves the insertion point to the newly created event handler.

I will explain how to write a event handler for button control using C#. Step:1: Create a web application as File-New -Project : Step 2: Go to the design view and add a button control as: Step 3: Select the button and right click and click on properties. In the properties window click the yellow icon event.

Creating a Custom Event: We create an event using the Event constructor. We listen to this event using the addEventListener() method. We trigger or dispatch the event using element. dispatchEvent(eventName) method. A custom Event named start has now been created.

Name the method which raises an event prefixed with On with the event name. The signature of the handler method must match the delegate signature. Register with an event using the += operator. Unsubscribe it using the -= operator.