/// <summary>

        /// excel转换为pdf

        /// </summary>

        /// <param name="file_inputname"></param>

        public void PrintSheetToPDF(string fileInputName)

        {

            try

            {

                GetPrinterName(ref PrinterName, ref obj_printer_settings, ref oType);



                PrintDocument prtdoc = new PrintDocument();



                currentPrinterName = prtdoc.PrinterSettings.PrinterName;   //获取默认的打印机名 



                //更改默认打印机

                SetDefaultPrinter(PrinterName.Trim());

                //通知更改

                SendNotifyMessage(HWND_BROADCAST, WM_WININICHANGE, 0, "windows");



                if (fileInputName == "")

                {

                    return;

                }



                filePath = fileSavePath + "\\" + GetFileName(fileInputName) + ".pdf";



                oType.InvokeMember("Init", System.Reflection.BindingFlags.InvokeMethod, null, obj_printer_settings, null);



                oType.InvokeMember("SetValue", System.Reflection.BindingFlags.InvokeMethod, null, obj_printer_settings, new object[] { "output", filePath });



                oType.InvokeMember("SetValue", System.Reflection.BindingFlags.InvokeMethod, null, obj_printer_settings, new object[] { "showsettings", "never" });



                oType.InvokeMember("SetValue", System.Reflection.BindingFlags.InvokeMethod, null, obj_printer_settings, new object[] { "ShowPDF", "no"&