This sample illustrates how to get the node in WPF TreeView (SfTreeView).
In SfTreeView, you can get the node based on the item bound with it using SfTreeView.GetItemInfo method.
<syncfusion:SfTreeView x:Name="sfTreeView" Grid.Row="1" ExpandActionTrigger="Node" AutoExpandMode="AllNodes"
ChildPropertyName="SubFiles"
FullRowSelect="True"
ItemsSource="{Binding ImageNodeInfo}">
<syncfusion:SfTreeView.ItemTemplate>
<DataTemplate>
<Grid x:Name="grid">
<Grid Grid.Row="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid>
<Image Source="{Binding ImageIcon}"
VerticalAlignment="Center"
HorizontalAlignment="Center"
Height="16"
Width="16"/>
</Grid>
<Grid Grid.Column="1"
Margin="1,0,0,0"
VerticalAlignment="Center">
<TextBlock Text="{Binding ItemName}"
Foreground="Black"
FontSize="13"
VerticalAlignment="Center" />
</Grid>
</Grid>
</Grid>
</DataTemplate>
</syncfusion:SfTreeView.ItemTemplate>
</syncfusion:SfTreeView>var treeViewInfo = sfTreeView.GetItemInfo((this.DataContext as FileManagerViewModel).ImageNodeInfo.FirstOrDefault(x => x.ItemName == "Documents"));
var node = treeViewInfo.Node;Visual Studio 2015 and above versions