关于c#打印的疑义

关于c#打印的疑问
现在急求啊，先上原有的代码，

C# code

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Drawing.Printing;using System.Windows.Forms;namespace Code128Test{    public partial class FrmTest : Form    {        string inputString;        int length=0;        public FrmTest()        {            InitializeComponent();        }        private string Get128CodeString(string inputData)        {            string result;            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;            }            result = Convert.ToChar(204) + inputData.ToString() + Convert.ToChar(checksum) + Convert.ToChar(206);            return result;        }        public void PrintLable()        {            PrintDocument pd = new PrintDocument();            StandardPrintController controler = new StandardPrintController();            try            {                pd.PrintPage += new PrintPageEventHandler(this.PrintCustomLable);                pd.PrintController = controler;                pd.Print();                return;            }            catch (Exception err)            {                Console.WriteLine(err.Message);                return;            }            finally            {                pd.Dispose();            }        }        public void PrintCustomLable(Object Sender, PrintPageEventArgs av)        {            int tmdx = Convert.ToInt32(this.textBox2.Text);            int tmX = Convert.ToInt32(this.textBox3.Text);            int tmY = Convert.ToInt32(this.textBox4.Text);            int zhX = Convert.ToInt32(this.textBox5.Text);            int zhY = Convert.ToInt32(this.textBox6.Text);            Font ft3 = new System.Drawing.Font("黑体", 18, FontStyle.Bold, GraphicsUnit.World);            Font ft4 = new System.Drawing.Font("黑体", 17, FontStyle.Bold, GraphicsUnit.World);            Font ft7 = new System.Drawing.Font("黑体", 14, FontStyle.Bold, GraphicsUnit.World);            Font ft6 = new System.Drawing.Font("Times New Roman", 12, FontStyle.Regular, GraphicsUnit.World);            Font ft1 = new System.Drawing.Font("Times New Roman", 12, FontStyle.Regular, GraphicsUnit.World);            Font ft2 = new System.Drawing.Font("Code 128", 24, FontStyle.Regular, GraphicsUnit.World);            Font ft5 = new System.Drawing.Font("黑体", 11, FontStyle.Regular, GraphicsUnit.World);            Brush br = new SolidBrush(Color.Black);            Margins margins = new Margins(0, 0, 0, 0);            av.PageSettings.Margins = margins;            av.Graphics.DrawString("我们的爱", ft3, br, 30, 58);            av.Graphics.DrawString("GPRS", ft4, br, 30, 78);            av.Graphics.DrawString("模块", ft7, br, 67,79);            av.Graphics.DrawString("CMIIT ID:", ft6, br, 29, 96);            av.Graphics.DrawString("IMEI:" + inputString, ft1, br, 29, 122);            av.Graphics.DrawString(Get128CodeString(inputString.Replace("IMEI:", "")), ft2, br, 22, 133);            av.Graphics.DrawString("科技有限公司", ft5, br, 29, 158);            av.HasMorePages = false;        }        private void btnPrint_Click(object sender, EventArgs e)        {            try            {                inputString = txtInput.Text;                length = Convert.ToInt32(this.textBox1.Text);                inputString = (Convert.ToInt64(Convert.ToInt64(inputString.Replace("IMEI:", "")) )- 1).ToString();                for (int  i = 0; i < length; i++)                {                    inputString =  (Convert.ToInt64(inputString) + 1).ToString();                    //inputString = (100 + i).ToString();                    lblBarCode.Text = Get128CodeString(inputString);                    //MessageBox.Show(inputString);                    PrintLable();                }            }            catch            {                MessageBox.Show("您输入的数字不对！");            }        }    }} 
 

C# code

Image image = Image.FromFile("my.jpg");    Point pi = new Point(x, y);    av.Graphics.DrawImage(newImage, pi);