listview binding selectedItems

Question

I'm able to bind to the ItemSource no problem.

What I'm unable to do is bring back the SelectedItems and have them show in the listView.

I'd like to be able to have the listView display the checked items if it is found in the assignedChores collection. What am I doing incorrectly?

<ListView x:Name="choreList" BorderBrush="White" BorderThickness="1"     
Margin="401,322,613,150" Grid.Row="1" DisplayMemberPath="Summary"     
ItemsSource="{Binding choreList, Mode=OneWay}"     
SelectedItem = "{Binding personSingle.assignedChores, Mode=TwoWay}"     
SelectionMode="Multiple" SelectionChanged="choreList_SelectionChanged"/>

Is personSingle.assignedChores a List<T> or an object?

Farhan Ghumra
– Farhan Ghumra

2013-10-11 09:34:50 +00:00
Commented Oct 11, 2013 at 9:34 — Farhan Ghumra
– Farhan Ghumra, Commented Oct 11, 2013 at 9:34

Farhan Ghumra · Accepted Answer · 2013-10-11 10:01:32Z

4

ListView has SelectedItems property which is type of IList<T> but it's read only, so you can't bind it. SelectedItem can be bound to an object not to the List<T>.

You have only option, that's you need to bind ListViewItem's IsSelected property with ViewModel's property.

public class MyListView : ListView
{
    protected override void PrepareContainerForItemOverride(Windows.UI.Xaml.DependencyObject element, object item)
    {
        base.PrepareContainerForItemOverride(element, item);
        ListViewItem listItem = element as ListViewItem;           
        Binding binding = new Binding();
        binding.Mode = BindingMode.TwoWay;
        binding.Source = item;
        binding.Path = new PropertyPath("IsSelectedFromViewModel");
        listItem.SetBinding(ListViewItem.IsSelectedProperty, binding);
    }
}

answered Oct 11, 2013 at 10:01

Farhan Ghumra

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7 Comments

webdad3 Over a year ago

is there another control that will take bindings for lists without having to roll my own?

Farhan Ghumra Over a year ago

No it's not because all the view controls are derived from ListViewbase class.

webdad3 Over a year ago

so everyone that wants to bind a list to a listview has to roll their own? Seems like MSFT should add that functionality to the control no? Oh well I will roll my own like you suggest and see where that goes.

Farhan Ghumra Over a year ago

Might be helpful, Managing Multiple selection in View Model (.NET Metro Style Apps)

Francesco Bonizzi Over a year ago

Look at this: It's another way to solve the problem

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