第一段：条形码的读取
Option Explicit
Dim sData As String
Private Sub Form_Load()
With MSComm1
.PortOpen = True '打开通讯端口
End With
End Sub
Private Sub MSComm1_OnComm()
Dim EndPos As Integer
Select Case MSComm1.CommEvent
Case comEvReceive '当有数据传送过来时
sData = sData Trim(MSComm1.Input)
'检索回车,通常读卡机每组数据结尾都返回一个回车作为结束符
If EndPos = 0 Then '如果未结束就继续努力
Else '读完一组.
lblBarCode.Caption = sData '显示一组条形码
With lstBarCode
.AddItem Mid(sData, 1, EndPos - 1) '添加一组条形码到列表
sData = "" '清空
End If
End Select
Private Sub cmdEnd_Click()
MSComm1.PortOpen = False '关闭端口
End
二：条形码的生成
在VB上编程本来就不难.以下关于条形码生成的代码也是很容易理解,只需使用一个OFFICE的附带的 BarCode控件就可以轻松打印出11种不同标准的条形码,足以满足我们的要求.想起我书架上的一本书中的一篇用Turbo C编写条形码打印程序文章,长篇大论,那时不知看了n天,打了n小时字结果也不尽人意,现在真是幸福多了:).废话说完,得回归正题.且看条形码生成的代码及有关说明.
新建一个标准工程,添加一个名为(Microsoft Access BarCode
模块modGetScreen.bas代码如下：
声明BitBlt、GetDesktopWindow、GetWindowDC、ReleaseDC这几个API函数略
Public RegUser As Boolean
Sub GetObjImage1(Obj As Object, OwnerForm As PictureBox, Picture1
As PictureBox)
'hDC
Dim hWndDesk As Long
Dim hDCDesk As Long
'区域表达变量
Dim x As Long
Dim y As Long
Dim w As Long
Dim h As Long
x = Obj.Left Screen.TwipsPerPixelX
y = Obj.Top Screen.TwipsPerPixelY
w = Obj.Width Screen.TwipsPerPixelX
h = Obj.Height Screen.TwipsPerPixelY
hDCDesk = OwnerForm.hdc
'取出图像
Call BitBlt(Picture1.hdc, 0, 0, w, h, hDCDesk, x, y,
vbSrcCopy)
Call ReleaseDC(hWndDesk, hDCDesk)
主窗体frmMain.frm部分代码如下：
Private Sub cmdPrint_Click()
'生成条形码图像
Dim r As Long, i As Integer, t As String,cfile As
String '临时变量
t = BarCode
For i = 0 To Val(Times) - 1
BarCode1.Value = BarCode ◆ i
DoEvents
Picture1.Refresh
GetObjImage1 BarCode1, Conel, Picture1
If RegUser = False Then '如果未注册添加MASK标记
If Dir(SavePath, vbDirectory) = "" Then MkDir SavePath
SavePath = SavePath IIf(Right(SavePath, 1) "", "",
"")
cfile = SavePath BarCode1.Value ".bmp"
SavePicture Picture1.Image, cfile '将条形码保存为图像文件以便打印
Next
BarCode = t
条形码设置窗体frmOption.frm代码如下：
'条形码设置模块
Private Sub cboBig_Click()
BarCode1.Style = cboBig.ListIndex '改变标准
Private Sub cboDirection_Click()
BarCode1.Direction = cboDirection.ListIndex '改变方向
Private Sub cboLine_Click()
BarCode1.LineWeight = cboLine.ListIndex '改变线宽
Private Sub cboSmall_Click()
BarCode1.SubStyle = cboSmall.ListIndex '改变样式
Private Sub Check1_Click()
BarCode1.ShowData = Check1.Value '是否显示数据
Private Sub cmdChange_Click()
'设置长、宽大小
BarWidth = BarCode1.Height
BarHeight = BarCode1.Width
cmdRefresh_Click
Private Sub cmdOK_Click()
'传送条形码设定到主界面
With frmMain.BarCode1
.LineWeight = BarCode1.LineWeight
.Style = BarCode1.Style
.SubStyle = BarCode1.SubStyle
.Direction = BarCode1.Direction
.Width = BarCode1.Width
.Height = BarCode1.Height
.ShowData = BarCode1.ShowData
Me.Hide
With frmMain
.Picture1.Width = .BarCode1.Width
.Picture1.Height = .BarCode1.Height
.Conel.Width = .BarCode1.Width
.Conel.Height = .BarCode1.Height
Private Sub cmdRefresh_Click()
BarCode1.Width = BarWidth
BarCode1.Height = BarHeight
LoadBarInfo
BarWidth = BarCode1.Width
BarHeight = BarCode1.Height
Sub LoadBarInfo() '初始化选项
LoadBigClass cboBig
LoadSmallClass cboSmall
LoadLineSize cboLine
LoadDirection cboDirection
Sub LoadBigClass(cbo As ComboBox) '条码标准
With cbo
.AddItem "UPC-A"
.AddItem "UPC-E"
.AddItem "Case Code"
.AddItem "Codabar (NW-T)"
.AddItem "U.S. Postnet"
.AddItem "U.S. Postal FIM"
.AddItem "JP Post"
Sub LoadSmallClass(cbo As ComboBox) '条码样式
.AddItem "Standard"
.AddItem "POS Case Code"
.ListIndex = 0
许多人在编写数据库应用程序时,都想要加上条形码功能加强工作效率,尤其是销售管理,图书馆管理这类流量大的应用软件,但由于条形码技术难以掌握、标谁又多以及过去的技术种种原因,使得许多人望而却步.本文介绍的一套简单实用的条形码解决方法,希望能帮助各位完善软件系统的功能.
报表设置该字体自然就表示成条形码了.
这个要看扫描枪的通讯接口和通讯协议,以及接口程序是否支持VB.NET等.
以上就是土嘎嘎小编为大家整理的vb.net做条码相关主题介绍,如果您觉得小编更新的文章只要能对粉丝们有用,就是我们最大的鼓励和动力,不要忘记讲本站分享给您身边的朋友哦！！