How to Implement Multiselect in WPF RadGridView without any codebehind


You can achieve this with the help of Behavior in WPF. Create one multiselect behavior and attach it to RadGridView. This way you can avoid any code behind code altogether and can implement multiselect in proper MVVM way.

How did I fix it

Create a property of type ObservableCollection in your ViewModel like as shown below.

public ObservableCollection<object> SelectedItems { get; set; }

Now create a MultiselectBehavior as shown below. You have to add reference to System.Windows.Interactivity.dll

public class MultiSelectBehavior : Behavior<radgridview>
        protected override void OnAttached()
            ((YourViewModel)this.AssociatedObject.DataContext).SelectedItems = this.AssociatedObject.SelectedItems;

Now add this behavior to RadGridView as shown below. Also don’t forget to make selectionmode=”Extended”. This will help you to select row by pressing ctrl key.

<telerik:radgridview itemssource="{Binding AvailableSignals, Mode=TwoWay}"  SelectionMode="Extended">

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Libish Varghese Jacob

Libish Varghese JacobI am currently working as a lead engineer in one of the leading wind turbine manufacturing firm. I have wide range of interests and getting my hands dirty in technology is one among them. I use this platform primarily as my knowledge base. I also use this platform to share my experience and experiments so that it might help someone who is walking the way I already did. The suggestions expressed here are the best to my knowledge at the time of writing and this may not necessarily be the best possible solution. I would pretty much appreciate if you could comment on it to bring into my notice on what could have been done better.