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　　　　  /// <summary>
        /// PDFRender4NET打印PDF
        /// </summary>
        /// <param name="filePath">pdf文件完全路徑</param>
        /// <param name="printName">打印機名稱，不傳使用默認打印機</param>
        /// <param name="width">標簽寬度mm</param>
        /// <param name="height">標簽高度mm</param>
        private static void PDFRender4NETPrint(string filePath, string printName, double width, double height)
        {
            using (PDFFile file = PDFFile.Open(filePath))
            {
                PrinterSettings settings = new PrinterSettings();
                settings.PrintToFile = false;
                if (printName != null)
                {
                    settings.PrinterName = printName;
                }
                double proportion = 0.0393701;//1mm等于0.0393701 in
                width = width * proportion * 100;//乘100，標簽大小單位是百分之一英寸
                height = height * proportion * 100;
                //設置紙張大小（可以不設置，取默認設置）3.90 in,  8.65 in
                PaperSize ps = new PaperSize(printName, Convert.ToInt32(width), Convert.ToInt32(height));
                //如果是自定義紙張，就要大于118，（A4值為9，詳細紙張類型與值的對照請看http://msdn.microsoft.com/zh-tw/library/system.drawing.printing.papersize.rawkind(v=vs.85).aspx）
                ps.RawKind = 120;
                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 = 1;
                file.Print(pdfPrintSettings);
                //file.Dispose();
            }
        }