用6个dll打印PDf文件

public string PrintWirhSixDll(string filePath, int copies) { try { //filePath = "E:\\bb.pdf"; O2S.Components.PDFRender4NET.PDFFile file = O2S.Components.PDFRender4NET.PDFFile.Open(filePath); PrinterSettings settings = new PrinterSettings(); System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument(); //// 获取本机默认打印机名称 //string defaultPrinter = pd.PrinterSettings.PrinterName; settings.PrintFileName = filePath.Substring(filePath.LastIndexOf("\\") + 1); settings.Copies = (short)copies; settings.Duplex = Duplex.Simplex; settings.PrinterName = "打印机名字"; //settings.PrinterName = defaultPrinter;//服务器上不能默认打印机，必须指定名称 settings.PrintToFile = false; ////设置纸张大小（可以不设置取，取默认设置）3.90 in, 8.65 in //PaperSize ps = new PaperSize("Your Paper Name", 210, 249); //ps.RawKind = 150; //如果是自定义纸张，就要大于118，（A4值为9，详细纸张类型与值的对照请看http://msdn.microsoft.com/zh-tw/library/system.drawing.printing.papersize.rawkind(v=vs.85).aspx） O2S.Components.PDFRender4NET.Printing.PDFPrintSettings pdfPrintSettings = new O2S.Components.PDFRender4NET.Printing.PDFPrintSettings(settings); //pdfPrintSettings.PaperSize = ps; pdfPrintSettings.PageScaling = O2S.Components.PDFRender4NET.Printing.PageScaling.FitToPrinterMarginsProportional; //pdfPrintSettings.PrinterSettings.Copies = (short)copies; //pdfPrintSettings.PrinterSettings.Duplex = Duplex.Simplex; file.Print(pdfPrintSettings); file.Dispose(); } catch (Exception ex) { return ex.ToString(); } return "OK"; }