VB.Net/GUI/Paint Mode
Invalidate only the area where the image will be drawn
<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Drawing.Imaging Public Class MainClass
Shared Sub Main() Dim form1 As Form1 = 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 "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() " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 273) Me.Name = "Form1" Me.Text = "Form1" End Sub
- End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load End Sub Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim Bmp As Bitmap = New Bitmap("figure2.bmp") Dim BMPContainer As RectangleF Dim G As Graphics = Me.CreateGraphics() Dim GU As GraphicsUnit = G.PageUnit BMPContainer = Bmp.GetBounds(GU) "x,y=0 Me.Invalidate(Rectangle.Round(BMPContainer)) e.Graphics.DrawImage(Bmp, 150, 30) End Sub
End Class
</source>
Set Form Style: ResizeRedraw, DoubleBuffer, AllPaintingInWmPaint
<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Drawing.Imaging Public Class MainClass
Shared Sub Main() Dim form1 As Form1 = 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 "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() " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 273) Me.Name = "Form1" Me.Text = "Form1" End Sub
- End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.SetStyle(ControlStyles.ResizeRedraw, True) Me.SetStyle(ControlStyles.DoubleBuffer, True) Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True) End Sub Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim Bmp As Bitmap = New Bitmap("figure2.bmp") Dim BMPContainer As RectangleF Dim G As Graphics = Me.CreateGraphics() Dim GU As GraphicsUnit = G.PageUnit BMPContainer = Bmp.GetBounds(GU) "x,y=0 Me.Invalidate(Rectangle.Round(BMPContainer)) e.Graphics.DrawImage(Bmp, 150, 30) End Sub
End Class
</source>
Set Paint to be Double Buffered
<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Text Imports System.Drawing.Imaging Public Class MainClass
Shared Sub Main() Dim form1 As Form1 = 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 "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() " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 273) Me.Name = "Form1" Me.Text = "Form1" End Sub
- End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.SetStyle(ControlStyles.ResizeRedraw, True) Me.SetStyle(ControlStyles.DoubleBuffer, True) Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True) End Sub Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim Bmp As Bitmap = New Bitmap("figure2.bmp") Dim BMPContainer As RectangleF Dim G As Graphics = Me.CreateGraphics() Dim GU As GraphicsUnit = G.PageUnit BMPContainer = Bmp.GetBounds(GU) "x,y=0 Me.Invalidate(Rectangle.Round(BMPContainer)) e.Graphics.DrawImage(Bmp, 150, 30) End Sub
End Class
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