为什么AutoMapper在将二维数组映射到列表列表时会抛出参数exception

Question

因此，我基本上有一个模型，我想从我的API中返回，但它包含一个矩阵，恰好可以通过文本来实现。 我有这个自动应用程序配置文件，它应该可以解决问题，然后将[，]转向list＆lt; list＆lt; t＆gt;＆gt;＆gt;：

public class AutoMapperProfile : Profile
{
    public AutoMapperProfile()
    {
        CreateMap<Cell, CellDTO>()
            .ForMember(n => n.isBomb, opt => opt.MapFrom(t => t.IsBomb))
            .ForMember(n => n.isRevealed, opt => opt.MapFrom(t => t.IsRevealed))
            .ForMember(n => n.isFlaged, opt => opt.MapFrom(t => t.IsFlagged))
            .ForMember(n => n.bombCount, opt => opt.MapFrom(t => t.BombCount));

        CreateMap<BoardState, BoardStateDTO>()
            .ForMember(n => n.grid, opt => opt.MapFrom(t => _2DMatrixToListList(t.grid)))
            .ForMember(n => n.bombsLeft, opt => opt.MapFrom(t => t.BombsLeft))
            .ForMember(n => n.bombsGenerated, opt => opt.MapFrom(t => t.BombsGenerated));
    }

    private static List<List<T>> _2DMatrixToListList<T>(T[,] array)
    {
        var result = new List<List<T>>();
        var lengthX = array.GetLength(0);
        var lengthY = array.GetLength(1);

        // the reason why we get lengths of dimensions before looping through
        // is because we would like to use `List<T>(int length)` overload
        // this will prevent constant resizing of its underlying array and improve performance
        for (int i = 0; i < lengthX; i++)
        {
            var listToAdd = new List<T>(lengthY);

            for (int i2 = 0; i2 < lengthY; i2++)
            {
                listToAdd.Add(array[i, i2]);
            }

            result.Add(listToAdd);
        }

        return result;
    }
}

但是，每当我调用该方法并尝试使用该方法时config，此错误被抛出：

System.ArgumentException: Argument must be single-dimensional, zero-based array type (Parameter 'array')
   at System.Linq.Expressions.Expression.ArrayLength(Expression array)
   at AutoMapper.Execution.ExpressionBuilder.<ForEach>g__ForEachArrayItem|37_0(ParameterExpression loopVar, Expression array, Expression loopContent)
   at AutoMapper.Execution.ExpressionBuilder.ForEach(ParameterExpression loopVar, Expression collection, Expression loopContent)
   at AutoMapper.Internal.Mappers.CollectionMapper.<MapExpression>g__MapCollectionCore|2_1(Expression destExpression, <>c__DisplayClass2_0& )
   at AutoMapper.Internal.Mappers.CollectionMapper.MapExpression(IGlobalConfiguration configurationProvider, ProfileMap profileMap, MemberMap memberMap, Expression sourceExpression, Expression destExpression)
   at AutoMapper.Execution.ExpressionBuilder.MapExpression(IGlobalConfiguration configurationProvider, ProfileMap profileMap, TypePair typePair, Expression sourceParameter, MemberMap propertyMap, Expression destinationParameter)
   at AutoMapper.Execution.TypeMapPlanBuilder.MapMember(MemberMap memberMap, Expression destinationMemberValue, ParameterExpression resolvedValue)
   at AutoMapper.Execution.TypeMapPlanBuilder.CreateConstructorParameterExpression(ConstructorParameterMap ctorParamMap)
   at System.Linq.Enumerable.SelectEnumerableIterator`2.MoveNext()
   at System.Linq.Enumerable.ZipIterator[TFirst,TSecond,TResult](IEnumerable`1 first, IEnumerable`1 second, Func`3 resultSelector)+MoveNext()
   at System.Collections.Generic.LargeArrayBuilder`1.AddRange(IEnumerable`1 items)
   at System.Collections.Generic.SparseArrayBuilder`1.ReserveOrAdd(IEnumerable`1 items)
   at System.Linq.Enumerable.Concat2Iterator`1.ToArray()
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at System.Dynamic.Utils.CollectionExtensions.ToReadOnly[T](IEnumerable`1 enumerable)
   at System.Linq.Expressions.Expression.Block(IEnumerable`1 variables, IEnumerable`1 expressions)
   at AutoMapper.Execution.TypeMapPlanBuilder.ConstructorMapping(ConstructorMap constructorMap)
   at AutoMapper.Execution.TypeMapPlanBuilder.CreateNewDestinationFunc()
   at AutoMapper.Execution.TypeMapPlanBuilder.CreateDestinationFunc()
   at AutoMapper.Execution.TypeMapPlanBuilder.CreateMapperLambda(HashSet`1 typeMapsPath)
   at AutoMapper.TypeMap.Seal(IGlobalConfiguration configurationProvider, HashSet`1 typeMapsPath)
   at AutoMapper.MapperConfiguration.Seal()
   at AutoMapper.MapperConfiguration..ctor(MapperConfigurationExpression configurationExpression)
   at Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions.<>c.<AddAutoMapperClasses>b__12_2(IServiceProvider sp)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType)
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.Extensions.DependencyInjection.ServiceCollectionExtensions.<>c.<AddAutoMapperClasses>b__12_3(IServiceProvider sp)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass2_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at lambda_method36(Closure , Object , HttpContext )
   at Microsoft.AspNetCore.Http.RequestDelegateFactory.<>c__DisplayClass36_0.<Create>b__0(HttpContext httpContext)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.Invoke(HttpContext httpContext)
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

如果有人可以为我澄清这个错误，那就太好了。而且，以下是我使用的模型：

    public struct BoardState
    {
        public Cell[,] grid { get; set; }
        public byte BombsGenerated { get; set; }
        public byte BombsLeft { get; set; }
        public bool isGameOver { get; set; }
        public bool isStarted { get; set; }
    }



public record BoardStateDTO(List<List<CellDTO>> grid, byte bombsGenerated, byte bombsLeft, bool isGameOver, bool isStarted);

Answer 1

因此，如果有人需要答案，我可以给您。
我的目的是转移[，]，所以我需要串行。最后，我只是使用纽顿夫妇来做到这一点。您可以在最新的ASP.NET中手动连接它，如下所示：
到控制器：

builder.Services.AddControllers().AddNewtonsoftJson();

信号枢纽：

 builder.Services.AddSignalR().AddNewtonsoftJsonProtocol();