C# MVC 生成带LOGO的二维码并返回到客户端
使用zxing开源库
0积分下载地址：http://download.csdn.net/detail/hejisan/9846307
创建二维码并叠加拼合logo的QRCode.cs类：
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using ZXing;
using ZXing.QrCode;
using ZXing.QrCode.Internal;
namespace HalfBuy.Biz.Utilities
{
public class QRCodeHelper
{
///
/// 将图片按一定的比例压缩
///
/// 资源图片
/// 高度
/// 宽度
///
/// 生成二维码
///
/// 需要生成二维码的内容
/// 二维码图片长宽大小
///
/// 合并用户QR图片和用户头像
///
/// QR图片（二维码图片）
/// 用户头像
/// 缩放比例
///
/// 创建圆角矩形
///
/// 区域
/// 圆角角度
///
/// 图片按比例缩放
///
private static Image ZoomPic(Image initImage, double n)
{
//缩略图宽、高计算
double newWidth = initImage.Width;
double newHeight = initImage.Height;
newWidth = n * initImage.Width;
newHeight = n * initImage.Height;
//生成新图
//新建一个bmp图片
System.Drawing.Image newImage = new System.Drawing.Bitmap((int)newWidth, (int)newHeight);
//新建一个画板
System.Drawing.Graphics newG = System.Drawing.Graphics.FromImage(newImage);
//设置质量
newG.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
newG.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//置背景色
newG.Clear(Color.Transparent);
//画图
newG.DrawImage(initImage, new System.Drawing.Rectangle(0, 0, newImage.Width, newImage.Height), new System.Drawing.Rectangle(0, 0, initImage.Width, initImage.Height), System.Drawing.GraphicsUnit.Pixel);
newG.Dispose();
return newImage;
}
#endregion
}
}
MVC C#控制器方法生成url二维码及从网络请求logo的Action:
public FileResult GetImage()
{
string myshareurl = Config.ShareUrl;//+ UserService.myShareParameter();
string content = myshareurl;
Bitmap bitmap = QRCodeHelper.Create(content, 400);
string filename = DateTime.Now.ToFileTime().ToString();
Uri uri = new Uri(UserService.SessionUser.headimgurl);
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(uri);
System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)request.GetResponse();
System.IO.Stream resStream = response.GetResponseStream();
Bitmap sourcebm = new Bitmap(resStream);//初始化Bitmap图片
Bitmap qrAndHeaderBitmap = QRCodeHelper.MergeQrImg(bitmap, sourcebm);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
qrAndHeaderBitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
//qrAndHeaderBitmap.Save(saveFileUrl, System.Drawing.Imaging.ImageFormat.Png);
qrAndHeaderBitmap.Dispose(); //释放资源
bitmap.Dispose();
return new FileContentResult(ms.ToArray(), "image/Png");
//or like below
//MemoryStream mem = new MemoryStream(image, 0, image.Length);
//return new FileStreamResult(mem, "image/jpg");
}MVC 视图请求图片：
Over!