how to getting menu item value

public static void dropdownbind1(string tbl, string field, DropDownList ddl, string datatext, string datatvale)
   {
       ddl.Items.Clear();
       str = "select distinct " + field + " from " + tbl + ""
       cmd = new MySqlCommand(str, Classmysql.con);
       dtp = new MySqlDataAdapter(cmd);
       ds = new DataSet();
       dtp.Fill(ds);
       if (ds.Tables[0].Rows.Count > 0)
       {
           ddl.DataSource = ds;
           ddl.DataTextField = datatext;
           ddl.DataValueField = datatvale;
           ddl.DataBind();
           ddl.Items.Insert(0, "SELECT");
       }
       else
       {
           ddl.Items.Insert(0, "no details");

       }
here is the example.it is general method.

   }