Use one method to handle more than one RadioButton click event : Event « Event « VB.Net Tutorial

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VB.Net Tutorial » Event » Event 




Use one method to handle more than one RadioButton click event
Imports System.Windows.Forms

public class HandlerMoreThanOneRadioButtonEventWithOneMethod
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
    Inherits System.Windows.Forms.Form

    Dim radioButtons(4As RadioButton
    Dim selectedOption As Integer = 0

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call
        radioButtons(0= RadioButton1
        radioButtons(1= RadioButton2
        radioButtons(2= RadioButton3
        radioButtons(3= RadioButton4
        radioButtons(4= RadioButton5
    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is NothingThen
                components.Dispose()
            End If
        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.
    Friend WithEvents RadioButton1 As System.Windows.Forms.RadioButton
    Friend WithEvents RadioButton2 As System.Windows.Forms.RadioButton
    Friend WithEvents RadioButton3 As System.Windows.Forms.RadioButton
    Friend WithEvents RadioButton4 As System.Windows.Forms.RadioButton
    Friend WithEvents RadioButton5 As System.Windows.Forms.RadioButton
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()Private Sub InitializeComponent()
        Me.RadioButton1 = New System.Windows.Forms.RadioButton
        Me.RadioButton2 = New System.Windows.Forms.RadioButton
        Me.RadioButton3 = New System.Windows.Forms.RadioButton
        Me.RadioButton4 = New System.Windows.Forms.RadioButton
        Me.RadioButton5 = New System.Windows.Forms.RadioButton
        Me.Label1 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'RadioButton1
        '
        Me.RadioButton1.Location = New System.Drawing.Point(11864)
        Me.RadioButton1.Name = "RadioButton1"
        Me.RadioButton1.TabIndex = 0
        Me.RadioButton1.Text = "RadioButton1"
        '
        'RadioButton2
        '
        Me.RadioButton2.Location = New System.Drawing.Point(11888)
        Me.RadioButton2.Name = "RadioButton2"
        Me.RadioButton2.TabIndex = 1
        Me.RadioButton2.Text = "RadioButton2"
        '
        'RadioButton3
        '
        Me.RadioButton3.Location = New System.Drawing.Point(118112)
        Me.RadioButton3.Name = "RadioButton3"
        Me.RadioButton3.TabIndex = 2
        Me.RadioButton3.Text = "RadioButton3"
        '
        'RadioButton4
        '
        Me.RadioButton4.Location = New System.Drawing.Point(118136)
        Me.RadioButton4.Name = "RadioButton4"
        Me.RadioButton4.TabIndex = 3
        Me.RadioButton4.Text = "RadioButton4"
        '
        'RadioButton5
        '
        Me.RadioButton5.Location = New System.Drawing.Point(118160)
        Me.RadioButton5.Name = "RadioButton5"
        Me.RadioButton5.TabIndex = 4
        Me.RadioButton5.Text = "RadioButton5"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(4024)
        Me.Label1.Name = "Label1"
        Me.Label1.TabIndex = 5
        Me.Label1.Text = "Label1"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(513)
        Me.ClientSize = New System.Drawing.Size(292266)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.RadioButton5)
        Me.Controls.Add(Me.RadioButton4)
        Me.Controls.Add(Me.RadioButton3)
        Me.Controls.Add(Me.RadioButton2)
        Me.Controls.Add(Me.RadioButton1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub RadioButton1_CheckedChanged_
            ByVal sender As System.Object, _
            ByVal e As System.EventArgs_
            Handles RadioButton1.CheckedChanged, _
                    RadioButton2.CheckedChanged, _
                    RadioButton3.CheckedChanged, _
                    RadioButton4.CheckedChanged, _
                    RadioButton5.CheckedChanged
        Dim As Integer = 0
        Dim found As Boolean = False
        While i < And Not found
            If radioButtons(i).Checked Then
                found = True
                selectedOption = i + 1
                Label1.Text = CStr(selectedOption)
            End If
            i += 1
        End While
    End Sub

End Class














11.1.Event
11.1.1.Raise Events
11.1.2.Multiple Event Handler
11.1.3.Event handler
11.1.4.Subclass EventArgs to create your own event arguments
11.1.5.Inherit Event
11.1.6.Custom event handler
11.1.7.WithEvents and Event method
11.1.8.Add and remove event handlerAdd and remove event handler
11.1.9.Handle events from more than one componentsHandle events from more than one components
11.1.10.Add, remove event handler to/from ToggleButtonAdd, remove event handler to/from ToggleButton
11.1.11.Use one method to handle more than one RadioButton click eventUse one method to handle more than one RadioButton click event
11.1.12.Get event sender typeGet event sender type
11.1.13.Instantiating the Action<(Of <(T>)>) delegate rather than explicitly defining a new delegate and assigning a named method
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