private void tV_GroupItem_AfterSelect(object sender, TreeViewEventArgs e) { TreeNode selectNode = this.tV_GroupItem.SelectedNode; DataTable profileCus = new DataTable(); if (selectNode.Tag == "1") { dGV_Items.DataSource = _items.GetTableItemsFullMySQL(); } else { if (selectNode.Tag == "2") { dGV_Items.DataSource = _items.GetListItemFull_ForGroup(selectNode.Text); } } }