斑马标记打印机无效打印机异常在 mvc 4 Web 应用程序中

当我运行以下代码通过 asp.net mvc Web 应用程序打印到 zebra 标签打印机时，我得到"InvalidPrinterException"。内部消息显示"未安装打印机"。但是，打印机已安装并设置为默认打印机。我还打印了一个空记事本标签，打印机成功地为我打印了它。

请帮忙！

private void PrintZebra()
        {
                            foreach (string c in System.Drawing.Printing.PrinterSettings.InstalledPrinters)
                        {
                                 if (c.Contains("ZPL")){
                                    var pageSetngs = new PageSettings();
                                    pageSetngs.Margins = new Margins(0,0,0,0);
                                    var prtrSetngs = new System.Drawing.Printing.PrinterSettings();
                                    prtrSetngs.PrinterName = c;
                                    var pd = new PrintDocument();
                                    pd.PrinterSettings = prtrSetngs;
                                    pd.DocumentName = "test";
                                    pd.OriginAtMargins = false;
                                    pd.DefaultPageSettings = pageSetngs;
                                    pd.PrintPage += (sender, args) =>
                                    {
                                         System.Drawing.Font printFont = new System.Drawing.Font("3 of 9 Barcode", 17);
                                         System.Drawing.Font printFont2 = new System.Drawing.Font("Times New Roman", 9, FontStyle.Bold);
                                         SolidBrush br = new SolidBrush(System.Drawing.Color.Black);
                                         args.Graphics.DrawString("*AAAAAAFFF*",printFont,br,10,65);
                                         args.Graphics.DrawString("*AAAAAAFFF*",printFont2,br,10,85);
                                    };
                                    pd.Print();
                         }
                  }
        }