C# DbSet类代码示例

        public static void Transfer(SupermarketsEntities sqlserver)
        {
            using (var mysql = new MySqlSupermarket())
            {
                // SET IDENTITY_INSERT (Transact-SQL) http://msdn.microsoft.com/en-us/library/ms188059.aspx
                sqlserver.Database.ExecuteSqlCommand("SET IDENTITY_INSERT Vendors ON");
                sqlserver.Database.ExecuteSqlCommand("SET IDENTITY_INSERT Measures ON");
                sqlserver.Database.ExecuteSqlCommand("SET IDENTITY_INSERT Products ON");

                var mysqlTables = new IEnumerable[] { mysql.Vendors, mysql.Measures, mysql.Products };
                var sqlserverEntityFactories = new Func<object>[] { () => new Vendor(), () => new Measure(), () => new Product() };
                var sqlserverTables = new DbSet[] { sqlserver.Vendors, sqlserver.Measures, sqlserver.Products };

                for (int ii = 0; ii < mysqlTables.Length; ii++)
                {
                    foreach (var mysqlObject in mysqlTables[ii])
                    {
                        var sqlserverObject = sqlserverEntityFactories[ii]();
                        sqlserverObject.LoadPropertiesFrom(mysqlObject);
                        sqlserverTables[ii].Add(sqlserverObject);
                    }
                }

                sqlserver.SaveChanges();

                sqlserver.Database.ExecuteSqlCommand("SET IDENTITY_INSERT Vendors OFF");
                sqlserver.Database.ExecuteSqlCommand("SET IDENTITY_INSERT Measures OFF");
                sqlserver.Database.ExecuteSqlCommand("SET IDENTITY_INSERT Products OFF");
            }
        }

        public void RemoveDbSetDataDatabase(DbSet set)
        {
            RemoveDbSetData(set);
            SaveChanges();

            dataDeleter.DeleteAllObjects();
        }

        public static IQueryable<SetSubmission> NewestSubmissionsFromASub(string subverseName, DbSet<Message> messagesDbSet, string setName, int desiredResults)
        {
            var topRankedSubmissions = (from message in messagesDbSet
                                        where !message.IsDeleted && message.Subverse == subverseName
                                        select new SetSubmission
                                        {
                                            Id = message.Id,
                                            Votes = message.Votes,
                                            Name = message.Name,
                                            Date = message.Date,
                                            Type = message.Type,
                                            Linkdescription = message.Linkdescription,
                                            Title = message.Title,
                                            Rank = message.Rank,
                                            MessageContent = message.MessageContent,
                                            Subverse = message.Subverse,
                                            Likes = message.Likes,
                                            Dislikes = message.Dislikes,
                                            Thumbnail = message.Thumbnail,
                                            LastEditDate = message.LastEditDate,
                                            FlairLabel = message.FlairLabel,
                                            FlairCss = message.FlairCss,
                                            Anonymized = message.Anonymized,
                                            Views = message.Views,
                                            Comments = message.Comments,
                                            Votingtrackers = message.Votingtrackers,
                                            Subverses = message.Subverses,
                                            Stickiedsubmission = message.Stickiedsubmission,
                                            Viewstatistics = message.Viewstatistics,
                                            ParentSet = setName
                                        }).OrderByDescending(s => s.Date).Take(desiredResults).AsNoTracking();

            return topRankedSubmissions;
        }

        public async Task DbSetGetAsyncTest()
        {
            //Arrange
            var mockRestResponse = new Mock<IRestResponse>();
            mockRestResponse.SetupGet(o => o.ResponseStatus).Returns(ResponseStatus.Completed);
            mockRestResponse.SetupGet(o => o.StatusCode).Returns(HttpStatusCode.OK);
            mockRestResponse.SetupGet(o => o.Content).Returns(@"{
                  ""contactId"": ""48620"",
                  ""id"": ""10002"",
                  ""fieldValues"": [
                    {
                      ""id"": ""824"",
                      ""value"": ""transxId12321321321321""
                    }
                  ],
                  ""name"": ""Test Name WHAT IS THIS"",
                  ""uri"": ""/data/customObject""
                }
            ");


            var mockRestClient = new Mock<IRestClient>();
            mockRestClient.Setup(o => o.ExecuteTaskAsync(It.IsAny<IRestRequest>())).ReturnsAsync(mockRestResponse.Object);

            var dbSet = new DbSet<MockDbsetWithDataContact>(mockRestClient.Object);

            //Act
            var contact = await dbSet.GetAsync(1, Depth.Complete);

            //Assert
            Assert.AreEqual(10002, contact.Id);
        }

 public LgEloquaContext(IRestClient restClient)
     : base(restClient)
 {
     BadContacts = new DbSet<BadContact>(restClient);
     LgContacts = new DbSet<LgContact>(restClient);
     ExtendedContacts = new DbSet<ExtendedContact>(restClient);
 }

 public ComputerRepository(DbSet<ComputerModel> computers, Action save, DbSet<ScriptModel> scripts, DbSet<UserModel> users)
 {
     _computers = computers;
     _save = save;
     _scripts = scripts;
     _users = users;
 }

        public static IQueryable<SetSubmission> NewestSubmissionsFromASub(string subverseName, DbSet<Submission> submissionDBSet, string setName, int desiredResults)
        {
            var topRankedSubmissions = (from submission in submissionDBSet
                                        where !submission.IsDeleted && submission.Subverse == subverseName
                                        select new SetSubmission
                                        {
                                            ID = submission.ID,
                                            Votes = submission.Votes,
                                            UserName = submission.UserName,
                                            CreationDate = submission.CreationDate,
                                            Type = submission.Type,
                                            LinkDescription = submission.LinkDescription,
                                            Title = submission.Title,
                                            Rank = submission.Rank,
                                            Content = submission.Content,
                                            Subverse = submission.Subverse,
                                            UpCount = submission.UpCount,
                                            DownCount = submission.DownCount,
                                            Thumbnail = submission.Thumbnail,
                                            LastEditDate = submission.LastEditDate,
                                            FlairLabel = submission.FlairLabel,
                                            FlairCss = submission.FlairCss,
                                            IsAnonymized = submission.IsAnonymized,
                                            Views = submission.Views,
                                            Comments = submission.Comments,
                                            SubmissionVoteTrackers = submission.SubmissionVoteTrackers,
                                            Subverse1 = submission.Subverse1,
                                            StickiedSubmission = submission.StickiedSubmission,
                                            ViewStatistics = submission.ViewStatistics,
                                            ParentSet = setName
                                        }).OrderByDescending(s => s.CreationDate).Take(desiredResults).AsNoTracking();

            return topRankedSubmissions;
        }

 public NetworkGuestRepository(DbSet<NetworkGuestModel> entries, DbSet<NetworkModel> networks, Action save, DbSet<UserModel> users)
 {
     _entries = entries;
     _networks = networks;
     _save = save;
     _users = users;
 }

 public ConnectedRepository()
 {
     _context = new NinjaContext();
     _ninjas = _context.Ninjas;
     _clans = _context.Clans;
     _equipment = _context.Equipment;
 }

 public StudentRepository(StuaContext context)
 {
     this.context = context;
     studenten = context.Studenten;
     stages = context.Stages;
     favorietestages = context.StudentStage;
 }

 // Constructor
 public BedrijfRepository(InternshipContext context)
 {
     this.context = context;
     bedrijven = context.Bedrijven;
     opdrachten = context.Opdrachten;
     contactpersonen = context.ContactPersonen;
 }

 public UnitRepository(IUnitOfWork unitOfWork, IDocRepository docRepository, IDomainValidator validator)
 {
     this.unitOfWork = unitOfWork;
     this.docRepository = docRepository;
     this.validator = validator;
     unitsInContext = unitOfWork.DbContext.Set<Unit>();
 }

 public BegeleiderRepository(StuaContext context)
 {
     this.context = context;
     begeleiders = context.Begeleiders;
     stages = context.Stages;
     studenten = context.Studenten;
 }

 public BedrijfRepository(StuaContext context)
 {
     this.context = context;
     bedrijven = context.Bedrijven;
     stages = context.Stages;
     bedrijfspersonen = context.Bedrijfspersonen;
 }

 public DataProvider(Dictionary<string, string> cons) {
     //Create movie context
     dbConnString = cons["SqlConnString"];
     db = new MoviesContext(dbConnString);
     Movies = db.Movies;
     
 }