1、通过NuGet安装控件：

Install-Package ZXing.Net

2、添加引用System.Drawing

3、在xaml中添加一个Image控件，用于显示二维码，命名为image1

完整示例代码：

using System;using System.Drawing;using System.Runtime.InteropServices;using System.Windows;using System.Windows.Media;using System.Windows.Media.Imaging;using ZXing;using ZXing.Common;using ZXing.QrCode;namespace WpfDemo{    /// 
    /// MainWindow.xaml 的交互逻辑    /// 
    public partial class MainWindow : Window    {        [DllImport("gdi32")]        static extern int DeleteObject(IntPtr o);        public MainWindow()        {            InitializeComponent();            image1.Source = createQRCode("http://www.cnsos.net/", 1000, 1000);        }        /// 
        /// 创建二维码图片        /// 
        ///         ///         ///         /// 
             private ImageSource createQRCode(string content, int width, int height)        {            EncodingOptions options;            //包含一些编码、大小等的设置            //BarcodeWriter :一个智能类来编码一些内容的条形码图像            BarcodeWriter write = null;            options = new QrCodeEncodingOptions            {                DisableECI = true,                CharacterSet = "UTF-8",                Width = width,                Height = height,                Margin = 0            };            write = new BarcodeWriter();            //设置条形码格式            write.Format = BarcodeFormat.QR_CODE;            //获取或设置选项容器的编码和渲染过程。            write.Options = options;            //对指定的内容进行编码，并返回该条码的呈现实例。渲染属性渲染实例使用，必须设置方法调用之前。            Bitmap bitmap = write.Write(content);            IntPtr bmpHandle = bitmap.GetHbitmap();            //从GDI+ Bitmap创建GDI位图对象            //Imaging.CreateBitmapSourceFromHBitmap方法，基于所提供的非托管位图和调色板信息的指针，返回一个托管的BitmapSource            BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(bmpHandle, IntPtr.Zero, Int32Rect.Empty,                                            BitmapSizeOptions.FromEmptyOptions());            DeleteObject(bmpHandle);            return bitmapSource;        }    }}

 

转自：http://blog.csdn.net/wangshubo1989/article/details/47152533