如何检查Excel文件是2007还是2010 Office

Question

i am using following code to differentiate excel file of 2003 and 2007 office.

if (Extension == ".xls" || Extension == ".xlsx")
 {
 }

but now i also need to identify 2010 excel file. please suggest some solution.

Answer 1

You're probably aware that .xlsx files (like all Office Open XML files) are actually .zip files that contain a set of inner files that describe the content. So here's where you go to find the version number of the program that saved the file:

Rename the .xlsx extension to .zip (when you're doing this programatically, you can skip that step, but it's helpful for demonstration). Open up the zipped structure contained in the file.

You'll find a docProps directory inside, which contains a file called app.xml (open it). You'll find something that looks like this:

<Properties>
  <Application>Microsoft Excel</Application>
  <DocSecurity>0</DocSecurity>
  <ScaleCrop>false</ScaleCrop>
  <HeadingPairs>
    <vt:vector size="2" baseType="variant">
      <vt:variant>
        <vt:lpstr>Worksheets</vt:lpstr>
      </vt:variant>
      <vt:variant>
        <vt:i4>3</vt:i4>
      </vt:variant>
    </vt:vector>
  </HeadingPairs>
  <TitlesOfParts>
    <vt:vector size="3" baseType="lpstr">
      <vt:lpstr>Sheet1</vt:lpstr>
      <vt:lpstr>Sheet2</vt:lpstr>
      <vt:lpstr>Sheet3</vt:lpstr>
    </vt:vector>
  </TitlesOfParts>
  <LinksUpToDate>false</LinksUpToDate>
  <SharedDoc>false</SharedDoc>
  <HyperlinksChanged>false</HyperlinksChanged>
  <AppVersion>14.0300</AppVersion>
</Properties>

See the <Application> tag? That tells you that it was saved in Excel (as opposed to, say Open Office). See the <AppVersion> tag? That one has the version number you're looking for. Excel 2007 is version 12, and Excel 2010 is 14 (because using version number 13 would have jinxed the whole operation). Excel 2013 is expected to be version 15.