C#利用zxing.net操作二维码和条形码

下载地址：http://zxingnet.codeplex.com/

zxing.net是.net平台下编解条形码和二维码的工具，使用非常方便。

首先下载二进制dll文件，引入工程；

代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using ZXing.QrCode;
using ZXing;
using ZXing.Common;
using ZXing.Rendering;

namespace zxingTest
{
public partial class Form1 : Form
{
EncodingOptions options = null;
BarcodeWriter writer = null;

public Form1()
{
InitializeComponent();
options = new QrCodeEncodingOptions
{
DisableECI = true,
CharacterSet = "UTF-8",
Width = pictureBoxQr.Width,
Height = pictureBoxQr.Height
};
writer = new BarcodeWriter();
writer.Format = BarcodeFormat.QR_CODE;
writer.Options = options;
}

private void buttonQr_Click(object sender, EventArgs e)
{
if (textBoxText.Text == string.Empty)
{
MessageBox.Show("输入内容不能为空！");
return;
}
Bitmap bitmap = writer.Write(textBoxText.Text);
pictureBoxQr.Image = bitmap;
}
}
}


效果：



将字符编码时可以指定字符格式；默认为ISO-8859-1英文字符集，但一般移动设备常用UTF-8字符集编码，

可以通过QrCodeEncodingOptions设置编码方式。

如果要生成其他zxing支持的条形码，只要修改BarcodeWriter.Format就可以了。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using ZXing.QrCode;
using ZXing;
using ZXing.Common;
using ZXing.Rendering;

namespace zxingTest
{
public partial class Form1 : Form
{
EncodingOptions options = null;
BarcodeWriter writer = null;

public Form1()
{
InitializeComponent();
options = new EncodingOptions
{
//DisableECI = true,
//CharacterSet = "UTF-8",
Width = pictureBoxQr.Width,
Height = pictureBoxQr.Height
};
writer = new BarcodeWriter();
writer.Format = BarcodeFormat.ITF;
writer.Options = options;
}

private void buttonQr_Click(object sender, EventArgs e)
{
if (textBoxText.Text == string.Empty)
{
MessageBox.Show("输入内容不能为空！");
return;
}
Bitmap bitmap = writer.Write(textBoxText.Text);
pictureBoxQr.Image = bitmap;
}
}
}

效果：



 输入字符串需要符合编码的格式，不然会报错。
解码方式：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using ZXing.QrCode;
using ZXing;
using ZXing.Common;
using ZXing.Rendering;

namespace zxingTest
{
public partial class Form1 : Form
{
BarcodeReader reader = null;

public Form1()
{
InitializeComponent();
reader = new BarcodeReader();
}

private void Form1_DragEnter(object sender, DragEventArgs e)//当拖放进入窗体
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
e.Effect = DragDropEffects.Copy; //显示拷贝效应
else
e.Effect = DragDropEffects.None;
}

private void Form1_DragDrop(object sender, DragEventArgs e) //当拖放放在窗体上
{
string[] fileNames = (string[])e.Data.GetData(DataFormats.FileDrop, false); //获取文件名
if (fileNames.Length > 0)
{
pictureBoxPic.Load(fileNames[0]); //显示图片
Result result = reader.Decode((Bitmap)pictureBoxPic.Image); //通过reader解码
textBoxText.Text = result.Text; //显示解析结果
}
}
}
}