public MainWindow()
{
InitializeComponent();
combo_stock_index.SelectedIndex = 0;
DbSql.DBConnect();
company_infos = DbSql.LoadCompanyList();
foreach (object obj in company_infos)
{
PageEquityList.EquityInfo ci = (PageEquityList.EquityInfo)obj;
combo_stock_index.Items.Add(ci.index);
}
}