How can I select or unselect all the items in ComboBoxAdv?

You can select or unselect all the items by using the SelectedItems property of the ComboBoxAdv.

The following example illustrates how you can select or unselect the items in Button-click command using the SelectedItems property.

XAML

Model

ViewModel

The following screenshot displays the items when the “Click to select all items” button is clicked.

Figure 1: “Click to select all items” button is clicked

The following screenshot clears all the items when the “Click to unselect all items” button is clicked.

Figure 2: “Click to unselect all items” button is clicked