Diagraph-LTUAPI 1.0.3

# Guide to Using the LTU API

In this example, we will demonstrate how to use the LTU API to communicate with an LTU printer and retrieve label information.

## Step 1: Prepare Your Project

Ensure that you have installed the LTU API package in your project. You can download it from NuGet.

```bash
Install-Package Allen.LTUAPI

Step 2: Sample Code

Here is a C# sample code that utilizes the LTU API to communicate with the printer and fetch label information:

using System;
using Diagraph.Labelparser.XLU.PrintableElements;
using Diagraph.Printer.XL;

namespace LTU_Demo
{
    internal class Program
    {
        //public static string connection = "rs232://COM1:115200,8,N,1";
        public static string connection = "tcpip://";

        private static void Main(string[] args)
        {
            try
            {
                var printerApi = new XLPrinterAPI();

                var foundPrinters = printerApi.FindPrinters();
                foreach (var ip in foundPrinters)
                {
                    Console.WriteLine("found XL printer at: " + ip);
                    Console.WriteLine();

                    printerApi.OpenDevice(connection + ip + ":" + XLPrinterAPI.DefaultPort);
                    var labelNames = printerApi.LabelNames();

                    foreach (var labelName in labelNames)
                    {
                        Console.WriteLine(new string('-', 80));
                        Console.WriteLine("Labelname: " + labelName);
                        printerApi.Stop();

                        var labelBytes = printerApi.LabelBytes(labelName);
                        Console.WriteLine("Label raw bytes: " + labelBytes.Length);

                        var parsedLabel = printerApi.Label(labelBytes);

                        foreach (var element in parsedLabel.GetPrintableElements())
                            switch (element)
                            {
                                case PrintableBarcode barcode:
                                    Console.WriteLine("BarcodeType: " + barcode.BarcodeType);
                                    break;
                                case PrintableGraphic graphic:
                                    Console.WriteLine("Graphic bytes: " + graphic.ContentInByteOfThePicture.Length);
                                    break;
                                case PrintableLineFrame line:
                                    Console.WriteLine("Line thickness: " + line.Thickness);
                                    break;
                                case PrintableText text:
                                    Console.WriteLine("Textfield: " + text.MessageContent);
                                    break;
                            }
                    }

                    printerApi.Stop();
                    printerApi.CloseDevice();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }

            Console.WriteLine();
            Console.WriteLine("Press any key");
            Console.ReadLine();
        }
    }
}

This code demonstrates how to open a connection to the printer, retrieve label formats, fetch label data, and extract various elements from the label, such as barcodes, graphics, lines, and text.