Bind cascading dropdownlist to show the state and city which is stored in table

Hi

Into my application there is EditAds.aspx page where the user get a link on his email after he add an Ad into my application. My inquiry is can i bind the cascading ddl to show the value of State column into Ad/product row as well if the user want to update the rest of state will be also reachable. It maybe hard to get what i am looking for excatly so i make a short screen record where it can explain more clearly what i am looking for  please have a loot to it.

Please note: rebinding values of Ad/product depending on AdsID which is  a query string in the page called: QADNUM

https://www.youtube.com/watch?v=YcJJObe1w50&feature=youtu.be 

if (!IsPostBack)
            {
                if (cookie["Location"] == null)
                {

                    DataTable rEfilterstathpBizDT = new DataTable();

                    using (SqlConnection REGGfilterstathpBizCon = new SqlConnection(sc))
                    {

                        SqlCommand ReggfilterstathpBizCMD = new SqlCommand("SELECT State FROM State WHERE Country = @Location", REGGfilterstathpBizCon);

                        var Location = cookie.Value;

                        ReggfilterstathpBizCMD.Parameters.AddWithValue("@Location", Location);


                        SqlDataAdapter ReghfilterstathpBizAP = new SqlDataAdapter();
                        ReghfilterstathpBizAP.SelectCommand = ReggfilterstathpBizCMD;
                        ReghfilterstathpBizAP.Fill(rEfilterstathpBizDT);

                        Regstatedrdolst.DataSource = rEfilterstathpBizDT;
                        Regstatedrdolst.DataTextField = "State";

                        Regstatedrdolst.DataBind();
                    }

                    Regstatedrdolst.Items.Insert(0, new ListItem("Select Province", ""));
                }

            }

protected void Regstatedrdolst_SelectedIndexChanged(object sender, EventArgs e)
        {

            DataTable RegCityDT = new DataTable();
            using (SqlConnection con2 = new SqlConnection(ConfigurationManager.ConnectionStrings["BeravaConnectionString"].ConnectionString))
            {

                SqlCommand RegCityCom = new SqlCommand("SELECT City FROM Cities WHERE State=@State", con2);

                RegCityCom.Parameters.AddWithValue("@State", Regstatedrdolst.SelectedItem.Text);

                SqlDataAdapter RegCityADAP = new SqlDataAdapter();
                RegCityADAP.SelectCommand = RegCityCom;
                RegCityADAP.Fill(RegCityDT);

                Regcitiesdrdolst.DataSource = RegCityDT;
                Regcitiesdrdolst.DataTextField = "City";

                Regcitiesdrdolst.DataBind();
            }

            Regcitiesdrdolst.Items.Insert(0, new ListItem("Select City", ""));
        }