VB.Net/2D/Bmp

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Save an Image to Bmp File

Imports System
Imports System.Windows.Forms
Imports System.Collections.Generic
Imports System.ruponentModel
Imports System.Drawing.Imaging
Imports System.Drawing
Public Class MainClass
   Shared Sub Main()
        Dim bm As New Bitmap(256, 256)
        " Draw on it.
        Dim gr As Graphics = Graphics.FromImage(bm)
        gr.Clear(Color.White)
        gr.DrawEllipse(Pens.Red, 0, 0, bm.Width - 1, bm.Height - 1)
        gr.DrawLine(Pens.Green, 0, 0, bm.Width - 1, bm.Height - 1)
        gr.DrawLine(Pens.Blue, bm.Width - 1, 0, 0, bm.Height - 1)
        " Save the result as a JPEG file.
        bm.Save("test.Bmp", ImageFormat.Bmp)
   End Sub 
End Class


Set BMP file to Transparent

Imports System
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Imaging
Public Class MainClass
    Shared Sub Main()
        Dim myform As Form = New TransparencyForm()
        Application.Run(myform)
    End Sub
End Class
Public Class TransparencyForm
    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
        Me.SetStyle(ControlStyles.ResizeRedraw, True)
        Me.SetStyle(ControlStyles.DoubleBuffer, True)
        Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
    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 splitter2 As System.Windows.Forms.Splitter
    Friend WithEvents splitter1 As System.Windows.Forms.Splitter
    Friend WithEvents groupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents panel1 As System.Windows.Forms.Panel
    Friend WithEvents groupBox3 As System.Windows.Forms.GroupBox
    Friend WithEvents panel3 As System.Windows.Forms.Panel
    Friend WithEvents groupBox2 As System.Windows.Forms.GroupBox
    Friend WithEvents panel2 As System.Windows.Forms.Panel
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.splitter2 = New System.Windows.Forms.Splitter()
        Me.splitter1 = New System.Windows.Forms.Splitter()
        Me.groupBox1 = New System.Windows.Forms.GroupBox()
        Me.panel1 = New System.Windows.Forms.Panel()
        Me.groupBox3 = New System.Windows.Forms.GroupBox()
        Me.panel3 = New System.Windows.Forms.Panel()
        Me.groupBox2 = New System.Windows.Forms.GroupBox()
        Me.panel2 = New System.Windows.Forms.Panel()
        Me.groupBox1.SuspendLayout()
        Me.groupBox3.SuspendLayout()
        Me.groupBox2.SuspendLayout()
        Me.SuspendLayout()
        "
        "splitter2
        "
        Me.splitter2.Location = New System.Drawing.Point(232, 0)
        Me.splitter2.Name = "splitter2"
        Me.splitter2.Size = New System.Drawing.Size(3, 102)
        Me.splitter2.TabIndex = 9
        Me.splitter2.TabStop = False
        "
        "splitter1
        "
        Me.splitter1.Location = New System.Drawing.Point(229, 0)
        Me.splitter1.Name = "splitter1"
        Me.splitter1.Size = New System.Drawing.Size(3, 102)
        Me.splitter1.TabIndex = 6
        Me.splitter1.TabStop = False
        "
        "groupBox1
        "
        Me.groupBox1.Controls.AddRange(New System.Windows.Forms.Control() {Me.panel1})
        Me.groupBox1.Dock = System.Windows.Forms.DockStyle.Left
        Me.groupBox1.Location = New System.Drawing.Point(117, 0)
        Me.groupBox1.Name = "groupBox1"
        Me.groupBox1.Size = New System.Drawing.Size(112, 102)
        Me.groupBox1.TabIndex = 5
        Me.groupBox1.TabStop = False
        Me.groupBox1.Text = "Original Colors"
        "
        "panel1
        "
        Me.panel1.BackColor = System.Drawing.Color.White
        Me.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.panel1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.panel1.Location = New System.Drawing.Point(3, 16)
        Me.panel1.Name = "panel1"
        Me.panel1.Size = New System.Drawing.Size(106, 83)
        Me.panel1.TabIndex = 0
        "
        "groupBox3
        "
        Me.groupBox3.Controls.AddRange(New System.Windows.Forms.Control() {Me.panel3})
        Me.groupBox3.Dock = System.Windows.Forms.DockStyle.Fill
        Me.groupBox3.Location = New System.Drawing.Point(117, 0)
        Me.groupBox3.Name = "groupBox3"
        Me.groupBox3.Size = New System.Drawing.Size(235, 102)
        Me.groupBox3.TabIndex = 8
        Me.groupBox3.TabStop = False
        Me.groupBox3.Text = "Made Transparent"
        "
        "panel3
        "
        Me.panel3.BackColor = System.Drawing.Color.White
        Me.panel3.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.panel3.Dock = System.Windows.Forms.DockStyle.Fill
        Me.panel3.Location = New System.Drawing.Point(3, 16)
        Me.panel3.Name = "panel3"
        Me.panel3.Size = New System.Drawing.Size(229, 83)
        Me.panel3.TabIndex = 0
        "
        "groupBox2
        "
        Me.groupBox2.Controls.AddRange(New System.Windows.Forms.Control() {Me.panel2})
        Me.groupBox2.Dock = System.Windows.Forms.DockStyle.Left
        Me.groupBox2.Name = "groupBox2"
        Me.groupBox2.Size = New System.Drawing.Size(117, 102)
        Me.groupBox2.TabIndex = 7
        Me.groupBox2.TabStop = False
        Me.groupBox2.Text = "White Background"
        "
        "panel2
        "
        Me.panel2.BackColor = System.Drawing.Color.White
        Me.panel2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.panel2.Dock = System.Windows.Forms.DockStyle.Fill
        Me.panel2.Location = New System.Drawing.Point(3, 16)
        Me.panel2.Name = "panel2"
        Me.panel2.Size = New System.Drawing.Size(111, 83)
        Me.panel2.TabIndex = 0
        "
        "TransparencyForm
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(352, 102)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.splitter2, Me.splitter1, Me.groupBox1, Me.groupBox3, Me.groupBox2})
        Me.Name = "TransparencyForm"
        Me.Text = "TransparencyForm"
        Me.groupBox1.ResumeLayout(False)
        Me.groupBox3.ResumeLayout(False)
        Me.groupBox2.ResumeLayout(False)
        Me.ResumeLayout(False)
    End Sub
#End Region

    Dim backgroundString As String = "a\n b\n c\n d\n e\n f\n g\n H \n"

    Private Sub panel1_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles panel1.Paint
        Dim g As Graphics = e.Graphics
        Dim bmp As Bitmap = New Bitmap("figure2.BMP")
        g.DrawString(backgroundString, Me.Font, Brushes.Black, Me.ClientRectangle.Left, Me.ClientRectangle.Top)
        Dim rect As Rectangle = New Rectangle(0, 0, bmp.Width, bmp.Height)
        rect.Offset((Me.panel1.ClientRectangle.Width - rect.Width) / 2, (Me.panel1.ClientRectangle.Height - rect.Height) / 2)
        g.DrawImage(bmp, rect)
    End Sub
    Private Sub panel2_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles panel2.Paint
        Dim g As Graphics = e.Graphics
        Dim bmp As Bitmap = New Bitmap("figure2.BMP")
        g.DrawString(backgroundString, Me.Font, Brushes.Black, Me.ClientRectangle.Left, Me.ClientRectangle.Top)
        Dim colorMap As ColorMap() = New ColorMap() {New ColorMap()}
        colorMap(0).OldColor = bmp.GetPixel(0, bmp.Height - 1)
        colorMap(0).NewColor = Color.White
        Dim attr As ImageAttributes = New ImageAttributes()
        attr.SetRemapTable(colorMap)
        Dim rect As Rectangle = New Rectangle(0, 0, bmp.Width, bmp.Height)
        rect.Offset((Me.panel1.ClientRectangle.Width - rect.Width) / 2, (Me.panel1.ClientRectangle.Height - rect.Height) / 2)
        g.DrawImage(bmp, rect)
    End Sub
    Private Sub panel3_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles panel3.Paint
        Dim g As Graphics = e.Graphics
        Dim bmp As Bitmap = New Bitmap("figure2.BMP")
        g.DrawString(backgroundString, Me.Font, Brushes.Black, Me.ClientRectangle.Left, Me.ClientRectangle.Top)
        bmp.MakeTransparent(bmp.GetPixel(0, bmp.Height - 1))
        Dim rect As Rectangle = New Rectangle(0, 0, bmp.Width, bmp.Height)
        rect.Offset((Me.panel1.ClientRectangle.Width - rect.Width) / 2, (Me.panel1.ClientRectangle.Height - rect.Height) / 2)
        g.DrawImage(bmp, rect)
    End Sub
    Private Sub TransparencyForm_Layout(ByVal sender As Object, ByVal e As LayoutEventArgs) Handles MyBase.Layout
        panel1.Refresh()
        panel2.Refresh()
        panel3.Refresh()
    End Sub
End Class
Источник — «http://vbex.ru/index.php?title=VB.Net/2D/Bmp&oldid=153»