用XMLTextWriter写一个XML。要那种可以用Excel使用的XML格式
类似下面的格式
<?xml version="1.0"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:o="urn:schemas-microsoft-com:office:office"
xmlns:x="urn:schemas-microsoft-com:office:excel"
xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
xmlns:html="http://www.w3.org/TR/REC-html40">
<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">
 <Author>ed woychowsky</Author>
 <LastAuthor>Edmond Woychowsky</LastAuthor>
 <Created>2007-01-26T16:54:15Z</Created>
 <LastSaved>2007-01-27T05:18:54Z</LastSaved>
 <Company>None</Company>
 <Version>10.3501</Version>
</DocumentProperties>
<OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">
 <DownloadComponents/>
 <LocationOfComponents HRef="file:///D:"/>
</OfficeDocumentSettings>
<ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">
 <WindowHeight>8700</WindowHeight>
 <WindowWidth>11355</WindowWidth>
 <WindowTopX>480</WindowTopX>
 <WindowTopY>120</WindowTopY>
 <ProtectStructure>False</ProtectStructure>
 <ProtectWindows>False</ProtectWindows>
</ExcelWorkbook>
<Styles>
 <Style ss:ID="Default" ss:Name="Normal">
  <Alignment ss:Vertical="Bottom"/>
  <Borders/>
  <Font/>
  <Interior/>
  <NumberFormat/>
  <Protection/>
 </Style>
</Styles>
<Worksheet ss:Name="Sheet1">
 <Table ss:ExpandedColumnCount="2" ss:ExpandedRowCount="2" x:FullColumns="1"
  x:FullRows="1">
  <Row>
   <Cell><Data ss:Type="String">cell a1</Data></Cell>
   <Cell><Data ss:Type="String">cell b2</Data></Cell>
  </Row>
  <Row>
   <Cell><Data ss:Type="String">cell a2</Data></Cell>
   <Cell><Data ss:Type="String">cell b3</Data></Cell>
  </Row>
 </Table>
 <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
  <Print>
   <ValidPrinterInfo/>
   <HorizontalResolution>600</HorizontalResolution>
   <VerticalResolution>0</VerticalResolution>
  </Print>
  <Selected/>
  <Panes>
   <Pane>
    <Number>3</Number>
    <ActiveRow>2</ActiveRow>
   </Pane>
  </Panes>
  <ProtectObjects>False</ProtectObjects>
  <ProtectScenarios>False</ProtectScenarios>
 </WorksheetOptions>
</Worksheet>
<Worksheet ss:Name="Sheet2">
 <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
  <ProtectObjects>False</ProtectObjects>
  <ProtectScenarios>False</ProtectScenarios>
 </WorksheetOptions>
</Worksheet>
<Worksheet ss:Name="Sheet3">
 <WorksheetOptions xmlns="urn:schemas-microsoft-com:office:excel">
  <ProtectObjects>False</ProtectObjects>
  <ProtectScenarios>False</ProtectScenarios>
 </WorksheetOptions>
</Worksheet>
</Workbook>