Question

I’m creating a spreadsheet with the OpenXML SDK. The spreadsheet has several worksheets, styles, etc.

• When I open the file in Excel, it renders fine, with no errors, and displaying all cell formats and data correctly.
• When I open the file on a mobile device, depending on the app, I get errors that indicate the file is corrupt, or missing altogether.

I opened the .xlsx file in Excel and saved it off to another file; then I did a diff on the directory structures inside the corresponding zip files. I noticed:

• The new copy (the copy that went through Excel) now renders properly on all tested mobile apps.
• Only the new copy includes:
• • /docProps
• • /xl/theme
• • docProps/app.xml
• • docProps.core.xml
• • docProps/theme1.xml
• Only the old copy includes:
• • /xl/worksheets/_rels/
• • sheet#.xml.rels
• Modified files:
• • sheet#.xml
• • sharedStrings.xml
• • styles.xml
• • workbook.xml
• • [Content_Types].xml

What do I need to do to this file prior to saving to resolve these conflicts?

Answer 1

The problem seems to be the relationship URIs. See this question for a similar problem:

OpenXML spreadsheet created in .NET won't open in iPad

The biggest issue is that the worksheet XML files have to be “sheet1.xml” instead of “/xl/sheet1.xml”, as with other relevant XML files.