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An exception occurred when ComboBoxAdv enabled AutoCompleteMode="Suggest"

I use ComboBoxAdv in the Treeview control template and set AutoCompleteMode="Suggest" to filter. When there are multiple rows of data in the list, entering values in a certain row of ComboBoxAdv to filter will cause the current options of other rows of ComboBoxAdv to be cleared

Attachment: Img__facd16af_69a2d247.zip

1 Reply

BA BagavathiPerumal Apranandham Syncfusion Team March 13, 2023 02:39 PM UTC

Hi Wpfdev1 Kunyi,

Each combo box should have unique item sources. If you want to map to the same ItemsSource, you can create a converter that gives a new CollectionViewSource for each ItemsSource binding. Please refer to the below code snippets for your reference.

Code snippets:

<local:CustomViewConverter x:Key="customViewConverter"/>

ItemsSource="{Binding States, Converter={StaticResource customViewConverter}}"

public class CustomViewConverter : IValueConverter
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
return new CollectionViewSource { Source = value }.View;
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
throw new NotImplementedException();
We have attached a sample for your reference. Please let us know if you need any further assistance.

Bagavathi Perumal A

Attachment: ComBoBoxAdvAutoComplete_3360af97.zip

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