Project Button Click Simulator Event

Context: Build a console application that simulates a button with a Click event. Subscribers (e.g., a logger and a message box) will respond to the click.

Requirements

Create a Button class with a Click event (using EventHandler pattern).
Provide a SimulateClick() method that raises the event.
Create two subscriber classes: LoggingSubscriber and NotificationSubscriber.
Subscribe both to the button’s Click event.
Simulate clicks and observe output.

Complete Code

using System;

// Custom EventArgs (optional, but follows pattern)
public class ButtonClickEventArgs : EventArgs
{
    public DateTime ClickTime { get; set; }
    public string ButtonName { get; set; }
}

// Button class
public class Button
{
    public string Name { get; set; }

    // Event declaration using standard EventHandler<T>
    public event EventHandler<ButtonClickEventArgs> Click;

    public Button(string name) => Name = name;

    // Protected virtual method to raise the event
    protected virtual void OnClick(ButtonClickEventArgs e)
    {
        Click?.Invoke(this, e);
    }

    // Simulate a button click
    public void SimulateClick()
    {
        Console.WriteLine($"[{Name}] Button clicked!");
        var args = new ButtonClickEventArgs
        {
            ClickTime = DateTime.Now,
            ButtonName = Name
        };
        OnClick(args);
    }
}

// Subscriber 1: Logging
public class LoggingSubscriber
{
    public void Subscribe(Button button)
    {
        button.Click += OnButtonClick;
    }

    private void OnButtonClick(object sender, ButtonClickEventArgs e)
    {
        Console.WriteLine($"[LOG] Button '{e.ButtonName}' clicked at {e.ClickTime:HH:mm:ss}");
    }
}

// Subscriber 2: Notification
public class NotificationSubscriber
{
    public void Subscribe(Button button)
    {
        button.Click += OnButtonClick;
    }

    private void OnButtonClick(object sender, ButtonClickEventArgs e)
    {
        Console.WriteLine($"[NOTIFY] You clicked {e.ButtonName}!");
    }
}

// Main program
public class Program
{
    static void Main()
    {
        Console.WriteLine("=== Button Click Simulator with Events ===\n");

        // Create button
        Button myButton = new Button("Submit");

        // Create subscribers
        var logger = new LoggingSubscriber();
        var notifier = new NotificationSubscriber();

        // Subscribe
        logger.Subscribe(myButton);
        notifier.Subscribe(myButton);

        // Simulate clicks
        myButton.SimulateClick();
        Console.WriteLine();
        myButton.SimulateClick();
    }
}

Example Run

=== Button Click Simulator with Events ===

[Submit] Button clicked!
[LOG] Button 'Submit' clicked at 14:23:05
[NOTIFY] You clicked Submit!

[Submit] Button clicked!
[LOG] Button 'Submit' clicked at 14:23:06
[NOTIFY] You clicked Submit!

Real-world usage example

GUI frameworks: This project mimics how actual buttons work in WinForms, WPF, or MAUI. The Click event notifies multiple subscribers (e.g., update UI, save data, play sound).

Example: Windows Forms Button.Click event works exactly this way.

Project Button Click Simulator Event

Requirements

Complete Code

Example Run

Real-world usage example

Related sections