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Bug Report T1287296
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TreeList for MVC - "System.NullReferenceException" is thrown after updating a model with a read-only property

created 13 days ago (modified 13 days ago)

Steps to reproduce:

  1. Place TreeList Extension in a view.
  2. Create a class with a read-only property.
  3. Bind a collection of class instances to TreeList.
  4. Start editing a node and click the "Update" button.

Expected results:

A node is updated.

Current results:

The following exception is thrown:

Call Stack
System.NullReferenceException: 'Object reference not set to an instance of an object.'

Additional information:

A sample project and a video that show the issue are attached.

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Answers approved by DevExpress Support

created 2 days ago

We have addressed the issue described in this ticket and will include a fix in our next maintenance update. Should you need to apply our fix prior to official release, you can request a hotfix here.

Important Notes:

  • Hotfixes may be unavailable for Early Access/Beta builds or updates set for release within a week.
  • .NET only: in the NuGet Package Manager, use your personal NuGet feed and check the "Include prerelease" option to view the hotfix package in the "Updates" tab.
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