how-to-expand-and-collapse-TreeView-node-using-image-instead-expander-in-SfTreeView

This repository contains a sample demonstrating how to expand and collapse TreeView node using image instead expander in .NET MAUI TreeView (SfTreeView).

Sample

xaml

<Image Grid.Column="2" Source="{Binding IsExpanded,Converter={StaticResource ExpanderIconConverter}}"
                                       IsVisible="{Binding HasChildNodes,Converter={StaticResource ExpanderIconVisibilityConverter}}"
                                       VerticalOptions="Center" 
                                       HorizontalOptions="Center"
                                       HeightRequest="35" 
                                       WidthRequest="35">

                                    <Image.GestureRecognizers>
                                        <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped" />
                                    </Image.GestureRecognizers>

xaml.cs

private void TapGestureRecognizer_Tapped(object sender, EventArgs e)
{
    var imageIcon = sender as Image;
    var treeViewNode = imageIcon!.BindingContext as TreeViewNode;
    if (treeViewNode!.IsExpanded)
        TreeView.CollapseNode(treeViewNode);
    else
        TreeView.ExpandNode(treeViewNode);
}

Requirements to run the demo

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.

Troubleshooting:

Path too long exception

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.

License

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