An unhandled exception of type 'System.AggregateException' occurred in Microsoft.Extensions.DependencyInjection.dll:

[santoshpatro]

Need your help for the question posted at :

https://stackoverflow.com/questions/59470494/an-unhandled-exception-of-type-system-aggregateexception-occurred-in-microsoft

[RehanSaeed]

Are you getting this error from this project when you do dotnet new graphql or after editing a fresh template? The key to the error is:

Some services are not able to be constructed

The exception should tell you which service it is failing to construct.

[RehanSaeed]

Feel free to re-open if you have more info.

[santoshpatro]

Thanks Rehan for your response. I have installed .NET Core 3.1 in my system including the new templates available for Dotnet-Boxed.

Here goes my code details:

Program.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

namespace Sample.API
{
    public class Program
    {
        public static void Main(string[] args)
        {
            // Use the W3C Trace Context format to propagate distributed trace identifiers.
            // See https://devblogs.microsoft.com/aspnet/improvements-in-net-core-3-0-for-troubleshooting-and-monitoring-distributed-apps/
            Activity.DefaultIdFormat = ActivityIdFormat.W3C;
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) => 
            Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseKestrel(options => options.AddServerHeader = false);
                webBuilder.UseStartup<Startup>();
            });
    }
}

Startup.cs

using Sample.API.Constants;
using Sample.API.Extensions;
using Sample.API.GraphQL;
using Sample.API.Middleware;
using Boxed.AspNetCore;
using GraphQL.Server;
using GraphQL.Server.Ui.Playground;
using GraphQL.Server.Ui.Voyager;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Diagnostics.HealthChecks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

namespace Sample.API
{
    public class Startup
    {
        private readonly IConfiguration configuration;
        private readonly IWebHostEnvironment webHostEnvironment;
        /// <summary>
        /// Initializes a new instance of the <see cref = "Startup"/> class.
        /// </summary>
        /// <param name = "configuration">The application configuration, where key value pair settings are stored. See
        /// http://docs.asp.net/en/latest/fundamentals/configuration.html</param>
        /// <param name = "webHostEnvironment">The environment the application is running under. This can be Development,
        /// Staging or Production by default. See http://docs.asp.net/en/latest/fundamentals/environments.html</param>
        public Startup(IConfiguration configuration, IWebHostEnvironment webHostEnvironment)
        {
            this.configuration = configuration;
            this.webHostEnvironment = webHostEnvironment;
        }

        /// <summary>
        /// Configures the services to add to the ASP.NET Core Injection of Control (IoC) container. This method gets
        /// called by the ASP.NET runtime. See
        /// http://blogs.msdn.com/b/webdev/archive/2014/06/17/dependency-injection-in-asp-net-vnext.aspx
        /// </summary>
        public virtual void ConfigureServices(IServiceCollection services) => 
            services
            .AddCosmosDBConfiguration(configuration)
            .AddAutoMapperConfiguration()
            .AddCustomResponseCompression(configuration)
            .AddCustomCors()
            .AddCustomOptions(configuration)
            .AddHttpContextAccessor()
            .AddCustomRouting()
            .AddCustomStrictTransportSecurity()
            .AddCustomHealthChecks()
            .AddServerTiming()
            .AddControllers()
               .AddCustomJsonOptions(webHostEnvironment)
               .AddCustomMvcOptions(configuration)
            .Services
            .AddCustomGraphQL(configuration, webHostEnvironment)
            .AddGraphQLResolvers()
            .AddGraphQLResponse()
            .AddProjectRepositories()
            .AddProjectSchemas();

        /// <summary>
        /// Configures the application and HTTP request pipeline. Configure is called after ConfigureServices is
        /// called by the ASP.NET runtime.
        /// </summary>
        public virtual void Configure(IApplicationBuilder application) =>
            application
                .UseIf(
                    this.webHostEnvironment.IsDevelopment(),
                    x => x.UseServerTiming())
            .UseForwardedHeaders()
            .UseResponseCompression()
            .UseFetchLocaleMiddleware()
            .UseIf(
                    !this.webHostEnvironment.IsDevelopment(),
                    x => x.UseHsts())
                .UseIf(
                    this.webHostEnvironment.IsDevelopment(),
                    x => x.UseDeveloperExceptionPage())
            .UseRouting()
                .UseCors(CorsPolicyName.AllowAny)
            .UseEndpoints(
                    builder =>
                    {
                        builder
                            .MapHealthChecks("/status")
                            .RequireCors(CorsPolicyName.AllowAny);
                        builder
                            .MapHealthChecks("/status/self", new HealthCheckOptions() { Predicate = _ => false })
                            .RequireCors(CorsPolicyName.AllowAny);
                    })
            .UseWebSockets()
                // Use the GraphQL subscriptions in the specified schema and make them available at /graphql.
                .UseGraphQLWebSockets<MainSchema>()
                // Use the specified GraphQL schema and make them available at /graphql.
                .UseGraphQL<MainSchema>()
                .UseIf(
                    this.webHostEnvironment.IsDevelopment(),
                    x => x
                        // Add the GraphQL Playground UI to try out the GraphQL API at /.
                        .UseGraphQLPlayground(new GraphQLPlaygroundOptions() { Path = "/" })
                        // Add the GraphQL Voyager UI to let you navigate your GraphQL API as a spider graph at /voyager.
                        .UseGraphQLVoyager(new GraphQLVoyagerOptions() { Path = "/voyager" }));
    }
}

I followed the guidelines of Templates mentioned at: https://github.com/Dotnet-Boxed/Templates/blob/master/Docs/GraphQL.md

Based on the above I created a POC which works fine but not the above mentioned code.

Can you please help me to fix this issue by providing your guidance

Thanks,
Santosh

[santoshpatro]

Hi Rehan,

I tried to re-open the above issue but it seems I don't have sufficient privilege to reopen it.

The exact setup works fine with .NET Core 2.2.

I am not sure what is the issue post upgrade to .NET Core 3.1

As mentioned in the above, I have detailed the Startup.cs and Program.cs in details.

Any help on this is much appreciated.

Thanks,
Santosh

[RehanSaeed]

It's not clear from the code you posted.

I would advise the creation of a small sample project that you can commit to GitHub. Then link it in your StackOverflow.

[santoshpatro]

I just tried a sample with your template and found the issue. I have posted the question with all the details now. Any help on this is much appreciated. Awaiting your response.

…

On Thu, Jan 2, 2020 at 1:57 PM Muhammad Rehan Saeed < ***@***.***> wrote: It's not clear from the code you posted. I would advise the creation of a small sample project that you can commit to GitHub. Then link it in your StackOverflow. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <https://github.com/Dotnet-Boxed/Templates/issues/484?email_source=notifications&email_token=AAZJTFDPA5T3X4NYMGFM5OTQ3WQNRA5CNFSM4J667SU2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEH53FHA#issuecomment-570143388>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAZJTFB7VFFJYLOD3WG3XPTQ3WQNRANCNFSM4J667SUQ> .

[RehanSaeed]

Just tried the latest version of the template and it works fine.