CGW-Printing/Test/TrayTest.cs

using System;
using System.Drawing;
using System.Drawing.Printing;

class TrayTest
{
    static void Main()
    {
        var printerName = "Brother HL-L6415DW series Printer";
        var trayNumbers = new int[] { 1, 2, 256, 257, 270 }; // Tray 1, 2, 3, 4, 5
        var currentPage = 0;

        var printDoc = new PrintDocument
        {
            PrinterSettings = { 
                PrinterName = printerName,
                Duplex = Duplex.Simplex  // Force single-sided
            }
        };

        // QueryPageSettings fires BEFORE PrintPage - this is where we set the tray
        printDoc.QueryPageSettings += (sender, e) =>
        {
            if (e.PageSettings == null)
                return;

            var trayNumber = trayNumbers[currentPage];

            // Set the tray for this page
            PaperSource? paperSource = null;
            foreach (PaperSource source in printDoc.PrinterSettings.PaperSources)
            {
                if (source.RawKind == trayNumber)
                {
                    paperSource = source;
                    break;
                }
            }

            if (paperSource != null)
            {
                e.PageSettings.PaperSource = paperSource;
                Console.WriteLine($"Page {currentPage + 1}: Using tray {trayNumber} ({paperSource.SourceName})");
            }
            else
            {
                Console.WriteLine($"Page {currentPage + 1}: WARNING - Tray {trayNumber} not found!");
            }
        };

        printDoc.PrintPage += (sender, e) =>
        {
            if (e.Graphics == null)
                return;

            // Draw the page number
            var font = new Font("Courier New", 24, FontStyle.Bold);
            var text = $"Page #{currentPage + 1}";
            e.Graphics.DrawString(text, font, Brushes.Black, 100, 100);

            currentPage++;
            e.HasMorePages = currentPage < trayNumbers.Length;
        };

        Console.WriteLine($"Printing 5 pages to {printerName}...");
        printDoc.Print();
        Console.WriteLine("Done!");
    }
}