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MVVM and filtering nodes in TreeListView

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TreeListView
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meteorrr
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meteorrr asked on 28 Mar 2010, 03:07 PM
Hello,
I'd like to know solutions how to implement filtering nodes in treelistview.
At the moment I implemented datamodel/viewmodel but I have no idea how to implement filtering.
My first thought was to add a bool flag in my ViewModel indicating if node should be visible or not.. but I don't know how to hide nodes/nodegroups.
Rebuilding whole datamodel is not a good solutuion.

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Miroslav
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answered on 01 Apr 2010, 12:49 PM
Hello meteorrr,

Thanks for trying out the TreeListView. Please note that it is a CTP and major changes are expected for the Q2 release. It is best not to base any production code on it.

Indeed filtering may be a bit tricky to implement in hierarchical data. In WPF this can be done by applying a filter to the Items collection on the TreeView (or any ItemsControl) but in Silverlight this is not possible.

Since the Silverlight TreeView does not support built-in filtering changing the data model will be my suggestion here.

This may sound a bit unnecessary and radical - I am building a sample project that will show how this can be done more transparently. I will follow up here when it is ready.

Kind regards,
Miroslav
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Miroslav
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