WPF + TabControl Scope

Question

In my WPF project I have a TabControl with several tab items. Each Tab Item has a WPF control (view) and each view has a correspondent ViewModel. Each time I click to change tab item I noticed that the control/view is unload and loaded again when I click the tab item again, the correspondent ViewModel stays in memory.

I m trying t build a simple RemoteDesktop/RDP client that uses 1 tab item per computer connection, so the problem is when I change tab item, the connection goes away because the view is unloaded...

I researched for some examples out there, but most of them are built in top of Winforms that has a different implementation from WPF.

So I was thinking if it is possible to prevent the View from going out of scope when I change from TabItem?

Does Any one knows about some sample online that uses WPF for tabbed RDP connections? Thank you.

UPDATE - DataTemplate being used

<DataTemplate DataType="{x:Type vm:DashboardViewModel}">
        <v:DashboardView />
</DataTemplate>

How do you implement the relationship between the views and the viewmodels? I mean... TabControlView <-> TabControlViewModel, TabItemView <-> TabItemViewModel, etc. How do you instantiate them? — Massimiliano Kraus, Dec 01 '16 at 09:33
Hi, I m using a different DataTemplate for each TabItem. I updated the initial post for you to see it. — J_PT, Dec 01 '16 at 14:33
Ok. Do you do something in the `Load` event or in the `GotFocus` event of the tabs? — Massimiliano Kraus, Dec 01 '16 at 14:38

score 0 · Accepted Answer · edited May 23 '17 at 12:01

0

I found a solution here

WPF TabControl - Preventing Unload on Tab Change?

replace

      <TabItem Header="Tab1" Content="{Binding Tab1ViewModel}" />
by

        <TabItem Header="Tab1">
            <ContentPresenter Content="{Binding Tab1ViewModel}" />
        </TabItem>

edited May 23 '17 at 12:01

Community

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answered Dec 03 '16 at 14:13

J_PT

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WPF + TabControl Scope

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