I have not been able to complete this module

Brandon Shaw 20

I did everything exactly as this article states and cannot get this code to run correctly. I have troubleshooted with co pilot and git hub. I'm new to programming so I'm sure there is a knowledge gap that I just can't seem to reconcile.

I will hold on to the project incase you want more specifics, but I just wanted you to know how much I struggled with this module.

This question is related to the following Learning Module

Pradeep M 5,680 Reputation points Microsoft Vendor

2025-02-04T10:02:45.9933333+00:00

Hi Brandon Shaw,

Could you please provide the error along with the screenshots for reference.
Brandon Shaw 20 Reputation points

2025-02-04T10:18:09.6866667+00:00

I didn't mean to answer

Brandon Shaw 20

Please let me know how I can give you more context. I have attached screenshots of the web page that comes up when I run the program and of the developer's console. Here's the output in my terminal:

Building...

info: Microsoft.Hosting.Lifetime[14]

  Now listening on: http://localhost:5000

info: Microsoft.Hosting.Lifetime[0]

  Application started. Press Ctrl+C to shut down.

info: Microsoft.Hosting.Lifetime[0]

  Hosting environment: Development

info: Microsoft.Hosting.Lifetime[0]

  Content root path: C:\Users\crazz\Desktop\Coding\BlazingPizza\

info: Microsoft.Hosting.Lifetime[0]

  Application is shutting down...

PS C:\Users\crazz\Desktop\Coding\BlazingPizza> dotnet watch

dotnet watch 🔥 Hot reload enabled. For a list of supported edits, see https://aka.ms/dotnet/hot-reload.

💡 Press "Ctrl + R" to restart.

Using launch settings from C:\Users\crazz\Desktop\Coding\BlazingPizza\Properties\launchSettings.json...

Building...

info: Microsoft.Hosting.Lifetime[14]

  Now listening on: http://localhost:5000

info: Microsoft.Hosting.Lifetime[0]

  Application started. Press Ctrl+C to shut down.

info: Microsoft.Hosting.Lifetime[0]

  Hosting environment: Development

info: Microsoft.Hosting.Lifetime[0]

  Content root path: C:\Users\crazz\Desktop\Coding\BlazingPizza\

info: System.Net.Http.HttpClient.Default.LogicalHandler[100]

  Start processing HTTP request GET http://localhost:5000/specials

info: System.Net.Http.HttpClient.Default.ClientHandler[100]

  Sending HTTP request GET http://localhost:5000/specials

info: System.Net.Http.HttpClient.Default.ClientHandler[101]

  Received HTTP response headers after 417.2056ms - 200

info: System.Net.Http.HttpClient.Default.LogicalHandler[101]

  End processing HTTP request after 454.4547ms - 200

fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]

  An unhandled exception has occurred while executing the request.

  System.Text.Json.JsonException: '<' is an invalid start of a value. Path: $ | LineNumber: 1 | BytePositionInLine: 0.

   ---> System.Text.Json.JsonReaderException: '<' is an invalid start of a value. LineNumber: 1 | BytePositionInLine: 0.

     at System.Text.Json.ThrowHelper.ThrowJsonReaderException(Utf8JsonReader& json, ExceptionResource resource, Byte nextByte, ReadOnlySpan`1 bytes)

     at System.Text.Json.Utf8JsonReader.ConsumeValue(Byte marker)

     at System.Text.Json.Utf8JsonReader.ReadFirstToken(Byte first)

     at System.Text.Json.Utf8JsonReader.ReadSingleSegment()

     at System.Text.Json.Utf8JsonReader.Read()

     at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)

     --- End of inner exception stack trace ---

     at System.Text.Json.ThrowHelper.ReThrowWithPath(ReadStack& state, JsonReaderException ex)

     at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)

     at System.Text.Json.JsonSerializer.ReadCore[TValue](JsonConverter jsonConverter, Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)

     at System.Text.Json.JsonSerializer.ReadCore[TValue](JsonReaderState& readerState, Boolean isFinalBlock, ReadOnlySpan`1 buffer, JsonSerializerOptions options, ReadStack& state, JsonConverter converterBase)

     at System.Text.Json.JsonSerializer.ContinueDeserialize[TValue](ReadBufferState& bufferState, JsonReaderState& jsonReaderState, ReadStack& readStack, JsonConverter converter, JsonSerializerOptions options)

     at System.Text.Json.JsonSerializer.ReadAllAsync[TValue](Stream utf8Json, JsonTypeInfo jsonTypeInfo, CancellationToken cancellationToken)

     at System.Net.Http.Json.HttpContentJsonExtensions.ReadFromJsonAsyncCore[T](HttpContent content, Encoding sourceEncoding, JsonSerializerOptions options, CancellationToken cancellationToken)

     at System.Net.Http.Json.HttpClientJsonExtensions.GetFromJsonAsyncCore[T](Task`1 taskResponse, JsonSerializerOptions options, CancellationToken cancellationToken)

     at BlazingPizza.Pages.Index.OnInitializedAsync() in C:\Users\crazz\Desktop\Coding\BlazingPizza\Pages\Index.razor:line 29    

     at Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync()

     at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)

     at Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.HandleException(Exception exception)

     at Microsoft.AspNetCore.Components.RenderTree.Renderer.HandleExceptionViaErrorBoundary(Exception error, ComponentState errorSourceOrNull)

     at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)

     at Microsoft.AspNetCore.Components.RenderTree.Renderer.<WaitForQuiescence>g__ProcessAsynchronousWork|43_0()

     at Microsoft.AspNetCore.Components.RenderTree.Renderer.WaitForQuiescence()

     at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderRootComponentAsync(Int32 componentId, ParameterView initialParameters)

     at Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.CreateInitialRenderAsync(Type componentType, ParameterView initialParameters)

     at Microsoft.AspNetCore.Components.Rendering.HtmlRenderer.RenderComponentAsync(Type componentType, ParameterView initialParameters)

     at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<>c__11`1.<<InvokeAsync>b__11_0>d.MoveNext()    

  --- End of stack trace from previous location ---

     at Microsoft.AspNetCore.Mvc.ViewFeatures.StaticComponentRenderer.PrerenderComponentAsync(ParameterView parameters, HttpContext httpContext, Type componentType)

     at Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.PrerenderedServerComponentAsync(HttpContext context, ServerComponentInvocationSequence invocationId, Type type, ParameterView parametersCollection)

     at Microsoft.AspNetCore.Mvc.ViewFeatures.ComponentRenderer.RenderComponentAsync(ViewContext viewContext, Type componentType, RenderMode renderMode, Object parameters)

     at Microsoft.AspNetCore.Mvc.TagHelpers.ComponentTagHelper.ProcessAsync(TagHelperContext context, TagHelperOutput output)    

     at Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperRunner.<RunAsync>g__Awaited|0_0(Task task, TagHelperExecutionContext executionContext, Int32 i, Int32 count)

     at BlazingPizza.Pages.Pages__Host.<ExecuteAsync>b__12_1()

     at Microsoft.AspNetCore.Razor.Runtime.TagHelpers.TagHelperExecutionContext.SetOutputContentAsync()

     at BlazingPizza.Pages.Pages__Host.ExecuteAsync()

     at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)

     at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts) 

     at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)

     at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, String contentType, Nullable`1 statusCode)

     at Microsoft.AspNetCore.Mvc.ViewFeatures.ViewExecutor.ExecuteAsync(ViewContext viewContext, String contentType, Nullable`1 statusCode)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|30_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeResultFilters>g__Awaited|28_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)

     at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)

     at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)

     at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Learn Blazor Issue.pdf

Pradeep M 5,680 Reputation points Microsoft Vendor

2025-02-06T03:48:56.0633333+00:00

Hi Brandon Shaw,

I'm following up to see if you've had a chance to review my previous response. If it was helpful, please let me know by accepting the answer and upvoting it. Feel free to reach out if you encounter any issues.

Thank you.

Accepted answer

Pradeep M 5,680 Reputation points Microsoft Vendor

2025-02-05T09:58:43.0666667+00:00

Hi Brandon Shaw,

Thank you for reaching out to Microsoft Q & A forum.

It seems like the issue is with the API returning invalid data. First, check if http://localhost:5000/specials returns valid JSON in the browser or Postman. Ensure routing is properly configured, especially the app.MapControllerRoute in Program.cs. Confirm that SeedData.Initialize() is working to populate your database. Review the OnInitializedAsync() method for correct HTTP request handling and JSON deserialization.

Please feel free to contact us if you have any additional questions.

If you have found the answer provided to be helpful, please click on the "Accept answer/Upvote" button so that it is useful for other members in the Microsoft Q&A community.
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Brandon Shaw 20 Reputation points

2025-02-06T05:31:56.28+00:00

It turns out I was missing the app.MapControllerRoute instruction. Although I know I entered it before, that was the issue this time around.

Funny enough the image for cheese pizza won't show up and there is nothing I can do to get it to show up. I'm wondering if it raised some kind of flag with the browser or my ISP to where it won't show. It would be easy to conceive considering what cheese pizza is code for.

Thanks for your help. Sorry for the trouble.

Pradeep M 5,680 Reputation points Microsoft Vendor

2025-02-07T04:03:01.87+00:00

Hi Brandon Shaw,

Glad to hear that your issue got resolved. Please don't hesitate to reach out to us if you have any further queries.
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