void GetPic(byte[] imData,int size)
{
Response.ContentType = "image/jpeg";
Response.OutputStream.Write(imData, 0, size);
}


void Page_Load(object sender, EventArgs e) {

int id = Int32.Parse(Request.QueryString["id"]);
string preview = Request.QueryString["preview"];
string conn_str = "PROVIDER=MICROSOFT.JET.OLEDB.4.0;DATA SOURCE="+Server.MapPath("imagedb.mdb");
OleDbConnection conn = new OleDbConnection(conn_str);
OleDbCommand cmd = new OleDbCommand("SELECT pic FROM pics WHERE id="+id+";", conn);
try
{
conn.Open();
OleDbDataReader rdr = cmd.ExecuteReader();
rdr.Read();
int size = (int) rdr.GetBytes(0,0,null,0,0);
byte[] imData = new byte[size];
rdr.GetBytes(0,0,imData,0,size);
if(preview=="true")GetThumb(imData);else GetPic(imData,size);
Response.End();
rdr.Close();
}
catch (Exception err)
{
Response.Write(err.Message);
}
finally
{

if (conn!=null)conn.Close();
}

}