使用ThoughtWorks.QRCode生成，利用这个库来生成带Logo的二维码（就是中间嵌了一个图片的二维码），直接见代码：
HttpContext context = HttpContext.Current;
String data = "二维码的内容";//如果是链接会跳转
if (!string.IsNullOrEmpty(data))
{
QRCodeEncoder encoder = new QRCodeEncoder();
Bitmap imgBack = encoder.Encode(data, System.Text.Encoding.UTF8);
Image logoImg = Image.FromFile(context.Server.MapPath("~/images/1.png"));
System.Drawing.Image bitmap = new System.Drawing.Bitmap(, );
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
g.DrawImage(imgBack, , , , );
g.DrawImage(logoImg, - , - , , );
bitmap.Save(context.Server.MapPath("~/images/2.png"));
}