Entity Framework ConceptualModels 开始标记与结束标记不匹配

Question

我正在从 Visual Studio 2017 迁移到 Visual Studio 2022，并收到有关“值不能为空。参数名称：类型”的 EF 错误，因此我将实体框架 6.2.0 更新为 EF 6.4.4。现在我收到此错误，表示

ConceptualModels

标签不匹配（当尝试更新我的数据库时）。我如何检查我的

ConceptualModels

并解决此问题？

（CodeFirst 项目）

错误：

  at System.Xml.XmlTextReaderImpl.ParseElementContent()
   at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r)
   at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r, LoadOptions o)
   at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)
   at System.Xml.Linq.XDocument.Load(Stream stream, LoadOptions options)
   at System.Data.Entity.Migrations.Edm.ModelCompressor.Decompress(Byte[] bytes)
   at System.Data.Entity.Migrations.DbMigration.GetModel(Func`2 modelAccessor)
   at System.Data.Entity.Migrations.DbMigrator.ApplyMigration(DbMigration migration, DbMigration lastMigration)
   at System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.ApplyMigration(DbMigration migration, DbMigration lastMigration)
   at System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
   at System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
   at System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String targetMigration)
   at System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
   at System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)
   at System.Data.Entity.Infrastructure.Design.Executor.Update.<>c__DisplayClass0_0.<.ctor>b__0()
   at System.Data.Entity.Infrastructure.Design.Executor.OperationBase.Execute(Action action)
The 'ConceptualModels' start tag on line 4 position 6 does not match the end tag of 'ConceptualModessociationSet'. Line 1747, position 7.

我的数据库上下文：

namespace GMM.Repository.Context
{
    public class GMMDbContext : IdentityDbContext<ApplicationUser, AppRole, string, IdentityUserLogin, IdentityUserRole, IdentityUserClaim>
    {
        public static string ConnectionString { get; set; }
        static GMMDbContext()
        {
#if DEBUG
            ConnectionString = "GMMConnection";
#endif
        }
        public static GMMDbContext Create()
        {
            return new GMMDbContext();
        }

        public GMMDbContext()
            : base(ConnectionString)             
        {
            Database.SetInitializer(new MigrateDatabaseToLatestVersion<GMMDbContext, GMM.Repository.Migrations.Configuration>());
            DbInterception.Add(new FtsInterceptor());
        }

        #region AccessControl
        public IDbSet<GroupRole> GroupRoles { get; set; }
        public IDbSet<RoleGroup> RoleGroups { get; set; }
        public IDbSet<UserRoleGroup> UserRoleGroups { get; set; }
        #endregion

        #region BaseInformation
        public IDbSet<Department> Departments { get; set; }
        #endregion

 

        #region General
        public IDbSet<Location> Locations { get; set; }

        public IDbSet<Setting> Settings { get; set; }
  
        #endregion

     



        public int SaveChanges(string currentUserIp)
        {
            AddTimestamps(currentUserIp);
            return base.SaveChanges();
        }

        public Task<int> SaveChangesAsync(string userIp)
        {
            AddTimestamps(userIp);
            return base.SaveChangesAsync();
        }

        public override int SaveChanges()
        {
            AddTimestamps();
            return base.SaveChanges();
        }

        private void AddTimestamps(string currentUserId, string currentUserIp)
        {
            if (currentUserId == null)
            {
                throw new NullReferenceException("CurrentUserId");
            }

            var entities = ChangeTracker.Entries().Where(x => x.Entity is IBaseEntity && (x.State == EntityState.Added || x.State == EntityState.Modified));
            foreach (var entity in entities)
            {
                if (entity.State == EntityState.Added)
                {
                    ((BaseGuidEntity)entity.Entity).DateCreated = DateTime.Now;
                    ((BaseGuidEntity)entity.Entity).CreatedBy_Id = currentUserId;
                    ((BaseGuidEntity)entity.Entity).CreatedByIp = currentUserIp;
                }

                ((BaseGuidEntity)entity.Entity).DateModified = DateTime.Now;
                ((BaseGuidEntity)entity.Entity).ModifiedBy_Id = currentUserId;
                ((BaseGuidEntity)entity.Entity).ModifiedByIp = currentUserIp;
            }
        }

        private void AddTimestamps()
        {
            var entities = ChangeTracker.Entries().Where(x => x.Entity is IBaseEntity && (x.State == EntityState.Added || x.State == EntityState.Modified));
            foreach (var entity in entities)
            {
                if (entity.State == EntityState.Added)
                {
                    ((BaseGuidEntity)entity.Entity).DateCreated = DateTime.UtcNow;

                }
                ((BaseGuidEntity)entity.Entity).DateModified = DateTime.UtcNow;
            }
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();

            #region Message
            modelBuilder.Configurations.Add(new PrivacyConfig());
            modelBuilder.Configurations.Add(new ResultConfig());
            modelBuilder.Configurations.Add(new SubjectConfig());
            modelBuilder.Configurations.Add(new PriorityConfig());
            modelBuilder.Configurations.Add(new CategoryConfig());
            modelBuilder.Configurations.Add(new MessageConfig());
            modelBuilder.Configurations.Add(new MessageFeedbackConfig());
            modelBuilder.Configurations.Add(new ReferConfig());
            #endregion

            base.OnModelCreating(modelBuilder);
        }
    }
}

我的模型图：

Answer 1

我刚刚从项目中删除了 DBContex 并添加了新的 Context 然后使用 EF v6.4.4 和 Visual Studio 2022 复制粘贴我的整个旧模型结构。 我的问题解决了。 Visual Studio 2017 XML 解析器或创建器似乎与 Visual Studio 2017 不同。 所以当我用 vs2022 创建旧的 XML 结构模型时，问题就解决了