我尝试在 Zebra 打印机上打印，但它打印出一张空白纸

Question

目前，我有这个代码，但是打印时打印空白，并且预览也显示空白页，有谁知道问题是什么？

try
{
    string brand = txtbxBrand.Text;
    string description = txtbxDescrip.Text;
    string sku = txtbsSku.Text;

    while (sku.Length < 12)
    {
        sku = "0" + sku;
    }

    var sb = new StringBuilder();

    PrintDialog pd = new PrintDialog();
    pd.PrinterSettings = new System.Drawing.Printing.PrinterSettings();
    sb.AppendLine();
    sb.AppendLine("N"); //Clear image buffer
    sb.AppendLine("q425"); //set form width
    sb.AppendLine("Q300,26"); //Set form length
    //AStartpoint,VerticalStartPoint,Rotation,Font Selection, Horizontal Multiplier(expands Text Horozontally),Vertical Multiplier(Expands Text Vertically), Reverse, Image, data)
    sb.AppendLine(string.Format(CultureInfo.InvariantCulture, "A26,96,0,4,1,1,N,\"{0}\"", brand));
    sb.AppendLine(string.Format(CultureInfo.InvariantCulture, "A26,130,0,4,1,1,N,\"{0}\"", description));
    //BStartPoint,VerticalStartPoint,Rotation,Bar Selection(Code 128mode A),Barcode Width,Wide Barcode Width,Barcode Height, Print Human Readable (b=yes),Data)
    sb.AppendLine(string.Format(CultureInfo.InvariantCulture, "B50,13,0,1A,2,3,50,B,\"{0}\"", sku));
    sb.AppendLine("P1,1"); //Print Command Qty

    if (DialogResult.OK == pd.ShowDialog(this))
    {
        RawPrinterHelper.SendStringToPrinter(pd.PrinterSettings.PrinterName, sb.ToString());
    }
}
catch (Exception ex)
{
    MessageBox.Show("Print Error:" + ex.Message);
}