PrintDocument print = new PrintDocument();
            string sDefault = print.PrinterSettings.PrinterName;//默认打印机名
            string s = "";
            foreach (string sPrint in PrinterSettings.InstalledPrinters)//获取所有打印机名称
            {
                s = sPrint;
            }
            return;
            OpenFileDialog fileDialog = new OpenFileDialog();
            //fileDialog.Title = "请选择文件";
            //fileDialog.Filter = "excel03文件(*.xls)|*.xls";
            //fileDialog.FilterIndex = 1;
            //fileDialog.RestoreDirectory = true;

if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                #region excel
                //Microsoft.Office.Interop.Excel.ApplicationClass xlsApp = new Microsoft.Office.Interop.Excel.ApplicationClass();
                //xlsApp.Visible = true;
                //object oMissing = System.Reflection.Missing.Value;
                //Microsoft.Office.Interop.Excel.Workbook xlsWorkbook = xlsApp.Workbooks.Open(fileDialog.FileName, 0, true, 5, oMissing, oMissing, true, 1, oMissing, false, false, oMissing, false, oMissing, oMissing);
                //Microsoft.Office.Interop.Excel.Worksheet xlsWorksheet = (Microsoft.Office.Interop.Excel.Worksheet)xlsWorkbook.Worksheets[1];
                xlsWorksheet.PrintPreview(null);
                //xlsWorksheet.PrintOut(1, 2, 1, false, oMissing, true, false, oMissing);
                //xlsApp.Visible = false;
                //xlsWorksheet = null;
                #endregion
                #region word
                object wordFile = fileDialog.FileName;
                object oMissing = Missing.Value;
                object copies = "1";
                object oTrue = true;
                object oFalse = false;
                object doNotSaveChanges = Microsoft.Office.Interop.Word.WdSaveOptions.wdDoNotSaveChanges;
                Microsoft.Office.Interop.Word.Application appWord = new Microsoft.Office.Interop.Word.Application();
                appWord.Visible = false;
                appWord.DisplayAlerts = Microsoft.Office.Interop.Word.WdAlertLevel.wdAlertsNone;
                string defaultPrinter = appWord.ActivePrinter;
                Microsoft.Office.Interop.Word.Document doc = appWord.Documents.Open(
                    ref wordFile ,
                    ref oMissing,
                    ref oTrue ,
                    ref oFalse ,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing);
                //弹出打印设置
                //appWord.Dialogs[Microsoft.Office.Interop.Word.WdWordDialog.wdDialogFilePrint].Show(ref oMissing);
                //appWord.Visible = false;
                appWord.ActivePrinter = "hp3030 ";
                doc.PrintOut(
                    ref oTrue,
                    ref oFalse,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref copies,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing,
                    ref oMissing);
                appWord.ActivePrinter = defaultPrinter;
                doc.Close(ref doNotSaveChanges, ref oMissing, ref oMissing);
                appWord.Quit(ref oMissing, ref oMissing, ref oMissing);
                doc = null;
                appWord = null;
                GC.Collect();
                #endregion word

}