VB.Net Tutorial/2D Graphics/Measure String

Measure string and draw rectangle around string

Imports System
Imports System.Drawing
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Globalization

public class GraphicsMeasureStringRectangle
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Inherits System.Windows.Forms.Form
    Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        Dim s As String = "a multi-line string:" & vbCrLf & "line 2" & vbCrLf & "line 3"
        Dim y As Single = 0
        Dim arrPens As Pen() = New Pen() {Pens.Red, Pens.Green, Pens.Blue}
        Dim line As String
        For Each line In s.Split(vbCrLf)
            Dim width As Single = ClientRectangle.Width
            Dim height As Single = ClientRectangle.Height - y
            Dim layoutRect As RectangleF = New RectangleF(0, y, width, height)
            Dim format As StringFormat = New StringFormat(StringFormatFlags.NoWrap Or StringFormatFlags.DisplayFormatControl)
            g.DrawString(line, Me.Font, Brushes.Black, layoutRect, format)
            Dim size As SizeF = g.MeasureString(line, Me.Font, layoutRect.Size, format)
            g.DrawRectangle(arrPens(CInt(y / Me.Font.GetHeight(g))), 0, y, size.Width, size.Height)
            y = y + Me.Font.GetHeight(g)
        Next
    End Sub

    Public Sub New()
        MyBase.New()
        InitializeComponent()
    End Sub
    Private components As System.ruponentModel.IContainer
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(20, 60)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.Font = New System.Drawing.Font("Microsoft Sans Serif", 14.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
    End Sub
End Class

Measure string and draw string

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MeasureString
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
        Dim textArea As SizeF
        Dim linePen As Pen
        Dim largeFont As Font
        Dim fontRatio As Single
        Dim ascentSize As Single
        Dim descentSize As Single
        Dim emSize As Single
        Dim cellHeight As Single
        Dim internalLeading As Single
        Dim externalLeading As Single
        e.Graphics.TextRenderingHint = Drawing.Text.TextRenderingHint.AntiAlias
        largeFont = New Font("Times New Roman", 96, FontStyle.Regular)
        fontRatio = largeFont.Height / largeFont.FontFamily.GetLineSpacing(FontStyle.Regular)
        textArea = e.Graphics.MeasureString("AbcJgp", largeFont)
        e.Graphics.DrawString("AbcJgp", largeFont, Brushes.Black, 0, 0)
        linePen = New Pen(Color.Gray, 1)
        linePen.DashStyle = Drawing2D.DashStyle.Dash
        ascentSize = largeFont.FontFamily.GetCellAscent(FontStyle.Regular) * fontRatio
        descentSize = largeFont.FontFamily.GetCellDescent(FontStyle.Regular) * fontRatio
        emSize = largeFont.FontFamily.GetEmHeight(FontStyle.Regular) * fontRatio
        cellHeight = ascentSize + descentSize
        internalLeading = cellHeight - emSize
        externalLeading = (largeFont.FontFamily.GetLineSpacing(FontStyle.Regular) * fontRatio) - cellHeight
        e.Graphics.DrawLine(linePen, 0, 0, textArea.Width, 0)
        e.Graphics.DrawLine(linePen, 0, textArea.Height, textArea.Width, textArea.Height)
        e.Graphics.DrawLine(linePen, 0, ascentSize, textArea.Width, ascentSize)
        e.Graphics.DrawLine(linePen, 0, ascentSize + descentSize, textArea.Width, ascentSize + descentSize)
        linePen.Dispose()
        largeFont.Dispose()
        e.Graphics.ResetTransform()
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected 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.PictureBox1 = New System.Windows.Forms.PictureBox
        CType(Me.PictureBox1, System.ruponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        "
        "PictureBox1
        "
        Me.PictureBox1.BackColor = System.Drawing.Color.White
        Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
        Me.PictureBox1.Location = New System.Drawing.Point(8, 8)
        Me.PictureBox1.Name = "PictureBox1"
        Me.PictureBox1.Size = New System.Drawing.Size(550, 224)
        Me.PictureBox1.TabIndex = 0
        Me.PictureBox1.TabStop = False
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(600, 242)
        Me.Controls.Add(Me.PictureBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "Measuring Text"
        CType(Me.PictureBox1, System.ruponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
    End Sub
    Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
End Class