dropdownlist 的动态生成

    protected void ConstructProductDll()    {        this.ddlProductID.Items.Clear();        ArrayList ArrListProductID = new ArrayList();        string ProductList = this.lblProductIDList.Text;        string[] produSplit = ProductList.Split(';');        ProductList = string.Empty;        int flag = 1; //        foreach (string produ_pair in produSplit)        {            string[] produ_ele = produ_pair.Split(',');            foreach (string s in ArrListProductID)            {                if (s == produ_ele[0])                {                    flag=0;                }            }            if (flag == 1 && produ_ele[0]!="")            {                ArrListProductID.Add(produ_ele[0]);                this.ddlProductID.Items.Add(produ_ele[2]);            }            else            {                flag = 1;            }        }    }