xlBook.SaveAs(FilePath,Microsoft.Office.Interop.Excel.XlFileFormat.xlExcel8, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
发现Office.Interop.Excel.XlFileFormat.xlExcel8格式与本机安装的office对不上，用Office.Interop.Excel.XlFileFormat.xlWorkbookNormal则可以
xlBook.SaveAs(FilePath, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing)
解决C#导出excel异常来自 HRESULT:0x800A03EC的方法 .
原文：http://www.cnblogs.com/gisoracle/p/5744782.html