I got exception :
Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead.
I got exception : Operation is not valid while ItemsSource is in use. Access
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I got exception :
Operation is not valid while ItemsSource is in use. Access and modify elements with ItemsControl.ItemsSource instead.
You must add the items to your source-collection that is set to
ItemsSource. After you have set theItemsSource-property to a value, its no more possible to use theItems-property (besides you setItemsSourcenewly to null).ItemsandItemsSourceexclude each other.If you use
ItemsSource, your source-collection must implementINotifyCollectionChangedso that it will inform theListViewabout changes. If not, added items to it will not change theListView. E.g. if you useList<T>as items-source, changes will not be forwarded.There exist classes that do that for you such as
ObservableCollection<T>.