Error after Startup Blazor Web App (net 8)

Radzen.Blazor Components
1

I have following problem in my Blazor Web App (Net 8) with Version 4.2 (see below).
I receive always this error and it doesn't matter if it's a blanc Solution (new created) or an already existing Solution - converted from net 7 to 8.

I followed exactly the instructions in your "Get Started" page. But the result is still the same :confounded:

What I have tried!

  • I've cleared browser cache - more than once.
  • I've cleared Visual Studio cache
  • create Empty Blazor Web App
  • use different 5.x Radzen Version

I am using:
Microsoft Visual Studio Enterprise 2022 (64-bit) - Current Version 17.11.4
Microsoft .Net Framework Version 4.8.09037

What do I wrong - where is my mistake?!?!

crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
Unhandled exception rendering component: Cannot provide a value for property 'Service' on type 'Radzen.Blazor.RadzenDialog'. There is no registered service of type 'Radzen.DialogService'.
System.InvalidOperationException: Cannot provide a value for property 'Service' on type 'Radzen.Blazor.RadzenDialog'. There is no registered service of type 'Radzen.DialogService'.
at Microsoft.AspNetCore.Components.ComponentFactory.<>c__DisplayClass9_0.g__Initialize|1(IServiceProvider serviceProvider, IComponent component)
at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType, IComponentRenderMode callerSpecifiedRenderMode, Nullable1 parentComponentId) at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame[] frames, Int32 frameIndex, Int32 parentComponentId) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl) at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange1 oldTree, ArrayRange`1 newTree)
at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
ManagedError: One or more errors occurred. (Cannot provide a value for property 'ThemeService' on type 'Radzen.Blazor.RadzenTheme'. There is no registered service of type 'Radzen.ThemeService'.)
at Jn (c:\Temp\BlazorApp1\BlazorApp1\wwwroot_framework\https:\raw.githubusercontent.com\dotnet\runtime\08338fcaa5c9b9a8190abb99222fed12aaba956c\src\mono\wasm\runtime\marshal-to-js.ts:349:18)
at Ll (c:\Temp\BlazorApp1\BlazorApp1\wwwroot_framework\https:\raw.githubusercontent.com\dotnet\runtime\08338fcaa5c9b9a8190abb99222fed12aaba956c\src\mono\wasm\runtime\marshal-to-js.ts:306:28)
at wasm://wasm/00b21c96:wasm-function[349]:0x1f979
at wasm://wasm/00b21c96:wasm-function[245]:0x1be41
at wasm://wasm/00b21c96:wasm-function[238]:0xf00e
at wasm://wasm/00b21c96:wasm-function[306]:0x1e693
at wasm://wasm/00b21c96:wasm-function[327]:0x1ee89
at wasm://wasm/00b21c96:wasm-function[217]:0xce5e
at wasm://wasm/00b21c96:wasm-function[773]:0x44219
at e. (https://localhost:7000/_framework/dotnet.runtime.8.0.8.80cvijctdx.js:3:216298) {superStack: {…}, stack: , message: 'One or more errors occurred. (Cannot provide…ered service of type 'Radzen.ThemeService'.)', Symbol(wasm js_owned_gc_handle): 102}

2

Check our getting started - it's explicitly stated how to register and use components like Dialog, Tooltip, ContextMenu, etc.

3

Many thanks for your quick answer!!!!!!!!

Correct - Service is not part of ServiceCollection.

But where in your documentation can I find this. In Get-Started (Section - .net 8 - point six) the only service which is registered is: builder.Services.AddRadzenComponents();
That is what I have done.

Where can I find the explicit call to register the DialogService in your documentation on this page.

4

That's the documentation. You however should call that in all Program.cs files you have in your solution.

5

Hi!
Thanks for your reply!!!!! The problem was solved with this additional line of code!
Can you tell me why is this necessary and should this not be a part of your "Getting Started" documentation.
Best regards
Patrick