C# reset wpf toolkit CheckComboBox

Question

I have a CheckComboBox from the wpfToolkit and i want to reset it. That means that all items in the CheckComboBox are unchecked. Already tried to set the SelectedValue to an empty string. This works for the function itself, but in the UI the items are still checked.

I also work with Bindings and the MVVM pattern:

 <wpfTool:CheckComboBox IsSelectAllActive="True"  ItemsSource="{Binding Filter, UpdateSourceTrigger=PropertyChanged}" SelectedValue="{Binding SelectedFilterItem, UpdateSourceTrigger=PropertyChanged}" Width="140"/>

Try setting the binding mode of `SelectedValue` to `TwoWay`. — WSC, Jun 25 '21 at 07:49
I tried Mode=TwoWay, but i doesn't change anything. These methods could not be found. Do i need something else? — Donkanaille, Jun 25 '21 at 09:30

score 0 · Answer 1 · answered Jun 25 '21 at 08:18

0

The following should work for the SelectedValue property:

SelectedValue="{x:Bind SelectedFilterItem, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

Then you should be able to reset it to null by changing your SelectedFilterItem property.

answered Jun 25 '21 at 08:18

Balazs Szekeres

95
7

1

Thank you for your comment, but i think x:Bind is not available in WPF according to this: https://stackoverflow.com/questions/60153403/wpf-c-sharp-net-framework-4-8-xbind – Donkanaille Jun 25 '21 at 09:17

score 0 · Accepted Answer · answered Jun 25 '21 at 11:27

0

I found a solution that worked for me. Its important to set SelectedValue and SelectedItem to null. Also set Mode=TwoWay and UpdateSourceTrigger=PropertyChanged to be sure.

answered Jun 25 '21 at 11:27

Donkanaille

29
1
4

C# reset wpf toolkit CheckComboBox

2 Answers2