如何在c#中使用PrintDocument在热敏打印机中发送剪切命令

using System.Drawing.Printing;

PrintDocument printDocument = new PrintDocument();
printDocument.PrinterSettings.PrinterName = "热敏打印机名称";

printDocument.PrintPage += new PrintPageEventHandler(PrintPageHandler);

private void PrintPageHandler(object sender, PrintPageEventArgs e)
{
    // 设置打印内容
    string content = "这是要打印的内容";
    Font font = new Font("Arial", 12);
    e.Graphics.DrawString(content, font, Brushes.Black, 0, 0);

    // 发送剪切命令
    string cutCommand = "\x1B\x69";
    RawPrinterHelper.SendStringToPrinter(printDocument.PrinterSettings.PrinterName, cutCommand);
}

public class RawPrinterHelper
{
    [DllImport("winspool.drv")]
    public static extern bool OpenPrinter(string pPrinterName, out IntPtr phPrinter, IntPtr pDefault);

    [DllImport("winspool.drv")]
    public static extern bool ClosePrinter(IntPtr hPrinter);

    [DllImport("winspool.drv", CharSet = CharSet.Unicode, ExactSpelling = false)]
    public static extern bool SendStringToPrinter(IntPtr hPrinter, string data, int count, out int bytesWritten);

    public static bool SendStringToPrinter(string printerName, string data)
    {
        IntPtr printerHandle;
        int bytesWritten;

        if (!OpenPrinter(printerName, out printerHandle, IntPtr.Zero))
        {
            return false;
        }

        if (!SendStringToPrinter(printerHandle, data, data.Length, out bytesWritten))
        {
            return false;
        }

        ClosePrinter(printerHandle);
        return true;
    }
}

printDocument.Print();