With “.xlsx” in the search box, several search results displayed, unfortunately, there is no title appeared. but there is no such problems on the other extensions, like xls, doc, ppt, docx, pptx etc
highly appreciated with any suggestions!
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Microsoft provides an Open XML SDK which is used to generate the XLSX format (it can’t generate the older office formats). It is for .NET and doesn’t have the overhead of COM. It’s very fast, but the API is, well, complicated. The documentation that comes with it isn’t too shabby.
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As follow up, Microsoft publish a KB which could fix this issue
https://support.microsoft.com/en-us/kb/3054926
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