Mega Code Archive
Add and remove event handler
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Imports System.Windows.Forms
public class AddRemoveEventHandler
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged
If RadioButton1.Checked Then
AddHandler Button1.Click, AddressOf ButtonHandler1
Else
RemoveHandler Button1.Click, AddressOf ButtonHandler1
End If
End Sub
Private Sub RadioButton2_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton2.CheckedChanged
If RadioButton2.Checked Then
AddHandler Button1.Click, AddressOf ButtonHandler2
Else
RemoveHandler Button1.Click, AddressOf ButtonHandler2
End If
End Sub
Private Sub ButtonHandler1(ByVal sender As System.Object, ByVal e As System.EventArgs)
MessageBox.Show("ButtonHandler1")
End Sub
Private Sub ButtonHandler2(ByVal sender As System.Object, ByVal e As System.EventArgs)
MessageBox.Show("ButtonHandler2")
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
RadioButton1.Checked = True
End Sub
End Class
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
Inherits System.Windows.Forms.Form
'Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing AndAlso components IsNot Nothing Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.RadioButton1 = New System.Windows.Forms.RadioButton
Me.RadioButton2 = New System.Windows.Forms.RadioButton
Me.Button1 = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'RadioButton1
'
Me.RadioButton1.AutoSize = True
Me.RadioButton1.Location = New System.Drawing.Point(8, 8)
Me.RadioButton1.Name = "RadioButton1"
Me.RadioButton1.Size = New System.Drawing.Size(99, 17)
Me.RadioButton1.TabIndex = 0
Me.RadioButton1.Text = "ButtonHandler1"
Me.RadioButton1.UseVisualStyleBackColor = True
'
'RadioButton2
'
Me.RadioButton2.AutoSize = True
Me.RadioButton2.Location = New System.Drawing.Point(8, 40)
Me.RadioButton2.Name = "RadioButton2"
Me.RadioButton2.Size = New System.Drawing.Size(99, 17)
Me.RadioButton2.TabIndex = 1
Me.RadioButton2.Text = "ButtonHandler2"
Me.RadioButton2.UseVisualStyleBackColor = True
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(152, 16)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(75, 23)
Me.Button1.TabIndex = 2
Me.Button1.Text = "Button1"
Me.Button1.UseVisualStyleBackColor = True
'
'Form1
'
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.RadioButton2)
Me.Controls.Add(Me.RadioButton1)
Me.Name = "Form1"
Me.Text = "AddRemoveHandler"
Me.ResumeLayout(False)
Me.PerformLayout()
End Sub
Friend WithEvents RadioButton1 As System.Windows.Forms.RadioButton
Friend WithEvents RadioButton2 As System.Windows.Forms.RadioButton
Friend WithEvents Button1 As System.Windows.Forms.Button
End Class
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