合并图片添加水印并压缩文件提供下载

dotNet疯狂之路No.30

 今天很残酷，明天更残酷，后天很美好，但是绝大部分人是死在明天晚上，只有那些真正的英雄才能见到后天的太阳。

 We're here to put a dent in the universe. Otherwise why else even be here?  

前几天公司急需一批台卡 生成带参数二维码 和背景图片合为一张图片 合成图片还需要加上水印  开始是美工一张张做 几千张哈哈累死美工了 老板要求写个生成功能 所以我就试水了

一、生成二维码部分(一次生成几千张 先保存下来备用)

    /// <summary>
    /// 保存批次二维码至本地//一次生成几千张 先保存下来备用
    /// </summary>
    /// <param name="code"></param>
    /// <param name="name"></param>
    public static void setBatchImg(string strCode, string batch,int i)
    {


        Bitmap bitmap = QRCodeEncoderUtil(strCode);//调用二维码编码方法生成位图

        var ms = new MemoryStream();

        bitmap.Save(ms, ImageFormat.Png);

        String relPath = "/XXXX/XXXX/XXXX/XXXX" + batch + "/";//文件夹路径

        string path = System.Web.HttpContext.Current.Server.MapPath(relPath);

        if (!System.IO.Directory.Exists(path)) //如果文件夹不存在则创建
        {
            System.IO.Directory.CreateDirectory(path);
        }
        Log.WriteLog(path + batch + "_" + i + ".png");
        bitmap.Save(path + batch + "_" + i + ".png", ImageFormat.Png);///二维码保存
         
    }

    /// <summary>  
    /// 生成二维码  
    /// </summary>  
    /// <param name="qrCodeContent">要编码的内容</param>  
    /// <returns>返回二维码位图</returns>  
    public static Bitmap QRCodeEncoderUtil(string qrCodeContent)
    {
        QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
        qrCodeEncoder.QRCodeVersion = 0;/// 数字越大二维码密集度越高

        Bitmap img = qrCodeEncoder.Encode(qrCodeContent, Encoding.UTF8);//指定utf-8编码， 支持中文  
        return img;

    }

二、调整二维码大小(适用背景图片上二维码区域)

 
    string qrPath="XXXX/XXXX/XXXX/XXXX.png";
 
     Bitmap b = new Bitmap(qrPath);
     System.Drawing.Image i = resizeImage(b, new Size(width, height));// 调用调整方法进行调整 返回Image 保存至本地备用
     string rePath = Server.MapPath("XXXXX") + "\XXXX\reqr.png";
     i.Save(rePath);
     i.Dispose();

    //调整图像大小
    private static System.Drawing.Image resizeImage(System.Drawing.Image imgToResize, Size size)
    {
        //获取图片宽度
        int sourceWidth = imgToResize.Width;
        //获取图片高度
        int sourceHeight = imgToResize.Height;

        float nPercent = 0;
        float nPercentW = 0;
        float nPercentH = 0;

        //计算宽度的缩放比例
        nPercentW = ((float)size.Width / (float)sourceWidth);

        //计算高度的缩放比例
        nPercentH = ((float)size.Height / (float)sourceHeight);

        if (nPercentH < nPercentW)
            nPercent = nPercentH;
        else
            nPercent = nPercentW;

        //期望的宽度
        int destWidth = (int)(sourceWidth * nPercent);

        //期望的高度
        int destHeight = (int)(sourceHeight * nPercent);

        Bitmap b = new Bitmap(destWidth, destHeight);
        Graphics g = Graphics.FromImage((System.Drawing.Image)b);
        g.InterpolationMode = InterpolationMode.HighQualityBicubic;

        //绘制图像
        g.DrawImage(imgToResize, 0, 0, destWidth, destHeight);
        g.Dispose();
        imgToResize.Dispose();
        return (System.Drawing.Image)b;
    }

三、合成图片二维码和背景合为一张图片

    //图片合成函数(这里合成两张图片 可累加)
    private void MergeImage(string strBg, string strQr, string name)
    {


        int x = 0;
        int y = 0;


        if (Custom.Value.ToString().Equals("1"))//是否开启自定义
        {
            x = int.Parse(imgx.Value) * 2;
            y = int.Parse(imgy.Value) * 2;
        }
        else
        {
            x = int.Parse(imgx.Value);
            y = int.Parse(imgy.Value);
        }


        // 数组元素个数(即要拼图的图片个数)
        int lenth = 2;
        // 图片集合
        Bitmap[] maps = new Bitmap[lenth];
        //图片对应纵坐标集合
        int[] pointY = new int[lenth];
        //读取本地图片初始化Bitmap
        Bitmap map = null;

        //第一个图片对象，背景图片
        map = new Bitmap(strBg);
        maps[0] = map;
        pointY[0] = 0;


        //第二个图片对象，二维码
        map = new Bitmap(strQr);
        maps[1] = map;
        pointY[1] = y;


        // 初始化背景图片的宽高
        Bitmap bitMap = new Bitmap(maps[0].Width, maps[0].Height);

        // 初始化画板
        Graphics g1 = Graphics.FromImage(bitMap);


        //绘制第一个图片，背景图

        for (int i = 0; i < maps[0].Width; i++)
        {
            for (int j = 0; j < maps[0].Height; j++)
            {
                // 以像素点形式绘制(将要拼图的图片上的每个坐标点绘制到拼图对象的指定位置，直至所有点都绘制完成)
                var temp = maps[0].GetPixel(i, j);
                // 将图片画布的点绘制到整体画布的指定位置
                bitMap.SetPixel(i, pointY[0] + j, temp);
            }
        }

        maps[0].Dispose();

        //绘制第二个图片，二维码
        for (int i = 0; i < maps[1].Width; i++)
        {
            for (int j = 0; j < maps[1].Height; j++)
            {
                var temp = maps[1].GetPixel(i, j);
                bitMap.SetPixel(x + i, pointY[1] + j, temp);
            }
        }

        maps[1].Dispose();
        
　　　　 string batch = batchCode.Value.ToString();


        // 保存输出到本地
        if (!System.IO.Directory.Exists(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/")) //如果文件夹不存在则创建
        {
          System.IO.Directory.CreateDirectory(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/");
        }

        bitMap.Save(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/" + batch + "_" + name + ".png");
        
        g1.Dispose();
        bitMap.Dispose();

    }

四、添加水印

    /// <summary>
    /// 水印文字
    /// </summary>
    /// <param name="fileName"></param>
    /// <param name="text"></param>
    private void AddTextToImg(string fileName, string text)
    {

        int x = 0;
        int y = 0;


        if (Custom.Value.ToString().Equals("1"))//是否开启自定义
        {
            x = int.Parse(ztimgx.Value) * 2;
            y = int.Parse(ztimgy.Value) * 2;
        }
        else
        {
            x = int.Parse(ztimgx.Value);
            y = int.Parse(ztimgy.Value);
        }

        if (text == string.Empty)
        {
            return;
        }
        //还需要判断文件类型是否为图像类型，这里就不赘述了

        System.Drawing.Image image = System.Drawing.Image.FromFile(fileName);
        Bitmap bitmap = new Bitmap(image, image.Width, image.Height);
        Graphics g = Graphics.FromImage(bitmap);

        float fontSize = 55.0f;    //字体大小
        float textWidth = text.Length * fontSize;  //文本的长度
        //下面定义一个矩形区域，以后在这个矩形里画上白底黑字
        float rectX = x;
        float rectY = y;
        float rectWidth = text.Length * (fontSize);
        float rectHeight = fontSize + 18;
        //声明矩形域
        RectangleF textArea = new RectangleF(rectX, rectY, rectWidth, rectHeight);

        Font font = new Font("宋体", fontSize);   //定义字体
        Brush whiteBrush = new SolidBrush(Color.Black);   //黑笔刷，画文字用
        Brush blackBrush = new SolidBrush(Color.White);   //白笔刷，画背景用

        g.FillRectangle(blackBrush, rectX, rectY, rectWidth, rectHeight);

        g.DrawString(text, font, whiteBrush, textArea);


        string batch = batchCode.Value.ToString();

            // 保存输出到本地
            if (!System.IO.Directory.Exists(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/")) //如果文件夹不存在则创建
            {
                System.IO.Directory.CreateDirectory(Server.MapPath("XXXX") + "/XXXX/XXXX" + batch + "/");
            }

            bitmap.Save(Server.MapPath("XXXX") + "/XXXX/XXXXX" + batch + "/" + batch + "_" + text + ".png");
        
        g.Dispose();
        bitmap.Dispose();
        image.Dispose();
    }

五、调取所有方法进行合成

    /// <summary>
    /// 生成批次台卡生成压缩包
    /// </summary>
    private void CreateBatchImg()
    {

        string batch = "XXXXX.png";

            string bgPath = "";

            int width = 0;

            int height = 0;

            for (int j = 0; j < 3000; j++)
            {
                
                     
                    setBatchImg("生成二维码的参数", batch, j);///保存图片至本地
                     
                    string qrPath = Server.MapPath("XXXX") + "\XXXX\XXXX" + batch + "\" + batch + "_" + j + ".png";
                    
                        bgPath = Server.MapPath("XXXXX") + "\" +XXXX + ".png";
                        width = int.Parse(imgwith.Value);
                        height = int.Parse(imgheight.Value);
                   
                    //调整二维码大小
                    Bitmap b = new Bitmap(qrPath);
                    System.Drawing.Image i = resizeImage(b, new Size(width, height));
                    string rePath = Server.MapPath("XXXX") + "\XXXX\reqr.png";
                    i.Save(rePath);
                    i.Dispose();
                    MergeImage(bgPath, rePath, j.ToString());
                    AddTextToImg(Server.MapPath("Images") + "/TemQrErBatch" + batch + "/" + batch + "_" + j + ".png", j.ToString());

                  
                }

            }


            

            string relPath = "/XXXX/XXXX/XXXX/XXXXX" + batch + "/";

            string relPath2 = "/XXXX/XXXX/XXXX/";


            string path =  Server.MapPath(relPath);
            string path2 =  Server.MapPath(relPath2);//压缩路径

            if (!Directory.Exists(path))
            {
                // Create the directory it does not exist.
                Directory.CreateDirectory(path);
            }

            if (System.IO.Directory.Exists(path)) //如果文件夹不存在则创建
            {
                string[] FileProperties = new string[2];
                FileProperties[0] = path;//待压缩文件目录 
                FileProperties[1] = path2 + "XXXX" + batch + ".zip";  //压缩后的目标文件
 
                ZipFloClass.ZipFiles(FileProperties[0], FileProperties[1]);
                
            }
 
            ZipUrl.Value = "XXXX/XXXX/XXXX" + batch + ".zip";
 
    }