how to show data from database in datagridview?

string p_code = P1.Text;
string p_design = P2.Text;
SqlDataAdapter pgrid = new SqlDataAdapter("Select * From Product Where Item_Code = @p_code OR Design = @p_design", connection_v);
pgrid.SelectCommand.Parameters.AddWithValue("@p_code", @p_code);
pgrid.SelectCommand.Parameters.AddWithValue("@p_design", @p_design);
DataTable pt = new DataTable();
pgrid.Fill(pt);
dgv_p.DataSource = pt;