ListBox SelectedItem

[wyzbs]

I got a problem with ListBox.Selecte dItem

When I bound a listbox to a database, and try to convert listbox.selecte ditem to string, it returns me "System.Data.Da taRowView".

And later I try to use listbox.text, it works.

Does anyone know what's wrong?

private DataSet ListDataBinding()
        {
            SqlConnection cn = new SqlConnection();

            SqlDataAdapter da_returnDS;
            DataSet returnDS_ds = new DataSet();

            string SQLStr = "";

            cn.ConnectionString = MMMP.MainDialogForm.connection_string;
            cn.Open();


            SQLStr = "Select distinct Date_Accept from Work_Order_History order by Date_Accept";

            da_returnDS = new SqlDataAdapter(SQLStr, cn);
                            
            da_returnDS.Fill(returnDS_ds, "DistinctMember");
            cn.Close();
            return returnDS_ds;
        }

        private void Sch_History_Frm_Load(object sender, EventArgs e)
        {
            
            DataSet dS_Date = ListDataBinding();
            lstb_Date.DataSource = dS_Date;
            lstb_Date.DisplayMember = "DistinctMember.Date_Accept";

        }

        private void lstb_Date_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (lstb_Date.SelectedIndex != -1)
            {
                
                

             string hist_Date = Convert.ToString(lstb_Date.SelectedValue);


            }
        }

Thank you