生成二维码的webservice(可以加logo图片)

最近搞了个生成二维码的webservice，支持中文，都是利用网上的方法，自己组装了一下。

组件：ThoughtWorks.QRCode.dll

webservice：

using System;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;

using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using ThoughtWorks.QRCode.Codec.Util;

using System.Drawing;
using System.Drawing.Imaging;

using System.IO;

/// <summary>
/// MSGQRCode 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class MSGQRCode : System.Web.Services.WebService
{
    public MSGQRCode()
    {
        //如果使用设计的组件，请取消注释以下行
        //InitializeComponent();
    }
    [WebMethod]
    public string CreateQRCode(string url)
    {
        if (string.IsNullOrEmpty(url))
        {
            return "";
        }
        QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
        qrCodeEncoder.QRCodeEncodemode = QRCodeEncoder.ENCODE_MODE.BYTE;
        qrCodeEncoder.QRCodeScale = 4;
        qrCodeEncoder.QRCodeVersion = 8;
        qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
        try
        {
            String ls_fileName = DateTime.Now.ToString("yyyyMMddhhmmss") + ".png";
            String ls_savePath = Server.MapPath("../") + "/QRCodeImages/" + ls_fileName;
            qrCodeEncoder.Encode(url,System.Text.Encoding.UTF8).Save(ls_savePath);
            ImageWatermark(Server.MapPath("../QRCodeImages/" + ls_fileName),Server.MapPath("../shuiyin.jpg"),"C");
            return "QRCodeImages/" + ls_fileName;
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
    }
    /// <summary>
    /// 图片水印处理方法
    /// </summary>
    /// <param name="path">需要加载水印的图片路径（绝对路径）</param>
    /// <param name="waterpath">水印图片（绝对路径）</param>
    /// <param name="location">水印位置（传送正确的代码）</param>
    /// <returns></returns>
    private string ImageWatermark(string path,string waterpath,string location)
    {
        //获取文件扩展名
        string kz_name = Path.GetExtension(path);
        //暂时只支持给.JPG,.BMP,.JPEG格式加水印
        if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg" || kz_name == ".png")
        {
            //设置新的文件名
            DateTime time = DateTime.Now;
            string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();
            //加载需要加载水印的图片
            Image img = Bitmap.FromFile(path);
            //加载水印图片
            Image waterimg = Image.FromFile(waterpath);

            //添加水印
            Graphics g = Graphics.FromImage(img);
            //获取水印位置设置
            ArrayList loca = new ArrayList();
            int x = 0;
            int y = 0;
            x = img.Width / 2 - waterimg.Width / 2;
            y = img.Height / 2 - waterimg.Height / 2;
            loca.Add(x);
            loca.Add(y);

            g.DrawImage(waterimg,new Rectangle(int.Parse(loca[0].ToString()),int.Parse(loca[1].ToString()),waterimg.Width,waterimg.Height));             //释放资源             waterimg.dispose();             g.dispose();             //保存水印图片             string newpath = Path.GetDirectoryName(path) + filename + kz_name;             img.Save(newpath);             img.dispose();             //将水印复制到原有图片             //将水印图片替换原有图片             File.copy(newpath,path,true);             //删除水印             if (File.Exists(newpath))             {                 File.Delete(newpath);             }         }         return path;     } }