C# 无法转换Linq表达式错误实体框架核心3

我在做一个项目，在数据访问方面遇到了一些问题。我使用EF核心，我有这些堆栈跟踪

执行的第一个代码

publicstaticvoidmain（）{
EntityServiceBase manager=new EntityServiceBase（new EFProductDal（））；//用于访问数据库的EFProductDal
产品结果=manager.GetByPrimaryKey（5）；
}

执行第二个文件代码 在代码中，IEntity是一个确定数据库对象的空接口
IENTITYREPORTIORY具有访问数据库的EF代码，该代码显示在“归属”的第三个代码部分中
PrimaryKeyComparable具有compare func来检查对象的主键是否等于给定的键

using System;
using System.Collections.Generic;
using ECommercial.Core.DataAccess;
using ECommercial.Core.Entities;

namespace ECommercial.Core.Business
{
    public abstract class EntityServiceBase<TEntity> : IService<TEntity> 
        where TEntity :class,IEntity, new() // IENTITY IS AN EMPTY INTERFACE TO JUST DETERMINE DATABASE ENTITIES
    {
        private IEntityRepository<TEntity> _entityRepository;

        public EntityServiceBase(IEntityRepository<TEntity> entityRepository)
        {
            _entityRepository = entityRepository;
        }

        public TEntity GetByPrimaryKey(Object key)
        {
            PrimaryKeyComparable primaryKeyComparable = new PrimaryKeyComparable();
            return _entityRepository.Get(o=>primaryKeyComparable.comparePrimaryKey<TEntity>(o,key));
        }
    }
}

使用系统；
使用System.Collections.Generic；
使用ECommercial.Core.DataAccess；
使用电子商务.Core.Entities；
命名空间ECommercial.Core.Business
{
公共抽象类EntityServiceBase:IService
其中tenty:class，ienty，new（）//ienty是一个空接口，仅用于确定数据库实体
{
私营企业报告机构(实体报告机构);；
公共实体服务库（entityRepository entityRepository）
{
_entityRepository=entityRepository；
}
公共密钥GetByPrimaryKey（对象密钥）
{
PrimaryKeyCompariable PrimaryKeyCompariable=新PrimaryKeyCompariable（）；
return _entityRepository.Get（o=>primaryKeyComparable.comparePrimaryKey（o，key））；
}
}
}

执行的第三代码部分 在代码上下文中是EF dbcontext
filter是给定的filter，它是o=>primaryKeyComparable.comparePrimaryKey（o，key）第二个代码文件。该错误发生在.SingleOrDefault（筛选器）部分。如果我删除它，该功能将正常工作。

public TEntity Get(Expression<Func<TEntity, bool>> filter)
        {
            using (var context=new TContext()){
                TEntity result = context.Set<TEntity>().SingleOrDefault(filter);
                return result;
            }
        }

public TEntity Get（表达式过滤器）
{
使用（var context=new TContext（））{
TEntity result=context.Set（）.SingleOrDefault（过滤器）；
返回结果；
}
}

ComparePrimaryKey函数

public bool comparePrimaryKey（tenty实体，对象值）
其中tenty:class、ienty、new（）
{
类型entityType=typeof（tenty）；
FieldInfo[]fields=entityType.GetFields（）；
FieldInfo found=null；
foreach（字段中的变量字段）{
Attribute Attribute=field.GetCustomAttribute（typeof（PrimaryKeyFieldAttribute））；
if（属性！=null）{
发现=字段；
打破
}
}
如果（找到！=null）{
Type foundDeclaringType=found.DeclaringType；
Type valueDeclaringType=value.GetType（）.DeclaringType；
如果（（foundDeclaringType.IsSubclassOf（valueDeclaringType））| | valueDeclaringType.IsSubclassOf（foundDeclaringType）| | valueDeclaringType==foundDeclaringType）
{
返回实体。等于（值）；
}
抛出新的InvalidCastException（“给定实体的主键必须具有相同的或与子基相关的声明类型，并比较键对象”）；
}
抛出新的CustomAttributeFormException（“实体具有任何具有PrimaryKeyFieldAttribute属性的字段。必须是PrimaryKeyAttribute（主键字段上的PrimaryKeyAttribute））；
}

错误信息（我认为英语部分足以理解） 第三个文件的.SingleOrDefault（筛选器）部分出错

Exception has occurred: CLR/System.InvalidOperationException
'System.InvalidOperationException' türünde özel durum Microsoft.EntityFrameworkCore.dll öğesinde oluştu, fakat kullanıcı kodunda işlenmedi: 'The LINQ expression 'DbSet<Product>
    .Where(p => new PrimaryKeyComparable().comparePrimaryKey<Product>(
        entity: p, 
        value: __key_0))' could not be translated. Either rewrite the query in a form that can be translated, or switch to client evaluation explicitly by inserting a call to either AsEnumerable(), AsAsyncEnumerable(), ToList(), or ToListAsync(). See https://go.microsoft.com/fwlink/?linkid=2101038 for more information.'
   konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.<VisitMethodCall>g__CheckTranslated|8_0(ShapedQueryExpression translated, <>c__DisplayClass8_0& )
   konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   konum System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   konum System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   konum Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult](Expression query)
   konum Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](Expression query, Boolean async)
   konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async)
   konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass9_0`1.<Execute>b__0()
   konum Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
   konum Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
   konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
   konum Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
   konum System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source, Expression`1 predicate)
   konum ECommercial.Core.DataAccess.EntitiyFramework.EFIEntityRepositoryBase`2.Get(Expression`1 filter) C:\Users\nihaSWin\Desktop\ECommercial\ECommercial.Core\DataAccess\EntitiyFramework\EFIEntityRepositoryBase.cs içinde: 36. satır
   konum ECommercial.Core.Business.EntityServiceBase`1.GetByPrimaryKey(Object key) C:\Users\nihaSWin\Desktop\ECommercial\ECommercial.Core\Business\EntityServiceBase.cs içinde: 26. satır
   konum ECommercial.MVC.Startup..ctor(IConfiguration configuration) C:\Users\nihaSWin\Desktop\ECommercial\ECommercial.MVC\Startup.cs içinde: 19. satır

发生异常：CLR/System.InvalidOperationException “系统无效运行例外”türündeözel durum Microsoft.EntityFrameworkCore.dllöesinde oluştu，fakat kullanıcıkodunda işlenmedi:“LINQ表达式”DbSet .Where（p=>new PrimaryKeyComparable（）.comparePrimaryKey( 实体：p， 无法转换值：_键（0））'。以可以翻译的形式重写查询，或者通过插入对AsEnumerable（）、AsAsAsAsyncEnumerable（）、ToList（）或ToListSync（）的调用显式切换到客户端计算。看见https://go.microsoft.com/fwlink/?linkid=2101038 了解更多信息。” konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslationExpressionVisitor.g_uCheckTranslated|8_0（ShapedQueryExpression translated，c_uDisplayClass8_0&） konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslationExpressionVisitor.VisitMethodCall调用（MethodCallExpression MethodCallExpression） konum Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslationExpressionVisitor.VisitMethodCall调用（MethodCallExpression MethodCallExpression） konum System.Linq.Expressions.MethodCallExpression.Accept（ExpressionVisitor） konum System.Linq.Expressions.ExpressionVisitor.Visite（表达式节点） konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslationExpressionVisitor.VisitMethodCall调用（MethodCallExpression MethodCallExpression） konum Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslationExpressionVisitor.VisitMethodCall调用（MethodCallExpression MethodCallExpression） konum System.Linq.Expressions.MethodCallExpression.Accept（ExpressionVisitor） konum System.Linq.Expressions.ExpressionVisitor.Visite（表达式节点） konum Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult]（表达式查询） konum Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult]（表达式查询，布尔异步） konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult]（IDatabase数据库、表达式查询、IModel模型、布尔异步） konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.c__DisplayClass9_0`1.b__0（） konum Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOradQueryCore[TFunc]（对象缓存键，Func`1编译器） konum Microsoft.EntityFrameworkCore.Query.Internal.CompiledQ

public bool comparePrimaryKey<TEntity>(TEntity entity,Object value)
            where TEntity:class,IEntity,new()
        {
            Type entityType = typeof(TEntity);
            FieldInfo[] fields = entityType.GetFields();
            FieldInfo found =null;
            foreach(var field in fields){
                Attribute attribute=field.GetCustomAttribute(typeof(PrimaryKeyFieldAttribute));
                if(attribute!=null){
                    found=field;
                    break;
                }
            }
            if(found!=null){
                Type foundDeclaringType= found.DeclaringType;
                Type valueDeclaringType = value.GetType().DeclaringType;
                if((foundDeclaringType.IsSubclassOf(valueDeclaringType)) ||valueDeclaringType.IsSubclassOf(foundDeclaringType) || valueDeclaringType==foundDeclaringType)
                {
                    return entity.Equals(value);
                }
                throw new InvalidCastException("Given entity's primary key must have same or child-base related declaration type with key object compared");
            }
            throw new CustomAttributeFormatException("The Entity Has Any field has PrimaryKeyFieldAttribute attribute. Must be PrimaryKeyAttribute on primary key field.");
        }

Exception has occurred: CLR/System.InvalidOperationException
'System.InvalidOperationException' türünde özel durum Microsoft.EntityFrameworkCore.dll öğesinde oluştu, fakat kullanıcı kodunda işlenmedi: 'The LINQ expression 'DbSet<Product>
    .Where(p => new PrimaryKeyComparable().comparePrimaryKey<Product>(
        entity: p, 
        value: __key_0))' could not be translated. Either rewrite the query in a form that can be translated, or switch to client evaluation explicitly by inserting a call to either AsEnumerable(), AsAsyncEnumerable(), ToList(), or ToListAsync(). See https://go.microsoft.com/fwlink/?linkid=2101038 for more information.'
   konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.<VisitMethodCall>g__CheckTranslated|8_0(ShapedQueryExpression translated, <>c__DisplayClass8_0& )
   konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   konum System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   konum Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   konum System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   konum System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   konum Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult](Expression query)
   konum Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](Expression query, Boolean async)
   konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async)
   konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass9_0`1.<Execute>b__0()
   konum Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
   konum Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
   konum Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
   konum Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
   konum System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source, Expression`1 predicate)
   konum ECommercial.Core.DataAccess.EntitiyFramework.EFIEntityRepositoryBase`2.Get(Expression`1 filter) C:\Users\nihaSWin\Desktop\ECommercial\ECommercial.Core\DataAccess\EntitiyFramework\EFIEntityRepositoryBase.cs içinde: 36. satır
   konum ECommercial.Core.Business.EntityServiceBase`1.GetByPrimaryKey(Object key) C:\Users\nihaSWin\Desktop\ECommercial\ECommercial.Core\Business\EntityServiceBase.cs içinde: 26. satır
   konum ECommercial.MVC.Startup..ctor(IConfiguration configuration) C:\Users\nihaSWin\Desktop\ECommercial\ECommercial.MVC\Startup.cs içinde: 19. satır