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SelectedItems and MVVM

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Ludwig
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Ludwig asked on 04 Mar 2011, 08:31 AM
Hi,

small question: how can I databind SelectedItems of a gridview to a collection of my viewmodel? I have a gridview with SelectionMode set to Extended:

<telerik:RadGridView Name="patientsGridView" SelectionMode="Extended" ItemsSource="{Binding Patients}" SelectedItem="{Binding SelectedPatient}" AutoGenerateColumns="False" IsReadOnly="True" >           
 
and the viewmodel would contain:

public ObservableCollection<PatientViewModel> SelectedPatients { ... }

But how can I bind the grid's SelectedItems to the viewmodel's SelectedPatients?

Thanks,
Kind regards,
L

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Vlad
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answered on 04 Mar 2011, 09:40 AM
Hi,

 You can check this blog post for more info. 

Greetings,
Vlad
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Ludwig
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answered on 07 Mar 2011, 04:44 PM
I tried it, but how can I get notified when the selection changes (without using code behind)?
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Ted
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answered on 15 May 2014, 12:56 AM
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Brennan
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answered on 07 Oct 2016, 08:29 PM
I'm curiou as to why people keep posting this blog as an answer.  It doesn't work at all.
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Dilyan Traykov
Telerik team
answered on 11 Oct 2016, 08:33 AM
Hello Brennan,

For brevity, only part of the full code has been included in the blog post. A working version, however, has been provided at the bottom of the post. For your convenience, I'm attaching it here as well.

You can also find a similar example in the SDK Samples Browser with the title Binding SelectedItems From ViewModel.
 
I hope you find this helpful. Do let me know if you have any other questions or concerns.

Regards,
Dilyan Traykov
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Brennan
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answered on 11 Oct 2016, 01:54 PM

Hi Dilyan,

I was actually using the full code example on the blog post and still could not get it to work.  The github SDK example, however, I was able to get working, once I realized the view model SelectedItems property does not have a setter. I was trying to two-way bind the setter, and was expecting my viewmodel to be updated right as the selection in the grid changed, which obviously would not work in this case.  Once I explicitly called the getter on my viewmodel selecteditems collection, I got the expected result.

Thanks,

Pradeep
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commented on 25 Nov 2021, 01:09 PM

Hi Brennan,

What do you mean by "Once I explicitly called the getter on my viewmodel selecteditems collection, I got the expected result." Please explain.

 I am trying the two way binding of SelectedItems collection of my viewmodel. Thanks. 
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Ludwig
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Vlad
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Ludwig
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Ted
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Brennan
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Dilyan Traykov
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