Public Class PrintingExample
Inherits System.Windows.Forms.Form
Private components As System.ComponentModel.Container
Private printButton As System.Windows.Forms.Button
Private printFont As Font
Private streamToPrint As StreamReader
Public Sub New()
The Windows Forms Designer requires the following call.
InitializeComponent()
End Sub
The Click event is raised when the user clicks the Print button.
Private Sub printButton_Click(sender As Object, e As EventArgs)
Try
streamToPrint = New StreamReader("C:\My Documents\MyFile.txt")
Try
printFont = New Font("Arial", 10)
Dim pd As New PrintDocument()
AddHandler pd.PrintPage, AddressOf Me.pd_PrintPage
pd.Print()
Finally
streamToPrint.Close()
End Try
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
The PrintPage event is raised for each page to be printed.
Private Sub pd_PrintPage(sender As Object, ev As PrintPageEventArgs)
Dim linesPerPage As Single = 0
Dim yPos As Single = 0
Dim count As Integer = 0
Dim leftMargin As Single = ev.MarginBounds.Left
Dim topMargin As Single = ev.MarginBounds.Top
Dim line As String = Nothing
Calculate the number of lines per page.
linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics)
Print each line of the file.
While count < linesPerPage
line = streamToPrint.ReadLine()
If line Is Nothing Then
Exit While
End If
yPos = topMargin + count * printFont.GetHeight(ev.Graphics)
ev.Graphics.DrawString(line, printFont, Brushes.Black, leftMargin, yPos, New StringFormat())
count += 1
End While
If more lines exist, print another page.
If Not (line Is Nothing) Then
ev.HasMorePages = True
Else
ev.HasMorePages = False
End If
End Sub
The Windows Forms Designer requires the following procedure.
Private Sub InitializeComponent()
Me.components = New System.ComponentModel.Container()
Me.printButton = New System.Windows.Forms.Button()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(504, 381)
Me.Text = "Print Example"
printButton.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft
printButton.Location = New System.Drawing.Point(32, 110)
printButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat
printButton.TabIndex = 0
printButton.Text = "Print the file."
printButton.Size = New System.Drawing.Size(136, 40)
AddHandler printButton.Click, AddressOf printButton_Click
Me.Controls.Add(printButton)
End Sub
This is the main entry point for the application.
Public Shared Sub Main()
Application.Run(New PrintingExample())
End Sub
End Class
