C# Winform生成条码二维码

ZXing.NET用来生成和解释（条码、二维码）

添加引用：zxing.dll、zxing.presentation.dll

1 生成（条码、二维码）主要用到 BarcodeWriter、BarcodeFormat、EncodingOptions、BitmapRenderer 这几个类。

2 解释（条码、二维码）主要用到 BarcodeReader、DecodingOptions 这两个类。

  /// <summary>/// 条码、二维码/// </summary>public static class BarQrCodeHelper{/// <summary>/// 生成条码、二维码/// </summary>/// <param name="code">要编码内容</param>/// <param name="format">编码格式(条码CODE_128、二维码QR_CODE)</param>/// <param name="options">编码参数（条码EncodingOptions、二维码QrCodeEncodingOptions）</param>/// <param name="renderer">条码、二维码Bitmap参数</param>/// <param name="qrcodeoptions">二维码参数</param>/// <returns></returns>public static Bitmap EncodeBarQrCode(string code, BarcodeFormat format, EncodingOptions options, BitmapRenderer renderer = null, QrCodeOptions qrcodeoptions = null){BarcodeWriter writer = new BarcodeWriter();writer.Options = options;writer.Format = format;if (renderer != null)writer.Renderer = renderer;Bitmap bmp = writer.Write(code);if ((options is QrCodeEncodingOptions) && qrcodeoptions != null && qrcodeoptions.IsLogo){int w = qrcodeoptions.Width - qrcodeoptions.LogoPadding * 2;int h = qrcodeoptions.Height - qrcodeoptions.LogoPadding * 2;Rectangle logo_rect = new Rectangle((bmp.Width - w) / 2, (bmp.Height - h) / 2, w, h);if (qrcodeoptions.LogoPadding == 0){logo_rect = new Rectangle((bmp.Width - qrcodeoptions.Width) / 2, (bmp.Height - qrcodeoptions.Height) / 2, qrcodeoptions.Width, qrcodeoptions.Height);}Graphics bmp_g = Graphics.FromImage(bmp);bmp_g.InterpolationMode = InterpolationMode.HighQualityBicubic;bmp_g.CompositingQuality = CompositingQuality.HighQuality;bmp_g.SmoothingMode = SmoothingMode.AntiAlias;Bitmap logo_bmp = (Bitmap)qrcodeoptions.Logo;//按比例缩放Logoif ((qrcodeoptions.Logo.Width > logo_rect.Width || qrcodeoptions.Logo.Height > logo_rect.Height) || (qrcodeoptions.Logo.Width < logo_rect.Width && qrcodeoptions.Logo.Height < logo_rect.Height)){logo_bmp = new Bitmap(logo_rect.Width, logo_rect.Height);Graphics logo_g = Graphics.FromImage(logo_bmp);logo_g.InterpolationMode = InterpolationMode.HighQualityBicubic;logo_g.CompositingQuality = CompositingQuality.HighQuality;logo_g.SmoothingMode = SmoothingMode.AntiAlias;Rectangle rect = new Rectangle(0, 0, 0, 0);float num1 = (float)logo_rect.Width / (float)qrcodeoptions.Logo.Width;float num2 = (float)logo_rect.Height / (float)qrcodeoptions.Logo.Height;float num3 = Math.Min(num1, num2);rect.Width = (int)((float)qrcodeoptions.Logo.Width * (float)num3);rect.Height = (int)((float)qrcodeoptions.Logo.Height * (float)num3);rect.X = (logo_rect.Width - rect.Width) / 2;rect.Y = (logo_rect.Height - rect.Height) / 2;logo_g.DrawImage((Bitmap)qrcodeoptions.Logo, rect);logo_g.Dispose();}Bitmap corner_bmp = new Bitmap(logo_rect.Width, logo_rect.Height);//圆角处理Graphics corner_g = Graphics.FromImage(corner_bmp);corner_g.InterpolationMode = InterpolationMode.HighQualityBicubic;corner_g.CompositingQuality = CompositingQuality.HighQuality;corner_g.SmoothingMode = SmoothingMode.AntiAlias;corner_g.SetClip(CreateRoundedRectanglePath(new Rectangle(0, 0, logo_rect.Width, logo_rect.Height), qrcodeoptions.Radius));corner_g.DrawImage(logo_bmp, new Rectangle(0, 0, logo_bmp.Width, logo_bmp.Height));logo_bmp.Dispose();if (qrcodeoptions.LogoPadding != 0){Pen padding_pen = new Pen(Color.Gray);SolidBrush padding_sb = new SolidBrush(qrcodeoptions.LogoBackColor);Rectangle padding_rect = new Rectangle((bmp.Width - qrcodeoptions.Width) / 2, (bmp.Height - qrcodeoptions.Height) / 2, qrcodeoptions.Width, qrcodeoptions.Height);GraphicsPath padding_path = CreateRoundedRectanglePath(padding_rect, qrcodeoptions.Radius);bmp_g.FillPath(padding_sb, padding_path);bmp_g.DrawPath(padding_pen, padding_path);padding_sb.Dispose();padding_pen.Dispose();padding_path.Dispose();}bmp_g.DrawImage(corner_bmp, logo_rect);corner_bmp.Dispose();corner_g.Dispose();bmp_g.Dispose();}return bmp;}/// <summary>/// 解释条码、二维码/// </summary>/// <param name="code">要解码内容</param>/// <param name="options">解码参数</param>/// <returns></returns>public static string DecodeBarQrCode(Bitmap code, DecodingOptions options){BarcodeReader reader = new BarcodeReader();reader.Options = options;reader.AutoRotate = true;Result result = reader.Decode(code);return result != null ? result.Text : String.Empty;}/// <summary>/// 创建圆角矩形/// </summary>/// <param name="rect">区域</param>/// <param name="cornerRadius">圆角角度</param>/// <returns></returns>private static GraphicsPath CreateRoundedRectanglePath(Rectangle rect, int cornerRadius){GraphicsPath result = new GraphicsPath();int diameter = cornerRadius * 2;result.AddArc(rect.X, rect.Y, diameter, diameter, 180, 90);result.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius, rect.Y);result.AddArc(rect.Right - diameter, rect.Y, diameter, diameter, 270, 90);result.AddLine(rect.Right, rect.Y + cornerRadius, rect.Right, rect.Bottom - cornerRadius);result.AddArc(rect.Right - diameter, rect.Bottom - diameter, diameter, diameter, 0, 90);result.AddLine(rect.Right - cornerRadius, rect.Bottom, rect.X + cornerRadius, rect.Bottom);result.AddArc(rect.X, rect.Bottom - diameter, diameter, diameter, 90, 90);result.AddLine(rect.X, rect.Bottom - cornerRadius, rect.X, rect.Y + cornerRadius);result.CloseFigure();return result;}/// <summary>/// 二维码参数/// </summary>public class QrCodeOptions{public QrCodeOptions(){}public QrCodeOptions(int _Radius, bool _IsLogo, Image Logo, int _Width, int _Height, int _LogoPadding, Color _LogoBackColor, Color _LogoBorderColor){this.Radius = _Radius;this.IsLogo = _IsLogo;this.Logo = Logo;this.Width = _Width;this.Height = _Height;this.LogoPadding = _LogoPadding;this.LogoBackColor = _LogoBackColor;this.LogoBorderColor = _LogoBorderColor;}/// <summary>/// 圆角度数/// </summary>public int Radius = 4;/// <summary>/// 是否显示Logo/// </summary>public bool IsLogo = false;/// <summary>/// Logo图片/// </summary>public Image Logo;/// <summary>/// Logo宽度/// </summary>public int Width;/// <summary>/// Logo高度/// </summary>public int Height;/// <summary>/// Logo内边距/// </summary>public int LogoPadding = 4;/// <summary>/// Logo内边距背景颜色/// </summary>public Color LogoBackColor = Color.White;/// <summary>/// Logo边框颜色/// </summary>public Color LogoBorderColor = Color.Gray;}}

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