asp.net 如何只用一个下拉框显示类似数控件那样级别菜单

Question

asp.net 如何只用一个下拉框显示类似数控件那样级别菜单？？帮帮我这个菜鸟！！

Answer 1

用JS，JQUERY吧，去搜下有很多例子的

Answer 2

dropdownlist 递归加载。 public void BindItem(String ids, IList<GoodsTypeInfo> goodTypeList)
        {
            //根据List长度循环
            for (int j = 0; j < goodTypeList.Count; j++)
            {
                GoodsTypeInfo tyInfo = goodTypeList[j];                //用副ID中截取的字段和父ID相比较
                if (tyInfo.FuIDString[tyInfo.FuIDString.Length - 1].Equals(ids))
                {
                    //实例化一项
                    ListItem item = new ListItem();                    //当是根目录是，不加下划线加载，其他情况，随着级别的降低，下划线随之增多
                    if (tyInfo.FuIDString[0] == "0")
                    {
                        item.Value = Convert.ToString(tyInfo.TypeID);
                        item.Text = GetStr(0) + Convert.ToString(tyInfo.TypeName);
                        //添加项
                        this.DropDownList1.Items.Add(item);                       
                        this.dropDownTo.Items.Add(item);
                        //再次循环
                        BindItem(tyInfo.TypeID + "", goodTypeList);
                    }
                    else
                    {
                        item.Value = Convert.ToString(tyInfo.TypeID);
                        item.Text = GetStr(tyInfo.FuIDString.Length)+ Convert.ToString(tyInfo.TypeName);
                        //添加项
                        this.DropDownList1.Items.Add(item);
                        this.dropDownTo.Items.Add(item);
                        //再次循环
                        BindItem(tyInfo.TypeID + "", goodTypeList);
                    }
                }
            }
        }
        //用下划线“_”缩进
        public String GetStr(int lev)
        {
            String str = "";
            //计算下划线的长度并返回
            for (int i = 0; i < lev; i++)
            {
                str += "__";
            }
            return str;
        }
        public string[] FuIDString {
            get
            {
                return TypeFuID.Split('_');
            }
        }