input hidden and updatePanel (a story of ASP.NET AJAX)
-
06-07-2019 - |
Question
How can update a input hidden inside an UpdatePanel on an AsyncPostBack?
The user click a button outside the panel. The method associated with click event update the value of the input (it has runat="server" property).
I can't update the value of this input.
I need to store a value to use in the following postback. Maybe I can use session to store this value.
Any advice?
Thank you!
Solution 4
No way. The only way to update an input is to do a complete post. It's better to use the object Session.
OTHER TIPS
Because its a postback, you might have to perform a check in the post back event and perform the update. If not, you might have to override an earlier event. See http://msdn.microsoft.com/en-us/library/dct97kc3.aspx
If you are needing to have the update panel (and its contents) updated based on the user clicking on a button which is not in the update panel, add a section to the update panel like the following:
<asp:Button ID="btnOK" runat="server"/>
<asp:UpdatePanel ID="pnlMyPanel" runat="server">
<ContentTemplate>
<!-- Content to get updated -->
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnOK" />
</Triggers>
</asp:UpdatePanel>
The triggers section in the above example tells the update panel to update if the button is clicked.
You might want to try an <asp:HiddenField>
rather than an <input type='hidden' runat='server'>
. I think the asp.net version is more post-back aware.