Tree, Menu, etc not usable in UpdatePanel. Any workarounds?

I spent a long (probably too long before checking the forums) time tracking down the "0.cells is null or not an object" problem. To come to find out that the tree, the menu, and the grid don't work with the UpdatePanel (See notes near bottom ofhere).

I'm wondering if there are any workarounds that anyone has come up with. This kinda sucks since part of my design was to use a goodly amount of popups that allow modifications and those are nicely handled using menus, trees, and such. I know that microsoft says they're working on some ajax based controls that wrap these other controls up. But the need is kinda here and now (Maybe I just don't have a latest update of ACT or something?) Anyway using Telerik or some other commercial control is just not feasible in my budget at the moment. So I thought I'd see if anyone had any workarounds.

For that matter does anyone have any workarounds for accordions to make them horizontal (to make them open and close left to right instead of up and down)?

I'm thinking that some other people have experienced some problems such as these and might be working on some ideas as far as workarounds.If so then perhaps we could "band together" and create an area on CodePlex (and possibly some referers at google, sourceforge and the like) to at least give some pointers to some other efforts to expand on the ACT.

Anyway just wanted to throw that alternate idea out there, but if anyone has any viable workarounds for the lack of support of trees, grids, and menus in the UpdatePanel, I and probably many others would be glad to hear about it.

Thanks in advance,
Christopher

The UpdatePanel included in the .Net framework 3.5 supports having treeview and menu controls in them. There is a go live license for VS 2008. Maybe you can use VS 2008

http://blogs.msdn.com/somasegar/archive/2007/09/08/asp-net-enhancements-in-vs2008-and-net-fx3-5.aspx

I am not sure that the TreeView is supported in .NET 3.5. My suggestion is to use any third pary javascript library for the treeview and use WebService for the data transfer.

yeah moving up to VS2k8 and moving up to .NET 3.X (3.5 in beta) doesn't seem like an option (at this point) to have this "design paradigm" adopted. It means to many other adoption points. Hmm I'll keep you all updated I guess as far as any solutions, but if anyone else has something to contribute I'm quite willing to work with them. In my mind this begs further investigation. ;-)

Controls that Are Not Compatible with UpdatePanel Controls

The following ASP.NET controls are not compatible with partial-page updates, and are therefore not supported inside anUpdatePanel control:

TreeView andMenu controls.

Web Parts controls. For more information, seeASP.NET Web Parts Controls.

FileUpload controls when they are used to upload files as part of an asynchronous postback.

GridView andDetailsView controls when their EnableSortingAndPagingCallbacks property is set totrue. The default isfalse.

Login,PasswordRecovery,ChangePassword, andCreateUserWizard controls whose contents have not been converted to editable templates.

TheSubstitution control.

Validation controls, which includes theBaseCompareValidator,BaseValidator,CompareValidator,CustomValidator,RangeValidator,RegularExpressionValidator,RequiredFieldValidator, andValidationSummary control.

Yes that's what I was saying in my original post when I said that they don't work with an update panel and referred to the document thru a link. So I guess I'm missing your point in posting that with no statements by you. Is there some workaround that I'm missing in my reading of it?

Thanks in advance,
Christopher

trouble finding a sample using usercontrols and updatepanels

Hi all,

We have created a menu system primairy based on inserting usercontrols inside one single designed page with several areas's. This works very nice for our sites. Of coarse postback occurs on every click or change.

Some functionality inside usercontrols do a lot of postback, so I would be nice to use the update panel for this type of change.

When trying to implement this I ran into all sorts of trouble, so my first step is to hit this forum. From what i find i'm not the only one having some trouble using usercontrols in combination with the update panel.

So question: Does anyone have a working sample which i could have a look at. Probably can't use it 1 on 1 but well it would a nice starting point.

thanks,

-- jan willem

ps. Does anyone notice .. that all the the ajax stuff (including of coarse atlas) looks REAL nice but when u start to implement it it does realy really takes a lot of time learning to program again :-) Well it's new (ehh well kinda), better and customers do love it.

I wrote a sample to have a test with Ajax and User Control.

http://www.box.net/public/static/q4ltbl5an9.zip

It's simple and straight forward:

1. One user control is linkbutton group, auto generated during runtime;

2. Another user control is to display information according to the user control above;

3. Event subscription is used for information delivery.

4. The link which clicked should be set into different style.

Hope it's helpful.

This was researched days before, now I'm running into the problem of Atlas in live.com. It seems doesn't work with EFP at all!

Thanks for the sample it is usefull!

The only trouble is that the atlas controls (scriptmanager, updatepanel) are still created in the page and not in the usercontrol.

I've created a very simplistic sample of what i'm looking for. Just a page and a usercontrol. I put them in the link below.

http://www.bataviagroep.nl/sampleAtlasUC.zip

- default.aspx --> no atlas, just page and usercontrol doing what it should do .. handling click
- atlas-page.aspx --> same as above, all in one page using atlas and working fine (i added the picture so it's very clear that only the notfication changes

- default-atlas.apsx (same as the first default.aspx) but with the atlas inserted in the usercontrol. This one throws the following exeption:

"The UpdatePanel 'UpdatePanel1' was not present when the page's InitComplete event was raised. This is usually caused when an UpdatePanel is placed inside a template."

For those who don't like downloading stuff from a different server:

default.aspx
<body>
<formid="form1"runat="server">
<div>
<asp:PanelID="panel1"runat="server"/>
</div>
</form>
</body
code behind:
ProtectedSub Page_Load(ByVal senderAsObject,ByVal eAs System.EventArgs)HandlesMe.Load

panel1.Controls.Add(Page.LoadControl("~/uc-atlas.ascx"))

EndSub

The usercontrol uc.ascx
<asp:LinkButtonID="LinkButton1"runat="server">click A</asp:LinkButton>
<asp:LinkButtonID="LinkButton2"runat="server">click B</asp:LinkButton>
<br/><br/>
<asp:LabelID="Label1"runat="server"Text="Label">not clicked</asp:Label
code behind:

ProtectedSub LinkButton1_Click(ByVal senderAs System.Object,ByVal eAs System.EventArgs)Handles LinkButton1.Click

Label1.Text ="clicked A"

EndSubProtectedSub LinkButton2_Click(ByVal senderAs System.Object,ByVal eAs System.EventArgs)Handles LinkButton2.Click

Label1.Text =

"clicked B"EndSub

The same user control but then with atlas stuff added:

<atlas:ScriptManagerID="ScriptManager1"runat="server"EnablePartialRendering="true">

</atlas:ScriptManager>

<asp:LinkButtonID="LinkButton1"runat="server">click A</asp:LinkButton>

|

<

asp:LinkButtonID="LinkButton2"runat="server">click B</asp:LinkButton>

<

br/>

<

br/>

<

atlas:UpdatePanelID="UpdatePanel1"runat="server"><ContentTemplate><asp:LabelID="Label1"runat="server"Text="Label">not clicked</asp:Label></ContentTemplate><Triggers><atlas:ControlEventTriggerControlID="LinkButton1"EventName="Click"/><atlas:ControlEventTriggerControlID="LinkButton2"EventName="Click"/></Triggers>

</

atlas:UpdatePanel>

code behind is the same as above.

--> the above doesn't work and throws an expection.

I would love a sample or idea how to fix this

thanks,

-- jan willem

ps. all the code is in the zipfile

load the custom user control in the Page_Init event, it will work then

wow that worked ...

great that was th easy asnwer i kept missing thanks!

--jw

You might try putting a Placeholder control inside the content template of the UpdatePanel, use FindControl() on the UpdatePanel to locate the Placeholder, and use Placeholder.Controls.Add() to add your dynamically created user control from LoadControl().

The key here is that the container for the user control must exist before OnInit(), and the only way to accomplish this is the declaratively put something there first.

I have gotten this scenario to work. Adding anything directly to the UpdatePanel after OnInitComplete() will not work.