datagridview can not open an image

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C#

PostgreSQL

hello if you can help me or advise me something
i have table named droducts;
insert into products values('a1',45,'ds','C:\Documents and Settings\AdministratorDesktop\1454251_5.jpg');

and i want to see my datas in my datagridviewer1
but there is errot it shows evry row except image and there is error.
my code is

************************************
private DataSet ds = new DataSet();

        private DataTable dt = new DataTable();
        private DataSet dss = new DataSet();
        private DataTable dtt = new DataTable();
********************************

                NpgsqlCommand command = connection.CreateCommand();
                NpgsqlDataReader Reader;
                connection.Open();
                string commanda = "SELECT * FROM products";

                NpgsqlDataAdapter da = new NpgsqlDataAdapter(commanda, conn);

                ds.Reset();
                da.Fill(ds);
                dt = ds.Tables[0];
                dataGridView2.DataSource = dt;

please hepl me...