Issue when using Blazored / LocalStorage in Azure function about localstorage

[Hoshani]

googling this issue landed me here, to whomever lands here in the future: I had to simply install System.Text.Json nuget package to solve the issue.

[tripleacoder]

I get the same error in a Blazor web app, but with SessionStorage instead of LocalStorage, deployed on IIS. It asks for v. 4.0.1.2 but that version is not available so I can not use the workaround...

I have other Blazor apps, running on the same server, using the same version of SessionStorage that are working fine.

I think the error comes from
Microsoft.AspNetCore.Components or
Microsoft.AspNetCore.Components.Web:
dotnet/aspnetcore#22052

After upgrading ASP.NET Core Hosting Bundle on IIS, the error went away:
https://dotnet.microsoft.com/permalink/dotnetcore-current-windows-runtime-bundle-installer

Unhandled exception in circuit 'tlnELVghh4tJIeaayOZaV4CHGjBcxk4oeYq68qqsh3I'.

Exception:
System.IO.FileNotFoundException: Could not load file or assembly 'System.Text.Json, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
File name: 'System.Text.Json, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'
at Blazored.SessionStorage.SessionStorageService..ctor(IJSRuntime jSRuntime, IOptions1 options) at ResolveService(ILEmitResolverBuilderRuntimeContext , ServiceProviderEngineScope ) at Microsoft.AspNetCore.Components.ComponentFactory.<>c__DisplayClass5_0.<CreateInitializer>g__Initialize|2(IServiceProvider serviceProvider, IComponent component) at Microsoft.AspNetCore.Components.ComponentFactory.PerformPropertyInjection(IServiceProvider serviceProvider, IComponent instance) at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType) at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateComponent(Type componentType) at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame& frame, 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)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

[chrissainty]

Does this only happen is Azure Functions? I've never tried running a Blazor app from an Azure Function. How does that work?

I'm not sure what to suggest on this one, bit outside my knowledge. I've had very little experience with Functions.

[chrissainty]

As there has been no more feedback on this issue I'm going to close it as we can't really do anything.

[hanskcr]

Thanks Hoshani. Your suggestion solved the Blazored.LocalStorage "System.IO.FileNotFoundException: Could not load file or assembly 'System.Text.Json" issue for me.

[bvirkler]

I was getting this error too. Not in Azure Functions, just a regular Blazor web app. Strange that the nuget package doesn't pull in System.Text.Json as a dependency.