ESCPOS 1.2.4

ESCPOS

A ESC/POS Printer Commands Helper.

Installing via NuGet Package

The NuGet Package can be found here and you can install it with:

PM> Install-Package ESCPOS

Usage

All command methods will return a byte array that you should concatenate with the bytes of your data, and then send it all to your printer using the Print extension method, which will send a byte array to the informed printer address. It can be something like COM3, LPT1, \\127.0.0.1\printer, 192.168.0.100:9100, etc. or even a path to a text file like ./print.txt.

There is also 2 extension methods, Add and ToBytes, located in the namespace ESCPOS.Utils. The first one can be used in byte arrays, so you can concatenate 2 or more byte arrays just like this:

byte[] result = array1.Add(array2, array3, ..., arrayN);

In addition there's an overload to the mentioned Add method that will accept string parameters instead of byte arrays. It appends all strings into one new string and then converts it to a byte array. And yet another overload to accept the mix of byte arrays and strings parameters, but since it's accepting an object type parameter, this will ignore any parameter that is not string or byte[] (e.g. int).

With ToBytes method you can convert a UTF-8 string to a byte array:

byte[] result = "Some string".ToBytes();

Alternatively you can choose whatever Encoding you wish to use for that:

byte[] result = "汉字".ToBytes(Encoding.GetEncoding("GBK"));

*Just make sure your Printer has a corresponding CodePage for that Encoding!

Examples

All examples will assume the using statements below:

using static ESCPOS.Commands;
using ESCPOS;
using ESCPOS.Utils;

QRCode

byte[] qrCodeCommand = QRCode("Some data");
qrCodeCommand.Print("COM2");

Or using the Extension Method

string data = "Some data";
data.ToQRCode().Print("COM2");

Barcode

byte[] barCodeCommand = Barcode(BarCodeType.EAN13, "9780201379624");
barCodeCommand.Print("192.168.0.100:9100");

Or using the Extension Method

string code = "9780201379624";
code.ToBarcode(BarCodeType.EAN13).Print("192.168.0.100:9100");

Formatted Text

byte[] cmd = AlignToCenter.Add(CharSizeDoubleHeight, "Fancy Title");
cmd.Print("\\127.0.0.1\printer");