Pobierz obrazy z bazy danych serwera sql

to jest przykład z SQL Server

        connection.Open();
        SqlCommand command1 = new SqlCommand("select imgfile from myimages where [email protected]", connection);
        SqlParameter myparam = command1.Parameters.Add("@param", SqlDbType.NVarChar, 30);
        myparam.Value = txtimgname.Text;
        byte[] img = (byte[])command1.ExecuteScalar();
        MemoryStream str = new MemoryStream();
        str.Write(img, 0, img.Length);
        Bitmap bit = new Bitmap(str);
        connection.Close();

spójrz tutajhttp://www.akadia.com/services/dotnet_read_write_blob.html