c# 仿微信二维码生成二维码中间显示头像

/// <summary>
/// 生成二维码.
/// </summary>
/// <param name="data">需要添加进去的文本</param>
/// <returns></returns>
public System.Drawing.Image GCode(String data)
{
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

qrCodeEncoder.QRCodeScale = 5;
qrCodeEncoder.QRCodeVersion = 7;

qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
var pbImg = qrCodeEncoder.Encode(data, System.Text.Encoding.UTF8);
var width = pbImg.Width / 10;
var dwidth = width * 2;
Bitmap bmp = new Bitmap(pbImg.Width + dwidth, pbImg.Height + dwidth);
Graphics g = Graphics.FromImage(bmp);
var c = System.Drawing.Color.White;
g.FillRectangle(new SolidBrush(c), 0, 0, pbImg.Width + dwidth, pbImg.Height + dwidth);
g.DrawImage(pbImg, width, width);
g.Dispose();
return bmp;
}

/// <summary>
/// 调用此函数后使此两种图片合并，类似相册，有个
/// 背景图，中间贴自己的目标图片
/// </summary>
/// <param name="sourceImg">粘贴的源图片</param>
/// <param name="destImg">粘贴的目标图片</param>
public static System.Drawing.Image CombinImage(System.Drawing.Image imgBack, string destImg)
{

System.Drawing.Image img = System.Drawing.Image.FromFile(destImg);        //照片图片
if (img.Height != 50 || img.Width != 50) {
img = KiResizeImage(img, 50, 50, 0);
}
Graphics g = Graphics.FromImage(imgBack);

g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);      //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高);

//g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框

//g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高);

g.DrawImage(img, imgBack.Width / 2 - img.Width / 2, imgBack.Width / 2 - img.Width / 2 , img.Width, img.Height);
GC.Collect();
return imgBack;
}

/// <summary>
/// Resize图片
/// </summary>
/// <param name="bmp">原始Bitmap</param>
/// <param name="newW">新的宽度</param>
/// <param name="newH">新的高度</param>
/// <param name="Mode">保留着，暂时未用</param>
/// <returns>处理以后的图片</returns>
public static System.Drawing.Image KiResizeImage(System.Drawing.Image bmp, int newW, int newH, int Mode)
{
try
{
System.Drawing.Image b = new Bitmap(newW, newH);
Graphics g = Graphics.FromImage(b);

// 插值算法的质量
g.InterpolationMode = InterpolationMode.HighQualityBicubic;

g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
g.Dispose();

return b;
}
catch
{
return null;
}

}

调用
CombinImage(GCode(Text), linkpath).Save(SavePath);