VB.Net/GUI/Button
Содержание
Add a Button to Frame Dynamically
<source lang="vbnet"> Imports System Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Globalization Imports System.Text Imports System.Collections Public Class MainClass
Shared Sub Main() Dim myform As Form = New Form1() Application.Run(myform) End Sub
End Class
Public Class Form1
" Declare the btnHi button WithEvents. Private WithEvents buttonHi As Button " Make the new buttonHi button. Private Sub btnMakeHiButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnMakeHiButton.Click buttonHi = New Button buttonHi.SetBounds(96, 50, 75, 23) buttonHi.Text = "Say Hi" Me.Controls.Add(buttonHi) End Sub " The user clicked the buttonHi button. Private Sub buttonHi_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles buttonHi.Click MessageBox.Show("Hi") End Sub Private Sub btnRemoveHiButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRemoveHiButton.Click Me.Controls.Remove(buttonHi) buttonHi = Nothing End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads 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.btnMakeHiButton = New System.Windows.Forms.Button Me.btnRemoveHiButton = New System.Windows.Forms.Button Me.SuspendLayout() " "btnMakeHiButton " Me.btnMakeHiButton.Location = New System.Drawing.Point(8, 8) Me.btnMakeHiButton.Name = "btnMakeHiButton" Me.btnMakeHiButton.Size = New System.Drawing.Size(112, 23) Me.btnMakeHiButton.TabIndex = 0 Me.btnMakeHiButton.Text = "Make Hi Button" " "btnRemoveHiButton " Me.btnRemoveHiButton.Location = New System.Drawing.Point(144, 8) Me.btnRemoveHiButton.Name = "btnRemoveHiButton" Me.btnRemoveHiButton.Size = New System.Drawing.Size(112, 23) Me.btnRemoveHiButton.TabIndex = 1 Me.btnRemoveHiButton.Text = "Remove Hi Button" " "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.btnRemoveHiButton) Me.Controls.Add(Me.btnMakeHiButton) Me.Name = "Form1" Me.Text = "Form1" Me.ResumeLayout(False) End Sub Friend WithEvents btnMakeHiButton As System.Windows.Forms.Button Friend WithEvents btnRemoveHiButton As System.Windows.Forms.Button
End Class
</source>
Button Paint Event
<source lang="vbnet"> Imports System Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Public Class MainClass
Shared Sub Main() Dim myform As Form = New OwnerDrawnButton() Application.Run(myform) End Sub
End Class
Public Class OwnerDrawnButton
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 "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 "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. Friend WithEvents button4 As System.Windows.Forms.Button <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.button4 = New System.Windows.Forms.Button() Me.SuspendLayout() " "button4 " Me.button4.Location = New System.Drawing.Point(40, 35) Me.button4.Name = "button4" Me.button4.Size = New System.Drawing.Size(200, 40) Me.button4.TabIndex = 2 Me.button4.Text = "button4" " "OwnerDrawnButton " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(280, 110) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.button4}) Me.Name = "OwnerDrawnButton" Me.Text = "OwnerDrawnButton" Me.ResumeLayout(False) End Sub
- End Region
Private Sub button4_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles button4.Paint Dim pen As Pen = New Pen(Color.Red, 2) e.Graphics.DrawRectangle(pen, 5, 5, button4.Width - 10, button4.Height - 10) End Sub
End Class
</source>
Change Button Font at Runtime
<source lang="vbnet"> Imports System Imports System.Collections Imports System.Data Imports System.IO Imports System.Xml.Serialization Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Drawing.Printing
Public Class MainClass
Shared Sub Main() Dim form1 As Form = New Form1() Application.Run(form1) End Sub
End Class
Public Class Form1
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 "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 Friend WithEvents Button1 As System.Windows.Forms.Button "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.Button1 = New System.Windows.Forms.Button() Me.SuspendLayout() " "Button1 " Me.Button1.Location = New System.Drawing.Point(72, 104) Me.Button1.Name = "Button1" Me.Button1.Size = New System.Drawing.Size(184, 48) Me.Button1.TabIndex = 0 Me.Button1.Text = "Click me to change my font" " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15) Me.ClientSize = New System.Drawing.Size(328, 168) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button1}) Me.Name = "Form1" Me.Text = "Changing the font on the button" Me.ResumeLayout(False) End Sub
- End Region
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim myFont As System.Drawing.Font myFont = New System.Drawing.Font("Arial", 12,FontStyle.Bold Or FontStyle.Italic) Me.Font = myFont Button1.Text = "My font was changed to this" End Sub
End Class
</source>
Set button background
<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Resources
Public Class OptionsDialog
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 "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 "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. Friend WithEvents okButton As System.Windows.Forms.Button Friend WithEvents changeColorButton As System.Windows.Forms.Button Friend WithEvents label1 As System.Windows.Forms.Label Friend WithEvents errorProvider1 As System.Windows.Forms.ErrorProvider Friend WithEvents colorDialog1 As System.Windows.Forms.ColorDialog Friend WithEvents _cancelButton As System.Windows.Forms.Button <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.okButton = New System.Windows.Forms.Button() Me.changeColorButton = New System.Windows.Forms.Button() Me._cancelButton = New System.Windows.Forms.Button() Me.label1 = New System.Windows.Forms.Label() Me.errorProvider1 = New System.Windows.Forms.ErrorProvider() Me.colorDialog1 = New System.Windows.Forms.ColorDialog() Me.SuspendLayout() " "okButton " Me.okButton.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right) Me.okButton.DialogResult = System.Windows.Forms.DialogResult.OK Me.okButton.Location = New System.Drawing.Point(32, 64) Me.okButton.Name = "okButton" Me.okButton.TabIndex = 5 Me.okButton.Text = "OK" " "changeColorButton " Me.changeColorButton.Location = New System.Drawing.Point(120, 8) Me.changeColorButton.Name = "changeColorButton" Me.changeColorButton.TabIndex = 4 Me.changeColorButton.Text = "Change..." " "_cancelButton " Me._cancelButton.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right) Me._cancelButton.CausesValidation = False Me._cancelButton.DialogResult = System.Windows.Forms.DialogResult.Cancel Me._cancelButton.Location = New System.Drawing.Point(120, 64) Me._cancelButton.Name = "_cancelButton" Me._cancelButton.TabIndex = 6 Me._cancelButton.Text = "Cancel" " "label1 " Me.label1.Location = New System.Drawing.Point(8, 8) Me.label1.Name = "label1" Me.label1.TabIndex = 3 Me.label1.Text = "Favorite Color" Me.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft " "errorProvider1 " Me.errorProvider1.DataMember = Nothing " "OptionsDialog " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(208, 102) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me._cancelButton, Me.label1, Me.okButton, Me.changeColorButton}) Me.Name = "OptionsDialog" Me.Text = "OptionsDialog" Me.ResumeLayout(False) End Sub
- End Region
Private Sub changeColorButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles changeColorButton.Click If colorDialog1.ShowDialog() = DialogResult.OK Then changeColorButton.BackColor = colorDialog1.Color End If End Sub Public Property FavoriteColor() As Color Get Return colorDialog1.Color End Get Set(ByVal Value As Color) changeColorButton.BackColor = Value colorDialog1.Color = Value End Set End Property Private Sub cancelButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles _cancelButton.Click End Sub Shared Sub Main() Dim myform As Form = New OptionsDialog() Application.Run(myform) End Sub
End Class
</source>
Simple Button action
<source lang="vbnet"> Imports System Imports System.Windows.Forms Class MyFirstForm
Inherits Form Private WithEvents mybutton As Button Public Sub New() Me.Text = "Hello, WinForms!" mybutton = New Button() mybutton.Text = "Click Me!" Me.Controls.Add(mybutton) End Sub Public Sub mybutton_Click(sender As Object, e As EventArgs) Handles mybutton.Click MessageBox.Show("Message") End Sub Shared Sub Main() Dim myform As Form = New MyFirstForm() Application.Run(myform) End Sub
End Class
</source>
Simple Button Click action
<source lang="vbnet"> Imports System.Windows.Forms
Module Module1
Sub Main() Application.Run(New Form1) End Sub
End Module
Public Class Form1
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 "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 "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. Friend WithEvents Button1 As System.Windows.Forms.Button Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.Button1 = New System.Windows.Forms.Button() Me.RichTextBox1 = New System.Windows.Forms.RichTextBox() Me.SuspendLayout() " "Button1 " Me.Button1.Location = New System.Drawing.Point(120, 272) Me.Button1.Name = "Button1" Me.Button1.TabIndex = 1 Me.Button1.Text = "Button1" " "RichTextBox1 " Me.RichTextBox1.Location = New System.Drawing.Point(32, 24) Me.RichTextBox1.Name = "RichTextBox1" Me.RichTextBox1.Size = New System.Drawing.Size(264, 232) Me.RichTextBox1.TabIndex = 2 Me.RichTextBox1.Text = "" " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(328, 309) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.RichTextBox1, Me.Button1}) Me.Name = "Form1" Me.Text = "ButtonDemo" Me.ResumeLayout(False) End Sub
- End Region
Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click MessageBox.Show("clicked") End Sub
End Class
</source>