print to dotmatrix printer

class clsPrintSettings
       {
           // Printing commands are depends on the Dotmatrix printer that we are using

           System.IO.StreamWriter rdr;
           private string Bold_On = "";
           private string Bold_Off = "";
           private string Width_On = ""; //Chr(27) + Chr(87) + Chr(49) 'W1
           private string Width_Off = "";
           public string BillType;
           public string BillNo;
           public string BillDt;
           public string tran_type;
           public string Discount;
           public string bill_amt;
           public string NetAmount;
           public string reciept_amount;
           public decimal MRPTotal = 0, SavedTotal = 0;
           public decimal count;
           public System.Data.DataTable dt_print;

           public clsPrintSettings()
           {
               rdr = new System.IO.StreamWriter("bill.txt");
           }
           public void Close()
           {
               rdr.Close();
           }
           public void PrintHeader()
           {
               rdr.WriteLine(Bold_On + "HotelApps, KERALA" + Bold_Off);
               PrintLine();
               rdr.WriteLine("Bill NO   : " + BillNo);
               rdr.WriteLine("Bill Date : " + BillDt);
               PrintLine();
               rdr.WriteLine(Bold_On + Width_On + BillType + Width_Off + Bold_Off);
               PrintLine();
           }

           public void PrintDetails()
           {
               rdr.WriteLine("   SLNo  |     Item Name |     Quantity  |       Amount  |        Total  |");
               int i;
               PrintLine();
               for (i = 0; i < count - 1; i++)
               {
                   rdr.Write("{0,10}", GetFormatedText(dt_print.Rows[i][0].ToString(), 10) + "|");
                   rdr.Write("{0,16}", GetFormatedText(dt_print.Rows[i][1].ToString(), 10) + "|");
                   rdr.Write("{0,16}", GetFormatedText(dt_print.Rows[i][2].ToString(), 10) + "|");
                   rdr.Write("{0,16}", GetFormatedText(dt_print.Rows[i][3].ToString(), 10) + "|");
                   rdr.Write("{0,16}", GetFormatedText(dt_print.Rows[i][4].ToString(), 10) + "|");
                   rdr.WriteLine("");
               }
           }

           private string GetFormatedText(string Cont, int Length)
           {
               int rLoc = Length - Cont.Length;
               if (rLoc < 0)
               {
                   Cont = Cont.Substring(0, Length);
               }
               else
               {
                   int nos;
                   for (nos = 0; nos < 3; nos++)
                       Cont = Cont + " ";
               }
               return (Cont);
           }

           public void PrintFooter()
           {
               PrintLine();
               rdr.WriteLine();
               rdr.WriteLine("                                                 Total          : " + bill_amt);
               rdr.WriteLine("                                                 Discount       : " + Discount);
               rdr.WriteLine("                                                 Net Amount     : " + NetAmount);
               rdr.WriteLine("                                                 Reciept Amount : " + reciept_amount);
               rdr.WriteLine();
               PrintLine();
               rdr.WriteLine("Transaction Type : " + tran_type);
               PrintLine();
               rdr.WriteLine("Thank You");
               PrintLine();
           }

           public void PrintLine()
           {
               int i;
               string Lstr = "";
               for (i = 1; i <= 75; i++)
               {
                   Lstr = Lstr + "-";
               }
               rdr.WriteLine(Lstr);
           }

           public void SkipLine(int LineNos)
           {
               int i;
               for (i = 1; i <= 5; i++)
               {
                   rdr.WriteLine("");
               }
           }
       }

       private void PrintBill()
       {
           if (MessageBox.Show("Do You want to Print the Bill", "Sales Bill", MessageBoxButtons.OKCancel) == DialogResult.OK)
           {
               clsPrintSettings obj = new clsPrintSettings();
               obj.BillType = "RECIEPT";
               obj.BillNo = lbl_bill_no1.Text;
               obj.BillDt = lbl_bill_date.Text;
               obj.tran_type = comboBox1.Text;
               obj.bill_amt = txt_bill_amt.Text;
               obj.Discount = txt_discount.Text;
               obj.NetAmount = txt_net_amt.Text;
               obj.reciept_amount = txt_reci_amt.Text;
               DataTable dt1_print = new DataTable();
               dt1_print.Columns.Add(new DataColumn("SLNo", typeof(string)));
               dt1_print.Columns.Add(new DataColumn("Item_Name", typeof(string)));
               dt1_print.Columns.Add(new DataColumn("Quantity", typeof(string)));
               dt1_print.Columns.Add(new DataColumn("Amount", typeof(string)));
               dt1_print.Columns.Add(new DataColumn("Total", typeof(string)));
               DataRow newrow = dt1_print.NewRow();
               obj.count = dgrid_kot_entry.RowCount;
               for (int i = 0; i < dgrid_kot_entry.RowCount - 1; i++)
               {
                   DataRow dr = dt1_print.NewRow();
                   dr["SLNo"] = dgrid_kot_entry.Rows[i].Cells[0].Value;
                   dr["Item_Name"] = dgrid_kot_entry.Rows[i].Cells[2].Value;
                   dr["Quantity"] = dgrid_kot_entry.Rows[i].Cells[3].Value;
                   dr["Amount"] = dgrid_kot_entry.Rows[i].Cells[4].Value;
                   dr["Total"] = dgrid_kot_entry.Rows[i].Cells[5].Value;
                   dt1_print.Rows.Add(dr);
               }
               obj.dt_print = dt1_print;
               obj.PrintHeader();
               obj.PrintDetails();
               obj.PrintFooter();
               obj.SkipLine(3);
               obj.Close();
               obj = null;
           }
       }