128条形码计算，利用Code 128字体实现条码打印

此方法利用Code 128字体实现条码打印，所以需要提前安装Code 128字体，下载地址如下：
http://pan.baidu.com/share/link?shareid=1787017019&uk=2382364834

        /// <summary>

        /// 获取128条码数据

        /// </summary>

        private string Get128CodeString(string inputData)

        {

            string result;

            //计算校验位

            int checksum = 104;

            for (int ii = 0; ii < inputData.Length; ii++)

            {

                if (inputData[ii] >= 32)

                {

                    checksum += (inputData[ii] - 32) * (ii + 1);

                }

                else

                {

                    checksum += (inputData[ii] + 64) * (ii + 1);

                }

            }

            checksum = checksum % 103;

            if (checksum < 95)

            {

                checksum += 32;

            }

            else

            {

                checksum += 100;

            }

            //条码由开始位、数据、校验位、停止位组成

            result = Convert.ToChar(204) + inputData.ToString() + Convert.ToChar(checksum) + Convert.ToChar(206);

            return result;

        }



        /// <summary>

        /// 打印条形码

        /// </summary>

        public void PrintBarCode()

        {

            PrintDocument printDoc = new PrintDocument();

            StandardPrintController controler = new StandardPrintController();



            printDoc.PrintPage += new PrintPageEventHandler(this.PrintCustom);

            printDoc.PrintController = controler;

            printDoc.Print();

        }



        /// <summary>

        /// 事件：打印设置

        /// </summary>

        public void PrintCustom(Object Sender, PrintPageEventArgs e)

        {

            Font ft1 = new System.Drawing.Font("Times New Roman", 18, FontStyle.Regular, GraphicsUnit.World);

            Font ft2 = new System.Drawing.Font("Code 128", 64, FontStyle.Regular, GraphicsUnit.World);

            Brush br = new SolidBrush(Color.Black);

            Margins margins = new Margins(50, 50, 50, 145);



            e.PageSettings.Margins = margins;

            e.Graphics.DrawString(this.Get128CodeString(m_InputString), ft2, br, 50, -3);

            e.Graphics.DrawString(this.m_InputString, ft1, br, 110, 60);

            e.HasMorePages = false;

        }