如何防止下拉列表事件在asp.net中的页面刷新? [英] how to prevent page refresh in asp.net on dropdown list event?

问题描述

我正在开发我的asp.net网站，我的要求是在DropDownList1的SelectedIndexChanged事件上刷新DropDownList2，我已设置

I am developing my asp.net website, my requirement is to refresh DropDownList2 at SelectedIndexChanged event of DropDownList1, I have set

AutoPostBack="True"

用于DropDownList1.现在的问题是整个网页都被刷新了，这对我来说是不必要的，是否有什么其他技术可以用来仅刷新该控件或该面板而不是刷新整个页面?

for DropDownList1. Now the problem is whole web page gets refreshed, its unnecessary for me, is there any other technique that i can use to refresh only that control or only that panel rather than refreshing whole page?

推荐答案

hi，

尝试使用UpdatePanel:

http://ajax.net-tutorials.com/controls/updatepanel-control/ [ ^ ]

http://msdn.microsoft.com/en-us/library/system. web.ui.updatepanel.aspx [ ^ ]

http://msdn.microsoft.com/en-us/library/bb399001.aspx [ ^ ]

问候
罗伯特

try to user UpdatePanel:

http://ajax.net-tutorials.com/controls/updatepanel-control/[^]

http://msdn.microsoft.com/en-us/library/system.web.ui.updatepanel.aspx[^]

http://msdn.microsoft.com/en-us/library/bb399001.aspx[^]

Regards
Robert

在此之间编写代码

Write the code between this

<asp:ScriptManager ID="ScriptManager1" runat="server" />
       <asp:UpdatePanel runat="server" id="UpdatePanel" updatemode="Conditional">

           <ContentTemplate>

           </ContentTemplate>
             <Triggers>
         <asp:Asyncpostbacktrigger controlid="DropDownList2" eventname="SelectedIndexChanged" />
       </Triggers>
       </asp:UpdatePanel>

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