在后面的代码中获取所选项目值

Question

我有一个自定义HTML下拉列表,在ASP.NET项目中使用它.如果用户选择任何项目并将其传递给数据库,我想获取此控件的值.

<select>
       <option tabindex="2" id="Option0" runat="server" value="0" selected="selected">?????? ???? ... </option>
       <option tabindex="2" id="Option1" runat="server" value="1">?? ???? </option>
       <option tabindex="2" id="Option2" runat="server" value="2">?? ????</option>
       <option tabindex="2" id="Option3" runat="server" value="3">?? ????</option>
       <option tabindex="2" id="Option4" runat="server" value="4">???? ????</option>
       <option tabindex="2" id="Option5" runat="server" value="5">??? ????</option>
       <option tabindex="2" id="Option6" runat="server" value="6">?? ????</option>
       <option tabindex="2" id="Option7" runat="server" value="7">??? ????</option>
       <option tabindex="2" id="Option8" runat="server" value="8">??? ????</option>
       <option tabindex="2" id="Option9" runat="server" value="9">?? ????</option>
       <option tabindex="2" id="Option10" runat="server" value="10">?? ????</option>
       <option tabindex="2" id="Option11" runat="server" value="0">????? ????</option>
       <option tabindex="2" id="Option12" runat="server" value="1">?????? ????</option>
       <option tabindex="2" id="Option13" runat="server" value="2">????? ????</option>
       <option tabindex="2" id="Option14" runat="server" value="3">?????? ????</option>
       <option tabindex="2" id="Option15" runat="server" value="4">?????? ????</option>
       <option tabindex="2" id="Option16" runat="server" value="5">?????? ????</option>
       <option tabindex="2" id="Option17" runat="server" value="6">???? ????</option>
       <option tabindex="2" id="Option18" runat="server" value="7">???? ????</option>
       <option tabindex="2" id="Option19" runat="server" value="8">????? ????</option>
       <option tabindex="2" id="Option20" runat="server" value="9">???? ????</option>
   </select>    

如何理解选择了哪个项目并获取此列表的值"如果选择了该值"？

Answer 1

把runat放在select而不是option中.

<select id="ddId" runat="server">
</select>

并使用SelectedValue如下获取值.

string selectedValue= ddId.SelectedValue;