.NET中生成带Logo的二维码

// 1.设置QR二维码的规格

ZXing.QrCode.QrCodeEncodingOptions qrEncodeOption = new ZXing.QrCode.QrCodeEncodingOptions();

qrEncodeOption.CharacterSet = "UTF-8"; // 设置编码格式，否则读取'中文'乱码

qrEncodeOption.Height = 200;

qrEncodeOption.Width = 200;

qrEncodeOption.Margin = 1; // 设置周围空白边距

 

// 2.生成条形码图片

ZXing.BarcodeWriter wr = new BarcodeWriter();

wr.Format = BarcodeFormat.QR_CODE; // 二维码

wr.Options = qrEncodeOption;

Bitmap img = wr.Write(this.ContentTxt.Text);

 

// 3.在二维码的Bitmap对象上绘制logo图片

Bitmap logoImg = Bitmap.FromFile(System.AppDomain.CurrentDomain.BaseDirectory + "\\\\logo.jpg") as Bitmap;

Graphics g = Graphics.FromImage(img);

Rectangle logoRec = new Rectangle(); // 设置logo图片的大小和绘制位置

logoRec.Width = img.Width / 6;

logoRec.Height = img.Height / 6;

logoRec.X = img.Width / 2 - logoRec.Width / 2; // 中心点

logoRec.Y = img.Height / 2 - logoRec.Height / 2;

g.DrawImage(logoImg, logoRec);

 

// 4.保存绘制后的图片

string filePath = System.AppDomain.CurrentDomain.BaseDirectory + "\\\\QR-" + this.ContentTxt.Text + ".jpg";

img.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);