Excel.Application
SaveAs 中的第二个参数的值：
可以直接用 10 进制的值代替左边的这些 xl 类型 .
例如：把excel转换为html的js：
var oWB = oXL.Workbooks.open("d:\test.xls");
oWB.worksheets(i).select();
var oSheet = oWB.ActiveSheet;
oSheet.SaveAs("d:\test.html",44);
fileformat 类型 十进制值 具体文件类型
xlAddIn 18 Microsoft Excel 2007 Add-In
xlAddIn8 18 Microsoft Excel 97-2003 Add-In
xlCSV 6 CSV
xlCSVMac 22 Macintosh CSV
xlCSVMSDOS 24 MSDOS CSV
xlCSVWindows 23 Windows CSV
xlCurrentPlatformText -4158 Current Platform Text
xlDBF2 7 DBF2
xlDBF3 8 DBF3
xlDBF4 11 DBF4
xlDIF 9 DIF
xlExcel12 50 Excel12
xlExcel2 16 Excel2
xlExcel2FarEast 27 Excel2 FarEast
xlExcel3 29 Excel3
xlExcel4 33 Excel4
xlExcel4Workbook 35 Excel4 Workbook
xlExcel5 39 Excel5
xlExcel7 39 Excel7
xlExcel8 56 Excel8
xlExcel9795 43 Excel9795
xlHtml 44 HTML format
xlIntlAddIn 26 International Add-In
xlIntlMacro 25 International Macro
xlOpenXMLAddIn 55 Open XML Add-In
xlOpenXMLTemplate 54 Open XML Template
xlOpenXMLTemplateMacroEnabled 53 Open XML Template Macro Enabled
xlOpenXMLWorkbook 51 Open XML Workbook
xlOpenXMLWorkbookMacroEnabled 52 Open XML Workbook Macro Enabled
xlSYLK 2 SYLK
xlTemplate 17 Template
xlTemplate8 17 Template 8
xlTextMac 19 Macintosh Text
xlTextMSDOS 21 MSDOS Text
xlTextPrinter 36 Printer Text
xlTextWindows 20 Windows Text
xlUnicodeText 42 Unicode Text
xlWebArchive 45 Web Archive
xlWJ2WD1 14 WJ2WD1
xlWJ3 40 WJ3
xlWJ3FJ3 41 WJ3FJ3
xlWK1 5 WK1
xlWK1ALL 31 WK1ALL
xlWK1FMT 30 WK1FMT
xlWK3 15 WK3
xlWK3FM3 32 WK3FM3
xlWK4 38 WK4
xlWKS 4 Worksheet
xlWorkbookDefault 51 Workbook default
xlWorkbookNormal -4143 Workbook normal
xlWorks2FarEast 28 Works2 FarEast
xlWQ1 34 WQ1
xlXMLSpreadsheet 46 XML Spreadsheet