/// <summary>/// 生成彩色二维码/// </summary>/// <param name="data">二维码内容</param>/// <param name="filename">生成的图片名称（如：123.jpg）</param>/// <param name="filepath">图片存放路径（如：Images\\CustomerQRCode）</param>/// <returns></returns>public static bool CreateQRCode(string data, string filename, string filepath){if (string.IsNullOrWhiteSpace(data) || string.IsNullOrWhiteSpace(filename) || string.IsNullOrWhiteSpace(filepath))return false;QRCodeWriter writer = new QRCodeWriter();Hashtable hints = new Hashtable();hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.Add(EncodeHintType.VERSION_START, 5);Bitmap image = writer.encode(data, BarcodeFormat.QR_CODE, 0x200, 0x200, hints).ToBitmap();//黑白二维码
Bitmap bitmap2 = new Bitmap(image.Width, image.Height, PixelFormat.Format32bppArgb);Graphics graphics = Graphics.FromImage(bitmap2);graphics.SmoothingMode = SmoothingMode.AntiAlias;graphics.DrawImage(image, 0, 0);image.Dispose();Bitmap bitmap3 = QrCodeVertical(bitmap2.Width, bitmap2.Height);//彩色渐变二维码
Color color = Color.FromArgb(200, 224, 114, 1);int num = 140;try{num -= (Encoding.UTF8.GetBytes(data).Length - 20) / 2;}catch (Exception){}int num2 = num;int num3 = num2;for (int i = 0; i < bitmap2.Width; i++){for (int j = 0; j < bitmap2.Height; j++){Color color3;Color pixel = bitmap2.GetPixel(i, j);if ((i < num2) && (j < num3)){color3 = ((pixel.A == 0xff) && (pixel.B == 0)) ? color : pixel;}else{color3 = ((pixel.A == 0xff) && (pixel.B == 0)) ? bitmap3.GetPixel(i, j) : pixel;}bitmap2.SetPixel(i, j, color3);}}bitmap3.Dispose();#region 添加二维码标题string str2 = "";//标题一if (str2.Length < 1){str2 = "MyTest";}float emSize = 32f;emSize -= (str2.Length - 4) * 1.8f;Font font = new Font("微软雅黑", emSize, FontStyle.Bold);SizeF ef = graphics.MeasureString(str2, font);float num7 = (bitmap2.Width - ef.Width) / 2f;Brush brush = new SolidBrush(Color.FromArgb(0xff, 0x3a, 0xb2, 0xc2));Brush brush2 = new SolidBrush(Color.White);int y = 50;graphics.FillRectangle(brush2, new Rectangle((int)num7, y, (int)ef.Width, (int)ef.Height));graphics.DrawString(str2, font, brush, (float)((int)num7), (float)y);Brush brush3 = new SolidBrush(Color.FromArgb(0xff, 0x3a, 0xb2, 0xc2));int width = 140;graphics.FillEllipse(brush2, (bitmap2.Width - width) / 2, (bitmap2.Height - width) / 2, width, width);int num10 = 0x80;graphics.FillEllipse(brush3, (bitmap2.Width - num10) / 2, (bitmap2.Height - num10) / 2, num10, num10);int num11 = 110;graphics.FillEllipse(brush2, (bitmap2.Width - num11) / 2, (bitmap2.Height - num11) / 2, num11, num11);#endregion#region 添加二维码中间内容 str2 = "";//标题二if (str2.Length < 1){str2 = "Test";}float num12 = 32f;num12 -= (str2.Length - 3) * 3.5f;Font font2 = new Font("Meiryo", num12, FontStyle.Bold);ef = graphics.MeasureString(str2, font2);float x = ((bitmap2.Width - ef.Width) / 2f) + 2f;float num14 = ((bitmap2.Height - ef.Height) / 2f) + 8f;graphics.DrawString(str2, font2, brush3, x, num14);graphics.Dispose();#endregionfilepath = System.Web.HttpContext.Current.Server.MapPath(@"~\"+ filepath) + "\\" + filename;//filepath = filepath + filename;System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);bitmap2.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);fs.Close();image.Dispose();return true;}