基于C#实现一维码和二维码打印功能

// 通用打印机接口
public interface IBarcodePrinter {
    void Connect(string printerName);
    void SendPrintJob(byte[] imageData);
    void SetPrintSettings(PrintSettings settings);
}

// 斑马打印机专用实现
public class ZebraPrinter : IBarcodePrinter {
    private SMT.ZEBRA.ZebraPrinter printer;
    
    public void Connect(string printerName) {
        printer = new SMT.ZEBRA.ZebraPrinter(printerName);
        printer.Open();
    }
    
    public void SendPrintJob(byte[] imageData) {
        printer.SendData(imageData, 0, imageData.Length);
    }
}

// ZXing生成一维条码示例
public Bitmap GenerateCode128(string data) {
    var writer = new BarcodeWriter {
        Format = BarcodeFormat.CODE_128,
        Options = new EncodingOptions {
            Width = 300,
            Height = 100,
            Margin = 1
        }
    };
    return writer.Write(data);
}

// QRCoder生成二维码示例
public Bitmap GenerateQRCode(string data) {
    var qrGenerator = new QRCodeGenerator();
    var qrCodeData = qrGenerator.CreateQrCode(data, QRCodeGenerator.ECCLevel.Q);
    return qrCodeData.ToBitmap();
}

public class PrintService {
    private IBarcodePrinter printer;
    
    public PrintService(IBarcodePrinter printer) {
        this.printer = printer;
    }
    
    public void PrintLabel(string data, BarcodeType type) {
        Bitmap barcode = type switch {
            BarcodeType.Code128 => GenerateCode128(data),
            BarcodeType.QRCode => GenerateQRCode(data),
            _ => throw new NotSupportedException()
        };
        
        printer.SendPrintJob(barcode.ToByteArray());
    }
}

// 提升条码对比度
public Bitmap EnhanceContrast(Bitmap image) {
    using var graphics = Graphics.FromImage(image);
    var attributes = new ImageAttributes();
    attributes.SetColorMatrix(new ColorMatrix {
        Matrix00 = 1.2f,
        Matrix11 = 1.2f
    });
    graphics.DrawImage(image, 
        new Rectangle(0,0,image.Width,image.Height),
        0,0,image.Width,image.Height,
        GraphicsUnit.Pixel, attributes);
    return image;
}

public class PrintQueue {
    private ConcurrentQueue<PrintJob> queue = new();
    
    public void Enqueue(PrintJob job) {
        queue.Enqueue(job);
        ProcessNextJob();
    }
    
    private async void ProcessNextJob() {
        if(queue.TryDequeue(out var job)) {
            await Task.Run(() => job.Print());
        }
    }
}

public void BatchPrint(List<PrintJob> jobs) {
    Parallel.ForEach(jobs, job => {
        job.GenerateBarcode();
        printer.SendPrintJob(job.BarcodeData);
    });
}

public class DatabasePrintService {
    private readonly IDatabaseService dbService;
    
    public void PrintFromDatabase() {
        var records = dbService.GetPendingLabels();
        foreach(var record in records) {
            var data = $"{record.ProductID}-{record.BatchNo}";
            PrintService.PrintLabel(data, record.BarcodeType);
        }
    }
}

sequenceDiagram
    participant App
    participant Printer
    participant Scanner
    
    App->>Printer: 发送条码图像
    Printer->>Printer: 渲染打印
    Printer->>Scanner: 输出标签
    Scanner->>App: 返回扫描结果
    App->>App: 验证数据一致性

// 打印权限控制
[Authorize(Roles = "Operator,Admin")]
public class PrintController : ControllerBase {
    // 打印接口实现
}