Warnings while running server-side ASP.NET Core Blazor sample

[Florian]

Hi,

I just followed your getting started guide (https://ej2.syncfusion.com/aspnet-core-blazor/documentation/getting-started/vs-blazor-server/) to get my first web app up and running with your components. The website will be loaded, but as soon as I try to change the view, the following warnings will be displayed in console:

warn: Microsoft.AspNetCore.Components.Browser.Rendering.RemoteRenderer[100]

      Unhandled exception rendering component: Method not found: 'Void Microsoft.JSInterop.DotNetObjectRef..ctor(System.Object)'.

System.MissingMethodException: Method not found: 'Void Microsoft.JSInterop.DotNetObjectRef..ctor(System.Object)'.

   at Syncfusion.EJ2.RazorComponents.BaseComponent.Dispose()

   at Microsoft.AspNetCore.Components.Rendering.ComponentState.DisposeInBatch(RenderBatchBuilder batchBuilder)

   at Microsoft.AspNetCore.Components.Rendering.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)

   at Microsoft.AspNetCore.Components.Rendering.Renderer.ProcessRenderQueue()

warn: Microsoft.AspNetCore.Components.Server.ComponentHub[0]

      Unhandled Server-Side exception

System.MissingMethodException: Method not found: 'Void Microsoft.JSInterop.DotNetObjectRef..ctor(System.Object)'.

   at Syncfusion.EJ2.RazorComponents.BaseComponent.Dispose()

   at Microsoft.AspNetCore.Components.Rendering.ComponentState.DisposeInBatch(RenderBatchBuilder batchBuilder)

   at Microsoft.AspNetCore.Components.Rendering.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)

   at Microsoft.AspNetCore.Components.Rendering.Renderer.ProcessRenderQueue()

I'm sure I did all steps correctly what mentioned in your getting started document. I'm also using the latest version of VS 2019 preview along with .NET CORE 3.0 Preview4 and the latest Syncfusion.EJ2.RazorComponents library.

I've attached my sample web app to this post. Thank you in advance for your support.

Best regards,

Florian

Attachment: WebApplication1_4fd291c6.zip

[Moshe Habas]

In my case it disables the components

Nothing works from preview-6 update

[Florian]

I was wrong: I've installed the very latest version of .NET CORE 3.0:

[Vijayanand S]

Hi Florian/Moshe,

 

Since Microsoft has introduced the breaking changes in the Preview 6 update, our controls have issues in this version. We are working on providing the compatibility to the latest version and will release it on or before 19^th June 2019.

 

https://github.com/aspnet/Announcements/issues/364

 

• DotNetObjectRef is replaced by a generic DotNetObjectRef<T> that is required for both sending and receiving a managed object reference when doing interop with the browser

 

Until then, I would advise you to use our components in the preview 5. Please let me know if you have any questions.

 

Regards,

Vijay

[Vijayanand S]

Hi Floarian, 

We have published the new package which is compatible with the .NET Core v3.0.0-preview6. Please get the latest NuGet package from the location below. 

NuGet location: https://www.nuget.org/packages/Syncfusion.EJ2.AspNet.Core.RazorComponents/17.1.0.52-beta 

Release Notes: https://ej2.syncfusion.com/aspnet-core-blazor/documentation/release-notes/17.1.52/ 

Regards, 

Vijay