WPF调用zxing生成二维码

时间：2023-03-09 21:19:52
WPF调用zxing生成二维码

1.登录http://zxingnet.codeplex.com/，下载对应.net版本的zxing库

2.引入zxing.dll

3.新建界面控件

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using ZXing.Common;

using ZXing;

using ZXing.QrCode;

using System.Runtime.InteropServices;

using System.Drawing;

namespace zxingQRCodeDemo

{

    /// <summary>

    /// MainWindow.xaml 的交互逻辑

    /// </summary>

    public partial class MainWindow : Window

    {

        // 注销对象方法API

        [DllImport("gdi32")]

        static extern int DeleteObject(IntPtr o);

        public MainWindow()

        {

            InitializeComponent();

        }

        /// <summary>

        /// 创建二维码图像

        /// </summary>

        /// <param name="content">要写入的内容</param>

        /// <param name="width">宽</param>

        /// <param name="height">高</param>

        /// <returns></returns>

        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 =

            };

            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 ip = 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(ip, IntPtr.Zero, Int32Rect.Empty,

            System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());

            DeleteObject(ip);

            return bitmapSource;

        }

        private void btnMake_Click(object sender, RoutedEventArgs e)

        {

            imQRCode.Source = createQRCode("牛逼不牛逼", , );

        }

    }

}

注意，二维码是有容量的，最多635个汉字；2685个字符。

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