VB.Net/2D/Line Dash

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Controll the Dash Style

<source lang="vbnet"> 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 

      </source>


Line Dashes Demo

<source lang="vbnet"> 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
  1. 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
  1. 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 

      </source>


Line Dash Style Demo

<source lang="vbnet"> 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
  1. 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
  1. 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 

      </source>
Источник — «http://vbex.ru/index.php?title=VB.Net/2D/Line_Dash&oldid=159»