ASP.NET DropDownList SelectedIndex 属性
定义和用法
SelectedIndex 属性用于获取或设置 DropDownList 中被选项目的索引号。
实例
下面的实例输出了被选项目的文本:
1 | <div class = "example_code notranslate" ><script runat= "Server" ><br> Sub GetName(obj As Object, e As EventArgs)<br> lbl.Text = ddList.SelectedItem.Text<br> End Sub<br> </script><br><br> <form runat= "Server" ><br> Select a name from the list:<br> <asp:DropDownList id= "ddList" runat= "Server" ><br> <asp:ListItem Text= "Peter" /><br> <asp:ListItem Text= "Lois" /><br> <asp:ListItem Text= "Cleveland" /><br> <asp:ListItem Text= "Quagmire" /><br> <asp:ListItem Text= "Joe" /><br> </asp:DropDownList><br><br> <asp:Button Text= "Select" <br> OnClick= "GetName" Runat= "Server" /><br> <br /><br> Name is:<br> <asp:Label id= "lbl" Runat= "Server" /><br> </form></div>
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