Hello Tom,
Based on my experience, the problem you met is likely caused by the data
bound to the GridView. I suggest you try saving the exported file as xls or
csv on the client machine and then use notepad or any other text editor to
open it. You can check whether all the data rows and columns(from
server-side datasource) have been persisted in it. If those rows and
columns are missing, it should be caued by some problem with the
server-side gridview databinding and the code logic of flushing the data to
response stream. If the data rows/columns are all persisted in the file,
that means the server-side page/handler has successfully render out the
data, but the cilent-side excel fails to display all the columns when
parsing the file/response stream. How do you think?
BTW, would you provide some detailed code logic on how did you render out
the GridView data as csv format or directly render out the GridView?
Please feel free to let me know if there is anything I missed.
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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