Treeview and multi selections

[Mark]

I am following this article:

Selection - TreeView - Kendo UI for Angular (telerik.com)

that shows using this directive:

[kendoTreeViewSelectable]="selection"

does the trick. However, in my code I am getting:

ERROR NullInjectorError: R3InjectorError(AwaAssetEditorModule)[TreeViewComponent -> TreeViewComponent -> TreeViewComponent -> TreeViewComponent]: 
  NullInjectorError: No provider for TreeViewComponent!
    at NullInjector.get (core.mjs:7493:27)
    at R3Injector.get (core.mjs:7914:33)
    at R3Injector.get (core.mjs:7914:33)
    at R3Injector.get (core.mjs:7914:33)
    at R3Injector.get (core.mjs:7914:33)
    at ChainedInjector.get (core.mjs:12084:36)
    at lookupTokenUsingModuleInjector (core.mjs:3201:39)
    at getOrCreateInjectable (core.mjs:3246:12)
    at Module.ɵɵdirectiveInject (core.mjs:10041:12)
    at NodeInjectorFactory.SelectDirective_Factory [as factory] (progress-kendo-angular-treeview.mjs:95:105)

Line 95 has something to do with a version of the software. I am running version 13.4.0. Is it compatible with this multi select functionality?

Thanks

[Mark]

No need for help. I figured it out.

[Johnathan]

Can you please share your solution?

Thanks!

[Zornitsa]

Hi,

The mentioned error generally occurs when a service is trying to be injected but has no corresponding provider declared. More information regarding this error is available in the following article from Angular documentation:

• https://angular.io/errors/NG0201 

Since there is no particular information regarding the configuration of the application and the TreeView component in your scenario, I could provide some general suggestions that might help in resolving the error.

Firstly, what you could verify is whether the TreeViewModule is correctly imported on your side. Below I am linking an article from our documentation that shows how to import the module in both NgModule and standalone projects:

• https://www.telerik.com/kendo-angular-ui/components/treeview/get-started/#toc-manual-setup 

Alternatively, the developer could also try updating the Kendo UI for Angular packages to the latest version in order to ensure that there are not any discrepancies between the versions of the packages, which may cause unexpected behavior like the mentioned error:

• https://www.telerik.com/kendo-angular-ui/components/installation/up-to-date/#toc-updating-to-latest-versions 

I hope this helps.

Regards,
Zornitsa
Progress Telerik