Web Forms :: Retrieve Large File From Database?

Sep 21, 2010

I have a database table that works as a file repository. Currently there are binaries stored in there and I want to pull the "large" ones out in chunks. Some of these files are in excess of 500 MB. I have business rules that dictate if the file is >5MB to transmit in chunks. <5MB and I can load into memory and rip out. I got the uploading in chunks to work, but how do I get it to pull it out of the DB in chunks?

Right now I'm getting hit with a 'System.OutOfMemory' exception. But when I recreate the byte array of the SAME size (empty though) it doesn't break.

Download Chunks (DAL)

public byte[] getBytesByDataID(int chunkSize, string dataID) { string query = "SELECT data.data " +" FROM data " + " WHERE dataID = @dataID"; openConnection(); cmd = new SqlCommand(query, myConnection); cmd.Parameters.AddWithValue("@dataID", dataID);


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