This repository demonstrates how to bind and manage selected items in the .NET MAUI TreeView (SfTreeView) control. It provides a sample implementation showing how to synchronize the selection state between the TreeView and the ViewModel, enabling multiple selection and real-time updates through data binding.

    <syncfusion:SfTreeView x:Name="treeView"
                            SelectionMode="Multiple"
                            ChildPropertyName="States" 
                            ItemsSource="{Binding CountriesInfo}"
                            SelectedItems="{Binding SelectedCountries}"
                            AutoExpandMode="RootNodesExpanded">
    </syncfusion:SfTreeView>
</ContentPage.Content>

public class CountriesViewModel
{
    public CountriesViewModel()
    {
        GenerateCountriesModelModelInfo();
    }
    public ObservableCollection<CountriesModel> CountriesInfo { get; set; }

    public ObservableCollection<object> SelectedCountries { get; set; }

    private void GenerateCountriesModelModelInfo()
    {
        this.CountriesInfo = new ObservableCollection<CountriesModel>();
        CountriesInfo.Add(australia);
        CountriesInfo.Add(brazil);
        CountriesInfo.Add(china);
        CountriesInfo.Add(usa);
        CountriesInfo.Add(india);

        SelectedCountries = new ObservableCollection<object>();
        SelectedCountries.Add(nsw);
        SelectedCountries.Add(california);
        SelectedCountries.Add(victoria);
        SelectedCountries.Add(india);
        SelectedCountries.Add(china);
    }
}

To run the demo, refer to System Requirements for .NET MAUI.

Make sure that you have the compatible versions of Visual Studio 2022 with the Dot NET MAUI workload and .NET Core SDK 7.0 or later version in your machine before starting to work on this project.

If you are facing path too long exception when building this example project, close Visual Studio and rename the repository to short and build the project.

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