Filtering SfTreeGrid Items Before Displaying It

Question

Hi,I have a SfTreeGrid and I want to filter the items it displays based on some condition BEFORE displaying the SfDataGrid.The problem is, I cannot assign the filtering predicate delegate as shown in the documentation (Filtering in WPF TreeGrid control | Syncfusion) because at that moment the SfTreeGrid.View property returns null.How can I achieve that?

Vijayarasan Sivanandham · Answer

Hi Alexander Tashkov,

We have checked the reported scenario from our end. The reported problem occurs
due to accessing the view filter before it's created completely in SfTreeGrid.

However, you can overcome this by accessing the view after it's created using the Loaded event. Refer to the below code snippet,

//Event subscription
  treeGrid.Loaded += OnLoaded;
   
  // Event customization
  private void
  OnLoaded(object sender, RoutedEventArgs e)
  {   
      // Set the Filter predicate
     
  treeGrid.View.Filter = FilerNodes;
     
  treeGrid.View.RefreshFilter();
  }

API Link: View

Note: The view will be created after assigning the ItemsSource in
SfTreeGrid.

Find the sample demo in the attachment.

Regards,Vijayarasan SIf this post is helpful, please consider Accepting it as the
solution so that other members can locate it more quickly.Attachment: SfTreeGridDemo_13455591.zip