Connect Multiple Events to Single Event in Windows Forms, C# & VB.NET

In today's article I will show you how you can connect or use one event to multiple controls in windows forms application using c#.net and VB.net. This article will demonstrate Use One Event Handler for Multiple Controls in WinForms (C# / VB.NET), Wire Multiple Events to a Single EventHandler in Windows Forms - C# & VB.NET, Handle Many Click Events with One Method in WinForms (C#.NET / VB.NET), Best Practices: Reuse a Single Event Handler for Multiple Controls in WinForms. 

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Now for this article first we will create a new windows application and add a form. In this form we will add few label and button controls to demonstrate the example. 

Now we will generate click event of button as shown in below code. In this code I have added code which I will attach to button 1 and button 2. As per object or button text I have captured the text value and displayed. 

C#.Net

public Form3()
{
    InitializeComponent();
    button1.Click += new System.EventHandler(button1_Click);
    button2.Click += new System.EventHandler(button1_Click);
}

private void button1_Click(object sender, EventArgs e)
{
    Button button = (Button)sender;
    lblButtonValue.Text = $"{button.Text}";
}
 

VB.Net

Public Sub New()
    InitializeComponent()
    AddHandler button1.Click, New System.EventHandler(AddressOf button1_Click)
    AddHandler button2.Click, New System.EventHandler(AddressOf button1_Click)
End Sub

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim button As Button = CType(sender, Button)
    lblButtonValue.Text = $"{button.Text}"
End Sub

Now we have done run the code to check the output.