生成群二维码图片代码：

string AppPath=Server.MapPath("~/cc/res/碳化硅黑体.ttf");

//读取字体文件

PrivateFontCollection pfc=new PrivateFontCollection();

pfc.AddFontFile(AppPath);

//实例化字体样式

Font font=new Font(pfc.Families[0], 36);

string text=queryText;

string path=Server.MapPath("~/cc/res/ewm333.jpg");

Bitmap mp=new Bitmap(path);

Graphics graphics=Graphics.FromImage(mp);

using (Graphics g=Graphics.FromImage(mp))

{

g.SmoothingMode=System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

g.TextRenderingHint=System.Drawing.Text.TextRenderingHint.AntiAlias;

g.DrawString(text, font, Brushes.Black, new PointF(194, 92));

}

MemoryStream stream=new MemoryStream();

mp.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);

byte[] mydata=new byte[stream.Length];

mydata=stream.ToArray();

stream.Close();

Response.BinaryWrite(mydata);//将图片输出在页面上

Response.ContentType="image/JPEG";

Response.End();