selectindexchanged上的asp.net列表框不会触发事件

问题描述：

<asp:ListBox ID="list1" runat="server" Height="200" Style=" margin: 0"   OnSelectedIndexChanged="list1_SelectedIndexChanged">
            <asp:ListItem Selected="True" Value="1">1</asp:ListItem>
            <asp:ListItem Value="2">2</asp:ListItem>
            <asp:ListItem Value="3">3</asp:ListItem>
            <asp:ListItem Value="4">4</asp:ListItem>
        </asp:ListBox>

我在updatePanel中有一个列表框

i have listbox in the updatePanel

但是当我选择某些东西时，它不会触发事件是怎么了?

but when i select something it doesn't fire an event what am doing wrong?

答

您需要将 AutoPostBack 属性设置为True.那么只有回发发生，并且您选择的索引事件将触发.

You need to Set AutoPostBack Property to True. then only Postback happens and your selected index event will fire.

<asp:ListBox AutoPostBack="true" ID="yourLIst" runat="server" Height="200" Style=" margin: 0"   OnSelectedIndexChanged="yourLIst_SelectedIndexChanged">

selectindexchanged上的asp.net列表框不会触发事件

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