New Post: EOF In Header exception when reading .xlsm

FYI :

this code works in order to read a file into a XSSFWorkbook:

private IWorkbook InitializeAddingWorkbook(HttpPostedFile postedFile)
 {
    Stream fileStream = postedFile.InputStream;

    byte[] fileContents = new byte[postedFile.ContentLength];
    fileStream.Read(fileContents, 0, postedFile.ContentLength);
    fileStream.Position = 0; // <---- remember to rewind the stream

    return new XSSFWorkbook(fileStream);

}

Just remember that XSSFWorkbook needs a zip library to decode zipped xml, and the stream passed to the unzipper needs to be at 0 position.
When fileStream.Read( ) reads, the stream keeps positioned at end, so when unzipper needs to read it gets "EOF".

Thanks for your help.

Luis.