RadTabControl destroying content on each selectionchanged?

[Adriano]

We're working on a silverlight 4 RC project and we're using a radtabcontrol binded to a datasource. Each radtabitem has a header template and a content template. In the content template we instantiate an our user control. The problem is that for each tab item selection, the existing user control is destroyed and re-created and this behavior triggers a wcf call that we don't want.

In a previous Silverlight 3 project we used the same template and all is working fine (no re-creation of user control in radtabitem content template).

So, could you help us with this strange behavior?

Regards

Adriano

[Vladislav]

Hello Adriano,

Can we ask you to send us a sample project demonstrating the problem?
From the description supplied it seems that the project is fairly complex and it will be better to have a project in order to be sure that we are investigating "the right issue".

We are awaiting for your response.

Best wishes,
Vladislav
the Telerik team

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[JC]

I am getting the same issue with the last build. Is there a solution to this?

[Hristo]

Hello JC,

Current version of RadTabControl uses a single ContentPresenter to display the data. That means every tab item puts its content into this single content presenter. That is why when selection is changed the content presenter is provided new content (or data context in data bound scenario) and this causes elements to be pulled out from the visual tree.

We are developing functionality to preserve the content state that should be included in our next release - 2011 Q1. The release is scheduled for the second half of March this year.

Unfortunately there is no way to prevent the described content change during selection in the current version, that why we are improving the flexibility.

Hope the Q1 is good time frame for you.

All the best,
Hristo
the Telerik team

[JC]

Thanks. Good news that the content will be preserved with Q1.

[simon]

Did this functionality make it into the q1 2011?? I'm not seeing a difference personally.

S.

[Petar Mladenov]

Hello JC,

Yes, the IsContentPreserved property is exposed in Q1 2011 official release. You can find a good starting article here. Feel free to ask if you need further assistance on this.

Best wishes,
Petar Mladenov
the Telerik team