GraphStorageManagement.GenerateGraph.listView1_SelectedIndexChanged C# (CSharp) Method

        private void listView1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (listView1.SelectedItems.Count > 0)
            {
                ListViewItem item = listView1.SelectedItems[0];
                String field = item.Text;
                
                preview_articles.change_prev(field);
                loadEdgeFields(listView2, field);
                String first = preview_articles.getFirst();
        
                ListViewItem[] list = preview_articles.show_preview(first);
                list[0].Selected = true;
                listView3.Items.Clear();
                listView3.Items.AddRange(list);

                listView3.EndUpdate();
                listView8.Items.Clear();
                listView8.Items.AddRange(preview_vertex.show_preview(field));
                listView8.EndUpdate();

                dbm.setting.vertexCol = field;
                dbm.setting.edgeCol = null;
            }
        }