ASP.Net DropDownList綁定樹狀結構

獲取父節點  開始調用  listSource 是List<> 數據集合 （有父子關係）

foreach (ModelInfo Item in listSource)

                   {

                       if (Item.ParentID == 0)

                       {

                           ListItem li = new ListItem();

                           li.Text = Item.Item; 

                           li.Value = Item.ID.ToString();                       

                           YouDropDownList.Items.Add(li);

                           BindDDLData(YouDropDownList, listSource, Item, "├à─¤─¤");

                       }

                   }

遞歸綁定

 

private void BindDDLData(DropDownList Ddl, List<ModelInfo> List, ModelInfo CurrentInfo, string separator)

    {

        var quer = (from c in List

                    where c.ParentID == CurrentInfo.ID

                    select c);     

        foreach (var item in quer)

        {            

            ListItem li = new ListItem();

            li.Text = separator + item.Item; 

            li.Value = item.ID.ToString();             

            Ddl.Items.Add(li);

            string separator_ = separator + "─¤─¤─¤";

            BindDDLData(Ddl, List, item, separator_);

        }

    }