无法让它运行。我收到以下错误消息，我已使其尽可能简单，但我缺少所需的服务。
我使用的是图形类型第一方法。 https://graphql-dotnet.github.io/docs/getting-started/introduction
System.InvalidOperationException：在 GraphQL.Utilities.ServiceProviderExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) in / /src/GraphQL/Utilities/ServiceProviderExtensions.cs: GraphQL.Types.SchemaTypes 的第 33 行中找不到类型 fall.TestOGT 所需的服务。 <>c__DisplayClass7_0.<.ctor>b__2(Type t) in / /src/GraphQL/Types/Collections/SchemaTypes.cs:line 141 at GraphQL.Types.SchemaTypes.AddTypeIfNotRegistered(Type type, TypeCollectionContext context) in //src/ GraphQL/Types/Collections/SchemaTypes.cs: GraphQL.Types.SchemaTypes.HandleField(IComplexGraphType parentType, FieldType field, TypeCollectionContext context, Boolean applyNameConverter) in / 的第 539 行/src/GraphQL/Types/Collections/SchemaTypes.cs: GraphQL.Types.SchemaTypes.AddType(IGraphType type, TypeCollectionContext context) 的第 429 行//src/GraphQL/Types/Collections/SchemaTypes.cs: GraphQL 的第 333 行。 Types.SchemaTypes..ctor(ISchema schema, IServiceProvider serviceProvider) in / /src/GraphQL/Types/Collections/SchemaTypes.cs:line 154 at GraphQL.Types.Schema.CreateSchemaTypes() in / /src/GraphQL/Types/Schema .cs: GraphQL.Types.Schema.Initialize() 的第 328 行 in / /src/GraphQL/Types/Schema.cs: GraphQL.Utilities.SchemaPrinter.PrintFilteredSchema(Func
2 directiveFilter, Func2 typeFilter) in / /src/GraphQL/的第 102 行Utilities/SchemaPrinter.cs：GraphQL.Utilities.SchemaPrinter.Print() 中的第 79 行 //src/GraphQL/Utilities/SchemaPrinter.cs：位于 C:\ws\Autumn-APICore\Autumn.Api\Controllers\AutumnController.cs：Autumn.Api.Controllers.AutumnController.Schema() 的第 63 行：Microsoft 的第 37 行。 AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute（IActionResultTypeMapper 映射器，ObjectMethodExecutor 执行器，对象控制器，Object[] 参数）
using GraphQL.Types;
using System;
namespace autumn
{
public class Test
{
public int Number { get; set; } = 5;
public string String { get; set; } = "Test Class";
public DateTime DateTime { get; set; } = System.DateTime.Now;
}
public class TestOGT : ObjectGraphType<Test>
{
public TestOGT()
{
Field(x => x.Number, nullable: true).Name("Number");
Field(x => x.String, nullable: true).Name("String");
Field(x => x.DateTime, nullable: true).Name("DateTime");
}
}
public class AutumnQuery : ObjectGraphType
{
public AutumnQuery()
{
Field<TestOGT>("Article",
arguments: new QueryArguments(
new QueryArgument<StringGraphType> { Name = "Language", DefaultValue="en-us" },
new QueryArgument<StringGraphType> { Name = "Id" }
),
resolve: context => { return new Test(); });
}
}
public class AutumnSchema : Schema
{
public AutumnSchema(IServiceProvider serviceProvider, AutumnQuery query) : base(serviceProvider)
{
this.Query = query;
}
}
[ApiController]
[Route("[controller]")]
public class AutumnController : ControllerBase
{
private static readonly HttpClient client = new HttpClient();
private readonly AutumnSchema _schema;
public AutumnController(ISchema schema)
{
_schema = (AutumnSchema)schema;
}
[HttpGet]
[Route("/schema")]
public async Task<IActionResult> Schema()
{
return Content(new SchemaPrinter(_schema).Print());
}
}
}