首先创建一个打印机类,继承PrintDocument.重写OnBeginPrint 方法,和 OnPrintPage方法.

' 使用VB.net操作打印机

@H_502_52@ImportsSystem.Drawing.Printing

@H_502_52@ImportsSystem.IO

@H_502_52@ImportsBarcodeLib

@H_502_52@

@H_502_52@

@H_502_52@PublicClassTextFilePrintDocument

@H_502_52@ InheritsPrintDocument

@H_502_52@

@H_502_52@ PrivateprintFontAsFont

@H_502_52@ PrivatestreamToPrintAsStreamReader

@H_502_52@

@H_502_52@ PublicSubNew(ByValstreamReaderAsStreamReader)

@H_502_52@ MyBase.New()

@H_502_52@ Me.streamToPrint = streamReader

@H_502_52@

@H_502_52@ EndSub

@H_502_52@

@H_502_52@ ProtectedOverridesSubOnBeginPrint(ByValeAsSystem.Drawing.Printing.PrintEventArgs)

@H_502_52@ MyBase.OnBeginPrint(e)

@H_502_52@ printFont= NewFont("Arial",10)

@H_502_52@ EndSub

@H_502_52@

@H_502_52@ ProtectedOverridesSubOnPrintPage(ByValeAsSystem.Drawing.Printing.PrintPageEventArgs)

@H_502_52@ MyBase.OnPrintPage(e)

@H_502_52@ DimlppAsSingle =e.MarginBounds.Height / printFont.GetHeight(e.Graphics)

@H_502_52@ DimyPosAsSingle =0

@H_502_52@ DimcountAsSingle =0

@H_502_52@ DimleftMarginAsSingle =e.MarginBounds.Left

@H_502_52@ DimtopMarginAsSingle =e.MarginBounds.Top

@H_502_52@ DimlineAsString =streamToPrint.ReadLine()

@H_502_52@

@H_502_52@ While (count < lppAndNotlineIsNothing)

@H_502_52@ yPos= topMargin + (count * printFont.GetHeight(e.Graphics))

@H_502_52@ e.Graphics.DrawString(line,printFont,Brushes.Black,leftMargin,yPos,NewStringFormat())

@H_502_52@ count= count + 1

@H_502_52@

@H_502_52@ If (count < lpp)Then

@H_502_52@ line= streamToPrint.ReadLine()

@H_502_52@ EndIf

@H_502_52@

@H_502_52@ EndWhile

@H_502_52@

@H_502_52@

@H_502_52@ If (line <> Nothing) Then

@H_502_52@ e.HasMorePages= True

@H_502_52@ Else

@H_502_52@ e.HasMorePages= False

@H_502_52@ EndIf

@H_502_52@

@H_502_52@

@H_502_52@

@H_502_52@ EndSub

@H_502_52@

@H_502_52@EndClass

@H_502_52@

-----------------

新建一个页面.添加一个按钮.

按钮的点击事件如下

@H_502_52@Imports System.IO

@H_502_52@Imports System.Drawing.Printing

@H_502_52@

@H_502_52@ PrivateSubprintButton_Click(ByValsenderAsSystem.Object,ByValeAsSystem.EventArgs) HandlesprintButton.Click

@H_502_52@ Try

@H_502_52@ DimstreamToPrintAsStreamReader= NewStreamReader("aa.txt")

@H_502_52@ Try

@H_502_52@ ' 使用缺省打印机

@H_502_52@ DimpdAsTextFilePrintDocument= NewTextFilePrintDocument(streamToPrint)

@H_502_52@

@H_502_52@

@H_502_52@ IfNotstoredPageSettingsIsNothingThen

@H_502_52@ pd.DefaultPageSettings = storedPageSettings

@H_502_52@ EndIf

@H_502_52@

@H_502_52@ DimdlgAsNewPrintDialog()

@H_502_52@ dlg.Document= pd

@H_502_52@ DimresultAsDialogResult= dlg.ShowDialog()

@H_502_52@

@H_502_52@ If (result = System.Windows.Forms.DialogResult.OK) Then

@H_502_52@ pd.Print()

@H_502_52@ EndIf

@H_502_52@ Finally

@H_502_52@ streamToPrint.Close()

@H_502_52@ EndTry

@H_502_52@ CatchexAsException

@H_502_52@ MessageBox.Show("error:" + ex.Message)

@H_502_52@ EndTry

@H_502_52@ EndSub

@H_502_52@

文件存放目录

@H_502_52@DimstreamToPrintAsStreamReader = NewStreamReader("aa.txt")

这个参数是需要打印文件的目录