C#: Printing POS Receipt Directly to Printer

Previously I made the VB.NET version here:

https://rani-irsan.blogspot.com/2019/12/vbnet-printing-pos-receipt-directly-to.html

But there're some requests to make the C# version. So here it is direct printing which is often used to print cashier receipts through the POS (Point of Sales) application.

I created 2 classes for supporting the printing process. These classes also allow us to print images or logos and arrange fonts as desired. The classes can be downloaded using the below link:

• PrintingFormat.cs --> for formatting printing object
• Printer.cs --> for sending a print command Directly to printer

After downloading those 2 files, copy them into your project/solution as in the image below.

Then open the project/solution using Visual Studio. Go to Solution Explorer then click/activate "show all files" as below. After the files are displayed, select and right-click on it --> Include In Project. Now, we're ready to use it.

On UI Design we'll only add a button into the Form1. Printing will be triggered by Button1_Click()

And here is the behind code:

using System;

using System.Windows.Forms;

using System.Drawing;

using System.Data;

namespace CSharpPrinting

{

    public partial class Form1 : Form

    {

        string StoreName = "SERBA ADA STORE";

        string StoreAddress = "Jl. Kehidupan No. 100";

        Image Img = Image.FromFile(@"c:\logo.jpg");

        string TransNo = "TCN10-20191204-001";

        string TransDate = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

        //for item sales | untuk item penjualan

        DataTable dtItem;

        int[] arrWidth;

        StringFormat[] arrFormat;

        //'declaring printing format class

        PrintingFormat c = new PrintingFormat();

        //for subtotal & qty total

        double dblSubtotal = 0;

        double dblQty = 0;

        double dblPayment = 50000;

        public void Data_Load()

        {

            dtItem = new DataTable();

            {

                var withBlock = dtItem.Columns;

                withBlock.Add("itemname", Type.GetType("System.String"));

                withBlock.Add("qty", Type.GetType("System.String"));

                withBlock.Add("price", Type.GetType("System.String"));

            }

            DataRow ItemRow;

            ItemRow = dtItem.NewRow();

            ItemRow["itemname"] = "Taro Snack";

            ItemRow["qty"] = "1";

            ItemRow["price"] = "5000";

            dtItem.Rows.Add(ItemRow);

            ItemRow = dtItem.NewRow();

            ItemRow["itemname"] = "Kopi Ice";

            ItemRow["qty"] = "2";

            ItemRow["price"] = "7000";

            dtItem.Rows.Add(ItemRow);

            ItemRow = dtItem.NewRow();

            ItemRow["itemname"] = "Lolipop";

            ItemRow["qty"] = "5";

            ItemRow["price"] = "1000";

            dtItem.Rows.Add(ItemRow);

        }

        public Form1()

        {

            InitializeComponent();

        }

        private void Button1_Click(object sender, EventArgs e)

        {

            Data_Load();

            SendPrint.NewPrint();

            SendPrint.Print(Img, 100, 50);

            //Setting Font

            SendPrint.SetFont("Courier New", 11, FontStyle.Bold);

            SendPrint.Print(StoreName); //Store Name | Nama Toko

            //Setting Font

            SendPrint.SetFont("Courier New", 8, FontStyle.Regular);

            //Store Address | Alamat Toko

            SendPrint.Print(StoreAddress + ";", new int[]{280}, 0); 

            //spacing

            SendPrint.Print(" ");

            SendPrint.Print(TransNo); // Transaction No | Nomor transaksi

            SendPrint.Print(TransDate); // Trans Date | Tanggal transaksi

            SendPrint.Print(" "); //spacing

            //Setting Font

            SendPrint.SetFont("Courier New", 8, FontStyle.Bold);

            //array for column width | array untuk lebar kolom

            arrWidth = new int[] { 90, 40, 50, 70};

            //array alignment 

            arrFormat = new StringFormat[] { c.MidLeft, c.MidRight,

                                             c.MidRight, c.MidRight }; 

            //column header split by ; | nama kolom dipisah dengan ;

            SendPrint.Print("item;qty;price;subtotal", arrWidth, arrFormat);

            //Setting Font

            SendPrint.SetFont("Courier New", 8, FontStyle.Regular); 

            SendPrint.Print("------------------------------------"); //line

            dblSubtotal = 0;

            dblQty = 0;

            //looping item sales | loop item penjualan

            for (int r = 0; r <= dtItem.Rows.Count - 1; r++)

                {

                  SendPrint.Print(dtItem.Rows[r]["itemname"].ToString() + 

                       ";" + dtItem.Rows[r]["qty"] + ";" +

                       dtItem.Rows[r]["price"] + ";" +

                       (double.Parse(dtItem.Rows[r]["qty"].ToString()) * 

                        double.Parse(dtItem.Rows[r]["price"].ToString())), 

                        arrWidth, arrFormat);

                  dblQty = dblQty + 

                           double.Parse(dtItem.Rows[r]["qty"].ToString());

                  dblSubtotal = dblSubtotal + 

                         (double.Parse(dtItem.Rows[r]["qty"].ToString()) 

                          * double.Parse(dtItem.Rows[r]["price"].ToString()

                          ));

                }

                SendPrint.Print("------------------------------------");

                arrWidth = new int[] { 130, 120 };

                //array for column width | array untuk lebar kolom

                arrFormat = new StringFormat[] { c.MidLeft, c.MidRight };

                //array alignment 

                SendPrint.Print("Total;" + dblSubtotal, arrWidth, arrFormat);

                SendPrint.Print("Payment;" + dblPayment, arrWidth, arrFormat);

                SendPrint.Print("------------------------------------");

                SendPrint.Print("Change;" + 

                                (dblPayment - dblSubtotal).ToString(), 

                                arrWidth, arrFormat);

                SendPrint.Print(" ");

                SendPrint.Print("Item Qty;" + dblQty, arrWidth, arrFormat);

                //Release the job for actual printing

                SendPrint.DoPrint();

        }

    }

}

Let's run and click the button1 to print.

This is the result:

If you want to download the sample project, download it here!