VB.Net/2D/Line Dash

Controll the Dash Style

Imports System
Imports System.Runtime.InteropServices
Imports System.Drawing
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.IO
Imports System.Xml.Serialization
Public Class MainClass
    
    Shared Sub Main(ByVal args As String())
        Dim myform As New Form1()
        Application.Run(myform)            
    End Sub
End Class

Public Class Form1
    Private Sub DrawDashedBox(ByVal gr As System.Drawing.Graphics)
    End Sub
    Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        
        Dim my_pen As New System.Drawing.Pen(System.Drawing.Color.Blue, 5)
        my_pen.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDotDot
        Dim rect As System.Drawing.Rectangle = Me.ClientRectangle
        rect.X += 10
        rect.Y += 10
        rect.Width -= 20
        rect.Height -= 20
        e.Graphics.Clear(Me.BackColor)
        e.Graphics.DrawRectangle(my_pen, rect)
    End Sub
    Private Sub Form1_Resize(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Resize
        Me.Invalidate()
    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.SuspendLayout()
        "
        "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.Name = "Form1"
        Me.Text = "DrawDashes"
        Me.ResumeLayout(False)
    End Sub
End Class

Line Dashes Demo

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
Imports System.Diagnostics
Public Class MainClass
    Shared Sub Main()
        Dim myform As Form = New DashesForm()
        Application.Run(myform)
    End Sub
End Class

Public Class DashesForm
    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()
        components = New System.ruponentModel.Container()
        Me.Text = "DashesForm"
    End Sub
#End Region

    Private Sub DashesForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        Dim dashNames As String() = System.Enum.GetNames(GetType(DashStyle))
        Array.Sort(dashNames)
        Dim x As Integer = 0
        Dim y As Integer = 0
        Dim width As Integer = Me.ClientRectangle.Width / 2
        Dim height As Integer = Me.ClientRectangle.Height / ((dashNames.Length) / 2)
        Dim blackBrush As Brush = Brushes.Black
        Debug.Assert(dashNames.Length Mod 2 = 0)
        Dim dashName As String
        For Each dashName In dashNames
            Dim pen As Pen = New Pen(Color.Black, 12)
            pen.DashStyle = CType(System.Enum.Parse(GetType(DashStyle), dashName), DashStyle)
            If pen.DashStyle = DashStyle.Custom Then
                pen.DashPattern = New Single() {1, 1, 2, 1, 3, 1, 4, 1}
            End If
            g.DrawLine(pen, CInt(x + 10), CInt(y + height * 2 / 3), CInt(x + width - 20), CInt(y + height * 2 / 3))
            g.DrawString(dashName, Me.Font, blackBrush, x + 10, y)
            x = x + width
            If x > Me.ClientRectangle.Width - width Then
                y = y + height
                x = 0
            End If
        Next
    End Sub
End Class

Line Dash Style Demo

Imports System
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Text

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
  Friend WithEvents lblType As System.Windows.Forms.Label
  "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.lblType = New System.Windows.Forms.Label()
    Me.SuspendLayout()
    "
    "lblType
    "
    Me.lblType.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
    Me.lblType.Location = New System.Drawing.Point(16, 176)
    Me.lblType.Name = "lblType"
    Me.lblType.Size = New System.Drawing.Size(360, 24)
    Me.lblType.TabIndex = 0
    "
    "Form1
    "
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(392, 213)
    Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.lblType})
    Me.Name = "Form1"
    Me.Text = "Form1"
    Me.ResumeLayout(False)
  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 G As Graphics = e.Graphics
    Dim P1 As Pen = New Pen(Color.Blue, 10)
    "DashStyle 
    Dim P2 As Pen = New Pen(Color.Blue, 10)
    Dim pts() As Single = {3, 1, 2, 5}

    P2.DashStyle = Drawing.Drawing2D.DashStyle.Dash
    P2.DashPattern = pts
    "  P2.DashOffset = 40
    P2.DashCap = Drawing.Drawing2D.DashCap.Triangle
    P2.StartCap = Drawing.Drawing2D.LineCap.Round
    P2.EndCap = Drawing.Drawing2D.LineCap.ArrowAnchor
    G.DrawLine(P2, 20, CInt(Me.Height / 2), Me.Width - 20, CInt(Me.Height / 2))

  End Sub
End Class