批量打印并下载二维码

        //批量打印二维码
        public string PrintQRCode()
		{
			try
			{
                using (QiMeiEntities dbContext = new QiMeiEntities())
                {
                    string filepath = AppDomain.CurrentDomain.BaseDirectory + "file\\Img\\";
                    CreatFile(filepath);
                    var arr = dbContext.Basics_Device.ToList();
                    if (arr != null)
                    {
                        if (!Directory.Exists(filepath))
                        {
                            Directory.CreateDirectory(filepath);
                        }
                        foreach (var model in arr)
                        {
                            string path = filepath + (model.DeviceName.ToString() + "(" + model.Number.ToString() + ")").Replace("/", "-") + ".jpg";
                            FileInfo file = new FileInfo(path);
                            if (!file.Exists)
                            {
                                CreateQRImg(model.ID.ToString(), model.DeviceName, model.Number);
                            }
                        }
                        ZipHelper.ZipDirectory(filepath, AppDomain.CurrentDomain.BaseDirectory + "file\\qdcode.zip", "");
                    }
                }
			}
			catch (Exception ex)
			{
				LogHelper.Error(this.GetType(), "运行错误：" + ex.Message);
			}
			return "file\\qdcode.zip";
		}

　　

//创建文件夹
        public void CreatFile(string path)
        {
            try
            {
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
            }
            catch (Exception e)
            {
                LogHelper.Error(this.GetType(), "运行错误：" + e.Message);
            }
        }

　　

/// <summary>

        /// 生成并保存二维码图片的方法

        /// </summary>

        /// <param name="str">输入的内容</param>

        private void CreateQRImg(string str,string name,string code)
        {
            try
            {
                Bitmap bt;

                string EncoderStr = str;

                //生成设置编码实例

                QRCodeEncoder QRcode = new QRCodeEncoder();

                //设置二维码的规模，默认4

                QRcode.QRCodeScale = 4;

                //设置二维码的版本，默认7

                QRcode.QRCodeVersion = 7;

                //设置错误校验级别，默认中等

                QRcode.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

                //设置二维码的背景色

                QRcode.QRCodeBackgroundColor = Color.White;

                //设置二维码的前景色

                QRcode.QRCodeForegroundColor = Color.Black;


                //生成二维码图片

                bt = QRcode.Encode(EncoderStr, Encoding.UTF8);

                //二维码图片的名称

                string filename = name + "(" + code + ")";

                ImageUtility util = new ImageUtility();

                bt = util.InsertWords(new Bitmap(new Bitmap(bt)), filename);

                //保存二维码图片在photos路径下

                if (!Directory.Exists(AppDomain.CurrentDomain.BaseDirectory + "file\\Img\\" + filename + ".jpg"))
                {
                    bt.Save(AppDomain.CurrentDomain.BaseDirectory + "file\\Img\\" + filename.Replace("/","-") + ".jpg");

                    bt.Dispose();
                }
            }
            catch(Exception ex)
            {
                LogHelper.Error(this.GetType(), "运行错误：" + ex.Message);
            }
        }