ASP.NET DropDownList SelectedIndex 屬性


DropDownList 控件 DropDownList 控件

定義和用法

SelectedIndex 屬性用於獲取或設置 DropDownList 中被選項目的索引號。


實例

下麵的實例輸出了被選項目的文本:

<script runat="Server">
Sub GetName(obj As Object, e As EventArgs)
  lbl.Text = ddList.SelectedItem.Text
End Sub
</script>

<form runat="Server">
Select a name from the list:
<asp:DropDownList id="ddList" runat="Server">
  <asp:ListItem Text="Peter" />
  <asp:ListItem Text="Lois" />
  <asp:ListItem Text="Cleveland" />
  <asp:ListItem Text="Quagmire" />
  <asp:ListItem Text="Joe" />
</asp:DropDownList>

<asp:Button Text="Select"
OnClick="GetName" Runat="Server" />
<br />
Name is:
<asp:Label id="lbl" Runat="Server"/>
</form>


DropDownList 控件 DropDownList 控件