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; }