1 <html xmlns="http://www.w3.org/1999/xhtml">
2 <head runat="server">
3 <title></title>
4 <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
5 <script type="text/javascript">
6 $(document).ready(function () {
7 //写法1
8 //var ddl = document.getElementById("<%=ddlDept.ClientID %>");
9 //写法2
10 //var ddl=$("#<%=ddlDept.ClientID%>");
11 alert(ddl.selectedIndex);
12 });
13
14
15 function show(obj) {
16 var v = $(obj).val();
17 alert(v);
18 }
19 </script>
20 </head>
21 <body>
22 <form id="form1" runat="server">
23 <div>
24 <asp:DropDownList runat="server" ID="ddlDept" onchange="show(this)" />
25 </div>
26 </form>
27 </body>
28 </html>
上面是前台代码,下面是后台代码.
1 public partial class WebForm1 : System.Web.UI.Page
2 {
3 protected void Page_Load(object sender, EventArgs e)
4 {
5 List<string> list=new List<string>(){"aaa","bbb","ccc"};
6 ddlDept.DataSource = list;
7 ddlDept.DataBind();
8 ddlDept.SelectedIndex = 2;
9 }
10 }
不知道用jQuery怎么写。
通过js获取DropDownList的选中项
时间： 2024-10-26 04:44:10