C#利用Zxing.net生成条形码和二维码并实现打印的功能

    开篇：zxing.net是.net平台下编解条形码和二维码的工具。

下载地址：http://pan.baidu.com/s/1kTr3Vuf

Step1：使用VS2010新建一个窗体程序项目：

Step2：添加三个类：分别是BarCodeClass.cs、DocementBase.cs、imageDocument.cs。（下一步贴出这些类的代码）;;;;添加下载回来的引用zxing.dll。

》说明：

《1》   BarCodeClass.cs主要用来实现条形码和二维码的生成和解析。

《2》   DocementBase.cs、imageDocument.cs这两个类是用来实现对生成的条形码和二维码进行打印。

Step3:编写上一步的三个类的代码：

》BarCodeClass.cs

    using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using ZXing.Common;

using ZXing;

using System.Windows.Forms;

using System.Drawing;

using System.Text.RegularExpressions;

using ZXing.QrCode;

namespace BarCode

{

class BarCodeClass

{

///<summary>

///生成条形码

///</summary>

///<paramname="pictureBox1"></param>

///<paramname="Contents"></param>

public void CreateBarCode(PictureBoxpictureBox1,string Contents)

{

Regexrg = new Regex("^[0-9]{12}$");

if(!rg.IsMatch(Contents))

{

位数字");

return;

}

EncodingOptionsoptions =null;

BarcodeWriterwriter =null;

options = newEncodingOptions

{

Width = pictureBox1.Width,

Height = pictureBox1.Height

};

writer = newBarcodeWriter();

writer.Format = BarcodeFormat.ITF;

writer.Options = options;

Bitmapbitmap = writer.Write(Contents);

pictureBox1.Image = bitmap;

}

///<summary>

///生成二维码

///</summary>

///<paramname="pictureBox1"></param>

///<paramname="Contents"></param>

public void CreateQuickMark(PictureBoxpictureBox1,string Contents)

{

if(Contents == string.Empty)

{

MessageBox.Show("输入内容不能为空！");

return;

}

EncodingOptionsoptions =null;

BarcodeWriterwriter =null;

options = newQrCodeEncodingOptions

{

DisableECI = true,

CharacterSet = "UTF-8",

Width = pictureBox1.Width,

Height = pictureBox1.Height

};

writer = newBarcodeWriter();

writer.Format = BarcodeFormat.QR_CODE;

writer.Options = options;

Bitmapbitmap = writer.Write(Contents);

pictureBox1.Image = bitmap;

}

///<summary>

///解码

///</summary>

///<paramname="pictureBox1"></param>

public void Decode(PictureBoxpictureBox1)

{

BarcodeReaderreader =new BarcodeReader();

Resultresult = reader.Decode((Bitmap)pictureBox1.Image);

}

}

}

》DocementBase.cs

    using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Drawing.Printing;

using System.Drawing;

using System.Windows.Forms;

namespace BarCode

{

class DocementBase : PrintDocument

{

//fields

public Font Font = new Font("Verdana",10, GraphicsUnit.Point);

//预览打印

public DialogResult showPrintPreviewDialog()

{

PrintPreviewDialogdialog =new PrintPreviewDialog();

dialog.Document = this;

returndialog.ShowDialog();

}

//先设置后打印

public DialogResult ShowPageSettingsDialog()

{

PageSetupDialogdialog =new PageSetupDialog();

dialog.Document = this;

returndialog.ShowDialog();

}

}

}

》imageDocument.cs

    using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Drawing;

using System.Drawing.Printing;

namespace BarCode

{

class imageDocument : DocementBase

{

privateImage _Image;

public Image Image

{

get

{

return_Image;

}

set

{

_Image = value;

if(_Image != null)

{

if(_Image.Size.Width > _Image.Size.Height)

DefaultPageSettings.Landscape = true;

else

DefaultPageSettings.Landscape = false;

}

}

}

publicimageDocument()

{

}

publicimageDocument(Image image)

{

this.Image= image;

}

protectedoverridevoidOnPrintPage(PrintPageEventArgs e)

{

if(Image == null)

{

thrownewInvalidOperationException();

}

RectanglebestFit = GetBestFitRectangle(e.MarginBounds, Image.Size);

e.Graphics.DrawImage(Image, bestFit);

e.Graphics.DrawRectangle(Pens.Black, bestFit);

e.Graphics.DrawRectangle(Pens.Black, e.MarginBounds);

}

// 保持高度比：参数为(打印边界的Rectangularle对象，图像大小的Size对象)

protectedRectangle GetBestFitRectangle(Rectangle toContain,SizeobjectSize)

{

//检查页面是水平还是竖直的。

boolcontainerLandscape =false;

if(toContain.Width > toContain.Height)

containerLandscape = true;

//高度比=图像的高/图像的宽

floataspectRatio = (float)objectSize.Height / (float)objectSize.Width;

//得到页面左上角的坐标

intmidContainerX = toContain.Left + (toContain.Width / 2);

intmidContainerY = toContain.Top + (toContain.Height / 2);

intx1 = 0, x2 = 0, y1 = 0, y2 = 0;

if(containerLandscape ==false)

{

//竖直图像

x1 = toContain.Left;

x2 = toContain.Right;

//调整之后的height

intadjustedHeight = (int)((float)toContain.Width * aspectRatio);

y1 = midContainerY -(adjustedHeight / 2);

y2 = y1 + adjustedHeight;

}

else

{

y1 = toContain.Top;

y2 = toContain.Bottom;

//调整之后的height

intadjustedWidth = (int)((float)toContain.Height/ aspectRatio);

x1 = midContainerX -(adjustedWidth / 2);

x2 = x1 + adjustedWidth;

}

returnnewRectangle(x1,y1, x2 - x1, y2 - y1);

}

}

}

Step4：修改界面。

Step5：依次双击【生成条形码】、【生成二维码】、【解码】、【打印】等按钮，进入Click事件,编写后台代码。这里不再一一讲述如何实现。代码参照下一步：

Step6:贴出窗体的全部代码。

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Text.RegularExpressions;

using ZXing;

using ZXing.QrCode.Internal;

using ZXing.Common;

using System.IO;

using ZXing.QrCode;

namespace BarCode

{

public partial class Main : Form

{

publicMain()

{

InitializeComponent();

}

private BarCodeClass bcc = newBarCodeClass();

private DocementBase _docement;

//生成条形码

privatevoid button1_Click(objectsender,EventArgs e)

{

bcc.CreateBarCode(pictureBox1,txtMsg.Text);

}

//生成二维码

privatevoid button2_Click(objectsender,EventArgs e)

{

bcc.CreateQuickMark(pictureBox1, txtMsg.Text);

}

privatevoid Form1_Load(objectsender,EventArgs e)

{

txtMsg.Text = System.DateTime.Now.ToString("yyyyMMddhhmmss").Substring(0,12);

}

//解码

privatevoid button4_Click(objectsender,EventArgs e)

{

if(pictureBox1.Image ==null)

{

MessageBox.Show("请录入图像后再进行解码!");

return;

}

BarcodeReaderreader =new BarcodeReader();

Resultresult = reader.Decode((Bitmap)pictureBox1.Image);

MessageBox.Show(result.Text);

}

//打印

privatevoid button3_Click(objectsender,EventArgs e)

{

if(pictureBox1.Image ==null)

{

MessageBox.Show("You Must Load an Image first!");

return;

}

else

{

_docement=new imageDocument(pictureBox1.Image);

}

_docement.showPrintPreviewDialog();

}

}

}

Step7：剩下的就是演示了：本机演示结果如下：

》运行程序：点击【生成条形码】，结果如下：

》点击【解码】按钮，结果如下：

》点击《打印》按钮，结果如下：

》点击【生成二维码】按钮，结果如下：

》点击【解码】按钮，结果如下：

》点击【打印】按钮，结果如下：