private void cmdShowAll_Click(object sender, EventArgs e)
        {
            localhost.Service1 myserver = new localhost.Service1();
            BindingSource      bs       = new BindingSource();

            bs.DataSource         = myserver.search();
            gv.DataSource         = bs;
            gv.Columns[0].Visible = false;
            gv.Columns[1].Visible = false;
            gv.Columns[2].Visible = false;

            gv.Columns[6].Visible = false;
        }