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I have an “excel library” workbook and want to convert it to a byte[] so I could return the data with the File method exist in asp.net mvc controller.
There are “Save” and “SaveToStream” method, but no convert to byte[].
How can I return the excel file without saving it in server before?
If you have a SaveToStream you could pass in a MemoryStream into that method. Then, once all the bytes are written call ToArray() on the memory stream, which should give you a byte array.