Handle multiple event handlers from different controls : Control Event « GUI « VB.Net Tutorial






Handle multiple event handlers from different controls
Imports System.Windows.Forms

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

Public Class Form1
    Private Sub MultipleEvents(ByVal sender As Object, _
            ByVal e As System.EventArgs) Handles _
            TextBox1.Enter, TextBox2.Enter, TextBox3.Enter, _
            TextBox1.TextChanged, TextBox2.TextChanged, TextBox3.TextChanged
        
        Dim activeControl As TextBox

        activeControl = CType(sender, TextBox)
        ShowInfo.Text = "TextField #" & _
            activeControl.Name & _
            ", " & activeControl.Text.Length & " character(s)"
    End Sub
End Class


<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial 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.TextBox1 = New System.Windows.Forms.TextBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.ShowInfo = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(120, 8)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(160, 20)
        Me.TextBox1.TabIndex = 1
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(8, 10)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(93, 13)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Text Box Field #1:"
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(8, 42)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(93, 13)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "Text Box Field #2:"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(120, 40)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(160, 20)
        Me.TextBox2.TabIndex = 3
        '
        'Label3
        '
        Me.Label3.AutoSize = True
        Me.Label3.Location = New System.Drawing.Point(9, 72)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(93, 13)
        Me.Label3.TabIndex = 4
        Me.Label3.Text = "Text Box Field #3:"
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(121, 70)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.Size = New System.Drawing.Size(159, 20)
        Me.TextBox3.TabIndex = 5
        '
        'Label4
        '
        Me.Label4.AutoSize = True
        Me.Label4.Location = New System.Drawing.Point(8, 104)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(62, 13)
        Me.Label4.TabIndex = 6
        Me.Label4.Text = "Information:"
        '
        'ShowInfo
        '
        Me.ShowInfo.AutoSize = True
        Me.ShowInfo.Location = New System.Drawing.Point(120, 104)
        Me.ShowInfo.Name = "ShowInfo"
        Me.ShowInfo.Size = New System.Drawing.Size(27, 13)
        Me.ShowInfo.TabIndex = 7
        Me.ShowInfo.Text = "N/A"
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(320, 136)
        Me.Controls.Add(Me.ShowInfo)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.TextBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "Sharing Control Logic"
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents ShowInfo As System.Windows.Forms.Label

End Class








14.74.Control Event
14.74.1.Handle multiple event handlers from different controlsHandle multiple event handlers from different controls
14.74.2.A simple event handlerA simple event handler