1. Feedback
  2. Blazor
  3. 57023

Welcome to the Blazor feedback portal. We’re happy you’re here! If you have feedback on how to improve the Blazor, we’d love to hear it!

  • Check out the features or bugs others have reported and vote on your favorites. Feedback will be prioritized based on popularity.
  • If you have feedback that’s not listed yet, submit your own.

Thanks for joining our community and helping improve Syncfusion products!

1
Vote

TreeView drag and drop fails when using Self-referential data

Using this example:

https://blazor.syncfusion.com/documentation/treeview/data-binding#self-referential-data

Add AllowDragAndDrop="true" to SfTreeView

Dragging the nodes works, but when attempting to drop, the UI freezes and an exception is raised.

blazor.server.js:1  Uncaught (in promise) Error: System.NullReferenceException: Object reference not set to an instance of an object.
   at Syncfusion.Blazor.Navigations.SfTreeView`1.TriggerDragStopEvent(DragAndDropEventArgs args, Double left, Double top, DotNetObjectReference`1 instance)
    at y.endInvokeDotNetFromJS (blazor.server.js:1:3502)
    at Xt._invokeClientMethod (blazor.server.js:1:61001)
    at Xt._processIncomingData (blazor.server.js:1:58476)
    at Xt.connection.onreceive (blazor.server.js:1:52117)
    at s.onmessage (blazor.server.js:1:80262)