Save file from Database image field

Question

I have uploaded a text file to my database into a Image field. The problem is when I try to retrieve the file (make the user able to download it on a click on a link). When I try to download it, it is simply filled with the content of the webpage (all the html is filled into the text file). I am considering it to be an error with the way I try to download the file. Isn't it possible to stream the content to a file, without first saving it into a temporary file?

The code I am using is shown below. UploadFiles is my class which contains the data, id, name etc.

    public void DownloadUploadedFile(Page sender, UploadFiles uf)
{
    sender.Response.ContentType = uf.FileType; // the binary data
    sender.Response.AddHeader("Content-Disposition", "attachment; filename=" + uf.FileName);
    sender.Response.BinaryWrite(uf.FileData);
}

Answer 1

It sounds like you've got too much of the rest of the page going to the client. You need to clear the response, and close it afterwards; try:

sender.Response.Clear();
sender.Response.ContentType = uf.FileType; // the binary data
sender.Response.AddHeader("Content-Disposition", "attachment; filename="
         + uf.FileName);
sender.Response.BinaryWrite(uf.FileData);
sender.Response.Close();

Alternatively, use a handler (ashx) to do this - since that doesn't include the regular page markup.