в 16:40, 26 мая 2010

2010-05-26T16:40:30Z

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2010-05-26T12:57:16Z

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==A simple event handler==

<source lang="vbnet">Imports System.Windows.Forms
public class GenericEventHandler
public Shared Sub Main
Application.Run(New FrmSimple)
End Sub
End class

Public Class FrmSimple
Inherits System.Windows.Forms.Form
#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
End Sub " New
" 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 Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub " Dispose
Friend WithEvents lblOutput As System.Windows.Forms.Label
" Required by the Windows Form Designer
Private components As System.ruponentModel.Container
" 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.lblOutput = New System.Windows.Forms.Label()
Me.SuspendLayout()
"
"lblOutput
"
Me.lblOutput.Location = New System.Drawing.Point(16, 16)
Me.lblOutput.Name = "lblOutput"
Me.lblOutput.Size = New System.Drawing.Size(152, 80)
Me.lblOutput.TabIndex = 0
Me.lblOutput.Text = "Click Me!"
Me.lblOutput.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
"
"FrmSimple
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(176, 101)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.lblOutput})
Me.Name = "FrmSimple"
Me.Text = "SimpleEventExample"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub lblOutput_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles lblOutput.Click
MessageBox.Show("Label was clicked")
End Sub
End Class</source>

==Handle multiple event handlers from different controls==

<source lang="vbnet">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.rupilerServices.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.ruponentModel.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</source>

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VB.Net Tutorial/GUI/Control Event - История изменений

в 16:40, 26 мая 2010

Admin: 1 версия