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 ESCPOSUsage
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.
The Print extension method will send a byte array to the informed printer address, which 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 an Add and ToBytes extension methods located in the namespace ESCPOS.Utils.
The first one for byte arrays, you can use it to concatenate 2 or more byte arrays just like this:
byte[] result = array1.Add(array2, array3, ..., arrayN);There's also an overload to accept string parameters instead of byte arrays. It appends all strings into one new string and then converts it to a byte array.
And an overload to accept the mix of byte arrays and strings parameters, since it's accepting object type parameters, this will ignore any parameter that is not one of them (e.g. int).
The second for strings, you can use it to convert a UTF-8 string to a byte array:
byte[] result = "Some string".ToBytes();Examples
All examples will assume the using statements below:
using static ESCPOS.Commands;
using ESCPOS;
using ESCPOS.Utils;QRCode
byte[] qrCodeCommand = PrintQRCode("Some data");
qrCodeCommand.Print("COM2");Barcode
byte[] barCodeCommand = PrintBarCode(BarCodeType.EAN13, "9780201379624");
barCodeCommand.Print("192.168.0.100:9100");Full CFe SAT Receipt
This example will assume that the variable cfe is a deserialized object from the CFe XML, and will print the receipt using its fields.
Also this example will print a 32 columns receipt, which is ideal for 56mm paper roll.
var line = "--------------------------------";
byte[] array = LF;
array = array.Add(SelectCharSizeHeight(CharSizeHeight.Double), SelectJustification(Justification.Center));
if (cfe.infCFe.emit.xFant != null)
array.Add(cfe.infCFe.emit.xFant);
array.Add(LF, SelectCharSizeHeight(CharSizeHeight.Normal), cfe.infCFe.emit.xNome,
LF, $"{cfe.infCFe.emit.enderEmit.xLgr},{cfe.infCFe.emit.enderEmit.nro} {cfe.infCFe.emit.enderEmit.xBairro} - {cfe.infCFe.emit.enderEmit.xMun} {cfe.infCFe.emit.enderEmit.CEP}",
LF, $"CNPJ: {cfe.infCFe.emit.CNPJ}",
LF, $"IE: {cfe.infCFe.emit.IE}",
LF, line, SelectCharSizeHeight(CharSizeHeight.Double), $"Extrato No. {cfe.infCFe.ide.nCFe}",
LF, "CUPOM FISCAL ELETRONICO - SAT", SelectCharSizeHeight(CharSizeHeight.Normal),
LF, LF);
if (!string.IsNullOrEmpty(cfe.infCFe.dest?.Item))
array.Add(line, "CPF/CNPJ do Consumidor:", cfe.infCFe.dest.Item, LF);
array.Add(line, "#|COD|DESC|QTD|UN|VL UNIT R$|(VL TRIB R$)*|VL ITEM R$",
LF, line, SelectJustification(Justification.Left));
int i = 1;
foreach (var det in cfe.infCFe.det)
{
string prod = $"{det.prod.cProd} {det.prod.xProd} {det.prod.qCom:0.0##} {det.prod.uCom} X {det.prod.vUnCom:0.00#} {((det.imposto?.vItem12741 ?? 0) == 0 ? "" : $"({det.imposto.vItem12741:f2})*")}";
array.Add($" {i++:D3} ");
while (prod.Length > 20)
{
var wrap = prod.Length >= 20 ? prod.Substring(0,20) : prod;
array.Add(wrap), LF, " ");
prod = prod.Substring(20);
}
array.Add(prod.PadRight(20), det.prod.vProd.ToString("f2").PadLeft(6), LF);
}
array.Add(LF);
if (cfe.infCFe.total.ICMSTot.vDesc > 0)
array.Add($" Desconto R${cfe.infCFe.total.ICMSTot.vDesc.ToString("f2").PadLeft(19)}", LF);
if (cfe.infCFe.total.ICMSTot.vOutro > 0)
array.Add($" Acrescimo R${cfe.infCFe.total.ICMSTot.vOutro.ToString("f2").PadLeft(18)}", LF);
array.Add(SelectCharSizeHeight(CharSizeHeight.Double), $" TOTAL R${cfe.infCFe.total.vCFe.ToString("f2").PadLeft(22)}", LF,
SelectCharSizeHeight(CharSizeHeight.Normal), LF);
foreach (var mp in cfe.infCFe.pgto.MP)
{
string description;
switch (Convert.ToInt32(mp.cMP ?? "1"))
{
case 2:
description = "Cheque";
break;
case 3:
description = "Cartao de Credito";
break;
case 4:
description = "Cartao de Debito";
break;
case 5:
description = "Credito na Loja";
break;
case 10:
description = "Vale Alimentacao";
break;
case 11:
description = "Vale Refeicao";
break;
case 12:
description = "Vale Presente";
break;
case 13:
description = "Vale Combustivel";
break;
case 14:
description = "Duplicata Mercantil";
break;
case 90:
description = "Sem Pagamento";
break;
default:
description = "Dinheiro";
break;
}
array.Add($" {description.PadRight(18)}{mp.vMP.ToString("f2").PadLeft(12)}", LF);
}
String accessKey = cfe.infCFe.Id.Substring(3, 44);
array.Add($" Troco{cfe.infCFe.pgto.vTroco.ToString("f2").PadLeft(25)}", LF);
foreach (var obs in cfe.infCFe.infAdic.obsFisco)
array.Add($" {obs.xCampo}-{obs.xTexto}", LF);
array.Add(line, "OBSERVACOES DO CONTRIBUINTE", LF);
foreach (var item in cfe.infCFe.infAdic.infCpl.Split(';'))
array.Add(item, LF);
array.Add(LF, line, SelectCharSizeHeight(CharSizeHeight.Double), SelectJustification(Justification.Center), $"SAT No. {cfe.infCFe.ide.nserieSAT}",
LF, SelectCharSizeHeight(CharSizeHeight.Normal), DateTime.ParseExact($"{cfe.infCFe.ide.dEmi} {cfe.infCFe.ide.hEmi}", "yyyyMMdd HHmmss", System.Globalization.CultureInfo.InvariantCulture).ToString("dd/MM/yyyy HH:mm:ss"),
LF, LF, SelectCharSizeHeight(CharSizeHeight.Double), accessKey,
LF, LF, PrintBarCode(BarCodeType.CODE128, accessKey.Substring(0, 22), 30), PrintBarCode(BarCodeType.CODE128, accessKey.Substring(22), 30),
LF, LF,
PrintQRCode($"{accessKey}|{cfe.infCFe.ide.dEmi}{cfe.infCFe.ide.hEmi}|{cfe.infCFe.total.vCFe}|{cfe.infCFe.dest?.Item ?? ""}|{cfe.infCFe.ide.assinaturaQRCODE}"),
SelectCharSizeHeight(CharSizeHeight.Normal),
LF, line, LF, LF, LF);
array.Print(@"\\127.0.0.1\printer");Considerations
This library will only accept UTF8 Encoding for Barcodes and QRCodes data.
When printing CODE128 barcodes, it will use automatically subset B, which supports numbers, upper and lower case letters and some additional characters.
You can see the changelog here.
