How to expand the particular node in .NET MAUI TreeView (SfTreeView)?

In .NET MAUI TreeView, you can expand the particular node using the ExpandNode method.

C#

Here, we expanded the specific node (Downloads) using TreeView.Loaded event.

public class Behavior : Behavior<SfTreeView>
{
    SfTreeView treeView;
    protected override void OnAttachedTo(SfTreeView bindable)
    {
        treeView = bindable;
        treeView.Loaded += OnTreeViewLoaded;
        treeView.CollapseAll();
        base.OnAttachedTo(bindable);
    }
    
    private void OnTreeViewLoaded(object sender, Syncfusion.Maui.TreeView.TreeViewLoadedEventArgs e)
    {
        int totalNodes = treeView.Nodes.Count();
        for (int i = 0; i < totalNodes; i++)
        {
            TreeViewNode node = treeView.Nodes[i];
            var content = (node.Content as Folder).FileName;
            if (content.ToString() == "Downloads")
            {
                treeView.ExpandNode(node);
            }
        }
    }
    
    protected override void OnDetachingFrom(SfTreeView bindable)
    {
        treeView.Loaded -= OnTreeViewLoaded;
        base.OnDetachingFrom(bindable);
    }
} 

Download the complete sample from GitHub

Conclusion:

I hope you enjoyed learning how to expand the particular node in .NET MAUI TreeView (SfTreeView).

You can refer to our .NET MAUI TreeView feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started with configuration specifications.

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