RawPrinterHelper无法使用ESC POS命令打印条形码 [英] RawPrinterHelper unable to print Barcode using ESC POS Commands

问题描述

一个相对简单的任务变成了数小时的挫败感，所以去了:

A relatively simple task is turning into hours of frustration so here goes:

我有各种热敏打印机，我们使用Microsoft发布的RawPrinterHelper进行打印. 通常使用字符串"构建器构建字符串并调用SendStringToPrinter，我们会得到一张打印纸.

I have various Thermal printers and we print to the using the RawPrinterHelper that Microsoft posted. Usually use a String builder build the string and call the SendStringToPrinter and we have a printed piece of paper.

我正在尝试通过支持的ESC/POS命令打印简单的条形码.我们将这些功能用于其他所有功能都可以使用的功能(剪切，更改字体大小)，但条形码无法打印.

I'm trying to print a simple barcode via the ESC/POS commands that are supported. WE use these for other functions (cutting, change font sizes) that all works, the barcode refuses to print.

ESC POS命令为:GS k m n d1 d2…dn m:条形码类型 n:条形码长度-表示条形码数据字节数 d1条码

ESC POS Command is : GS k m n d1 d2 … dn m：barcode type e.g. n：barcode length -indicates the number of bar code data bytes d1 the barcode

我的问题是，如何发送条形码的长度? 我相信这是我的问题所在.

The question I have is, How do I send the length of the barcode? I believe this where my problem lies.

代码段:

StringBuilder print = new StringBuilder();
barcode = "1234567890";
char commandGS = '\x1D';
char linefeed = '\x0A';
char esc = '\x1B';
char commandFontSize = '\x21';
char commandk = '\x6B';
char code128 = '\x69';
print.Append(commandGS);
print.Append(commandk);
print.Append(code128);
print.Append(barcode.Length);
print.Append(barcode);
string printJob = print.ToString();
RawPrinterHelper.SendStringToPrinter(printerName, printJob);

推荐答案

您可能需要一个字节来表示条形码的长度，而不是文本来表示条形码的长度.

You probably need a byte to represent the length of the barcode rather than the text representation of the length of the barcode.

所以不是

print.Append(barcode.Length);

使用

print.Append((char)barcode.Length);

我认为长度不超过255.

I assume the length does not exceed 255.

编辑后添加:您可以使用类似的东西检查发送的字节

Edited to add: You can examine the bytes which you are sending with something like

var bb = Encoding.UTF8.GetBytes(printJob);
bb.ToList().ForEach(x => Console.Write(x.ToString("X2") + " "));

，并检查它们是否符合您要发送的内容.您可能还想比较在当前代码中发送给起作用的东西的消息.

and check that they conform to what you intend to send. You may also want to compare what is sent to something which does work in your current code.

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