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ASP.NET SelectedIndex 属性

ASP.NET SelectedIndex 属性表示列表中选定项的序号索引

范例

下面的范例获取 RadioButtonList 控件中的某个 ListItem 的索引

<script runat="server">
Sub Change(obj As Object, e As EventArgs)
  Response.Write("Selected index: " & rb1.SelectedIndex)
End Sub
</script>
<form runat=server>
<asp:RadioButtonList id="rb1" 
    AutoPostBack="true" 
    runat="server" 
    OnSelectedIndexChanged="Change">
  <asp:ListItem Text="Item 1" />
  <asp:ListItem Text="Item 2" />
</asp:RadioButtonList>
</form>

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