problem in reading images from sql server

[gneti]

I am trying to retrieve images from SQL server and display them on the client’s browser. Images in the SQL server are imported from MS Access 2002

I found the following code that mentions about removing the OLE Header for Northwind Database. I tried using the same logic to retrieve images from the database that I imported and got an error “Invalid parameter” when trying to run the program



private void DisplayImages ()
{

string connectionString = "workstation id=\"GA33611-PDD\";user id=sa;password=dufas;data source=\"GA33611-PDD" +
"\";initial catalog=northwind";

SqlConnection cn = new SqlConnection(connectionString);

SqlCommand cmd = new SqlCommand(cmdText, cn);

MemoryStream ms = new MemoryStream();

// 78 is the size of the OLE header for Northwind images.
// There's no header in PUBS as PUBS
// just contains the raw image bits.
int offset = 78;

cn.Open();
byte [] img = (byte[]) cmd.ExecuteScalar();
ms.Write(img, offset, img.Length-offset);
cn.Close();

Bitmap bmp = null;
bmp = new Bitmap(ms);
Response.ContentType = "image/gif";
bmp.Save(Response.OutputStream, ImageFormat.Gif);
ms.Close();


}


As I think may be I need to remove that OLE header in my database. Are there any ways to find out the size of this header.

Any help in this regard is greatly appreciated.