How To Download Excel File From Site

Jan 17, 2011

I am trying to automate the creation of an excel workbook from data retrieved from a SQL server. I have successfully automated the process and the file successfully saves in a pre-determined location as a 57kb xlsx file. However, when I run the Response.TransferFile code, a file is downloaded that is 18kb in size, and when you try to open the file, it says that the file has an invalid extension. Here is the relevent code:


I have tried multiple content types and different ways of specifying the content type (Response.ContentType = XXX, Response.ContentType = "application/excel","",etc). Nothing works. I can't figure out why the filesize is different even if the extension is wrong.

I can navigate to H:/test/filename and open it just fine, so the excel portion of the code is working fine. I don't understand because this code is so simple yet goes so horribly wrong.

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