问题
I have a view and ViewModel that are working perfectly. I have recently added an AutocompleteBox (found in the WPF Toolkit) which allows users to quickly look up an item.
My view is as such:
- An ItemsControl containing my CollectionViewSource named People. Generating perfectly
- An AutocompleteBox where the dropdown shows only the items containing the values the user is typing in the AutocompleteBox. Works well. If I type John, all of the people in my CollectionViewSource named People with the word John in the name appear in the dropdown.
My issue is: how do I filter my ItemsControl when the user selects the item he wishes to see from the Dropdown?
My code so far in XAML to bind the data:
<toolkit:AutoCompleteBox Height="25" Width="400"
Foreground="AliceBlue"
ItemsSource="{Binding People.View}"
ValueMemberPath="Name"
Text="{Binding Name}"
IsTextCompletionEnabled="True"
FilterMode="Contains"
Background="#303030">
<toolkit:AutoCompleteBox.ItemTemplate>
<DataTemplate>
<Grid Width="360" HorizontalAlignment="Left">
<StackPanel Orientation="Vertical" HorizontalAlignment="Left"
VerticalAlignment="Top" Width="300">
<TextBlock Text="{Binding Name}" FontWeight="SemiBold" Foreground="#25A0DA"
FontSize="14" Width="300"/>
<TextBlock Text="{Binding Status}" FontWeight="Normal" Foreground="White"
FontSize="10" Width="300"/>
</StackPanel>
</Grid>
</DataTemplate>
</toolkit:AutoCompleteBox.ItemTemplate>
</toolkit:AutoCompleteBox>
<ItemsControl x:Name="tStack" Grid.Column="0" Grid.Row="1"
ItemsSource="{Binding People.View}"
HorizontalAlignment="Stretch" VerticalAlignment="Stretch"
BorderThickness="0.5">
</ItemsControl>
The itemsControl is styled and the format of the items inside it are also templated/styled but far too long and unconstructive to post here.
回答1:
From the Name
property setter in your viewmodel to which toolkit:AutoCompleteBox.Text
is bound, you will have to filter the ObservableCollection backing your Collectionview
i,e ItemsSource
of your ItemsControl
.
If you have your Collectionsource with you then you can have filter applied to it like below:
ICollectionView _peopleView = CollectionViewSource.GetDefaultView(peoples);
_peopleView .Filter = PeopleFilter
private bool PeopleFilter(object item)
{
People people= item as People;
return people.Name.Contains( _filterString ); //Here filter string will be your Name prperty value
}
From Setter of name property you will hav to call _peopleView .Refresh()
; to apply the filter
Thanks
来源:https://stackoverflow.com/questions/18587509/wpf-filtering-a-datacollection-with-an-autocompletebox