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C# DbContext.SaveChangesAsync方法代码示例

本文整理汇总了C#中DbContext.SaveChangesAsync方法的典型用法代码示例。如果您正苦于以下问题:C# DbContext.SaveChangesAsync方法的具体用法?C# DbContext.SaveChangesAsync怎么用?C# DbContext.SaveChangesAsync使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在DbContext的用法示例。


在下文中一共展示了DbContext.SaveChangesAsync方法的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: It_throws_object_disposed_exception

        public async void It_throws_object_disposed_exception()
        {
            var context = new DbContext(new DbContextOptions<DbContext>());
            context.Dispose();

            // methods (tests all paths)
            Assert.Throws<ObjectDisposedException>(() => context.Add(new object()));
            Assert.Throws<ObjectDisposedException>(() => context.Attach(new object()));
            Assert.Throws<ObjectDisposedException>(() => context.Update(new object()));
            Assert.Throws<ObjectDisposedException>(() => context.Remove(new object()));
            Assert.Throws<ObjectDisposedException>(() => context.SaveChanges());
            await Assert.ThrowsAsync<ObjectDisposedException>(() => context.SaveChangesAsync());

            var methodCount = typeof(DbContext).GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly).Count();
            var expectedMethodCount = 27;
            Assert.True(
                methodCount == expectedMethodCount,
                userMessage: $"Expected {expectedMethodCount} methods on DbContext but found {methodCount}. " +
                    "Update test to ensure all methods throw ObjectDisposedException after dispose.");

            // getters
            Assert.Throws<ObjectDisposedException>(() => context.ChangeTracker);
            Assert.Throws<ObjectDisposedException>(() => context.Model);

            var expectedProperties = new List<string> { "ChangeTracker", "Database", "Model" };

            Assert.True(expectedProperties.SequenceEqual(
                    typeof(DbContext)
                    .GetProperties()
                    .Select(p => p.Name)
                    .OrderBy(s => s)
                    .ToList()),
                userMessage: "Unexpected properties on DbContext. " + 
                    "Update test to ensure all getters throw ObjectDisposedException after dispose.");

            Assert.Throws<ObjectDisposedException>(() => ((IInfrastructure<IServiceProvider>)context).Instance);
        }
开发者ID:adwardliu,项目名称:EntityFramework,代码行数:37,代码来源:DbContextTest.cs

示例2: Can_add_update_delete_end_to_end_using_partial_shadow_state

        public async Task Can_add_update_delete_end_to_end_using_partial_shadow_state()
        {
            var model = new Model();

            var customerType = new EntityType(typeof(Customer));
            customerType.SetKey(customerType.AddProperty("Id", typeof(int), shadowProperty: false, concurrencyToken: false));
            customerType.AddProperty("Name", typeof(string), shadowProperty: true, concurrencyToken: false);

            model.AddEntityType(customerType);

            var options = new DbContextOptions()
                .UseModel(model)
                .UseInMemoryStore();

            var customer = new Customer { Id = 42 };

            using (var context = new DbContext(options))
            {
                context.Add(customer);

                // TODO: Better API for shadow state access
                var customerEntry = context.ChangeTracker.Entry(customer).StateEntry;
                customerEntry[customerType.GetProperty("Name")] = "Daenerys";

                await context.SaveChangesAsync();

                customerEntry[customerType.GetProperty("Name")] = "Changed!";
            }

            using (var context = new DbContext(options))
            {
                var customerFromStore = context.Set<Customer>().Single();

                Assert.Equal(42, customerFromStore.Id);
                Assert.Equal(
                    "Daenerys",
                    (string)context.ChangeTracker.Entry(customerFromStore).Property("Name").CurrentValue);
            }

            using (var context = new DbContext(options))
            {
                var customerEntry = context.ChangeTracker.Entry(customer).StateEntry;
                customerEntry[customerType.GetProperty("Name")] = "Daenerys Targaryen";

                context.Update(customer);

                await context.SaveChangesAsync();
            }

            using (var context = new DbContext(options))
            {
                var customerFromStore = context.Set<Customer>().Single();

                Assert.Equal(42, customerFromStore.Id);
                Assert.Equal(
                    "Daenerys Targaryen",
                    (string)context.ChangeTracker.Entry(customerFromStore).Property("Name").CurrentValue);
            }

            using (var context = new DbContext(options))
            {
                context.Delete(customer);

                await context.SaveChangesAsync();
            }

            using (var context = new DbContext(options))
            {
                Assert.Equal(0, context.Set<Customer>().Count());
            }
        }
开发者ID:Nyaoso,项目名称:EntityFramework,代码行数:71,代码来源:ShadowStateUpdateTest.cs

示例3: SaveChangesAsync_calls_state_manager_SaveChangesAsync

        public async Task SaveChangesAsync_calls_state_manager_SaveChangesAsync()
        {
            var services = new ServiceCollection()
                .AddScoped<IStateManager, FakeStateManager>()
                .AddScoped<IChangeDetector, FakeChangeDetector>();

            var serviceProvider = TestHelpers.Instance.CreateServiceProvider(services);

            using (var context = new DbContext(serviceProvider, new DbContextOptionsBuilder().Options))
            {
                context.ChangeTracker.AutoDetectChangesEnabled = false;

                var stateManager = (FakeStateManager)context.GetService<IStateManager>();

                var entryMock = CreateInternalEntryMock();
                entryMock.Setup(m => m.EntityState).Returns(EntityState.Modified);
                stateManager.InternalEntries = new[] { entryMock.Object };

                Assert.False(stateManager.SaveChangesAsyncCalled);

                await context.SaveChangesAsync();

                Assert.True(stateManager.SaveChangesAsyncCalled);
            }
        }
开发者ID:adwardliu,项目名称:EntityFramework,代码行数:25,代码来源:DbContextTest.cs

示例4: Can_add_update_delete_end_to_end_using_only_shadow_state

        public async Task Can_add_update_delete_end_to_end_using_only_shadow_state()
        {
            var model = new Model();

            var customerType = new EntityType("Customer");
            customerType.SetKey(customerType.AddProperty("Id", typeof(int), shadowProperty: true, concurrencyToken: false));
            customerType.AddProperty("Name", typeof(string), shadowProperty: true, concurrencyToken: false);

            model.AddEntityType(customerType);

            var options = new DbContextOptions()
                .UseModel(model)
                .UseInMemoryStore();

            using (var context = new DbContext(options))
            {
                // TODO: Better API for shadow state access
                var customerEntry = context.ChangeTracker.StateManager.CreateNewEntry(customerType);
                customerEntry[customerType.GetProperty("Id")] = 42;
                customerEntry[customerType.GetProperty("Name")] = "Daenerys";

                await customerEntry.SetEntityStateAsync(EntityState.Added);

                await context.SaveChangesAsync();

                customerEntry[customerType.GetProperty("Name")] = "Changed!";
            }

            // TODO: Fix this when we can query shadow entities
            // var customerFromStore = await inMemoryDataStore.Read(customerType).SingleAsync();
            //
            // Assert.Equal(new object[] { 42, "Daenerys" }, customerFromStore);

            using (var context = new DbContext(options))
            {
                var customerEntry = context.ChangeTracker.StateManager.CreateNewEntry(customerType);
                customerEntry[customerType.GetProperty("Id")] = 42;
                customerEntry[customerType.GetProperty("Name")] = "Daenerys Targaryen";

                await customerEntry.SetEntityStateAsync(EntityState.Modified);

                await context.SaveChangesAsync();
            }

            // TODO: Fix this when we can query shadow entities
            // customerFromStore = await inMemoryDataStore.Read(customerType).SingleAsync();
            // 
            // Assert.Equal(new object[] { 42, "Daenerys Targaryen" }, customerFromStore);

            using (var context = new DbContext(options))
            {
                var customerEntry = context.ChangeTracker.StateManager.CreateNewEntry(customerType);
                customerEntry[customerType.GetProperty("Id")] = 42;

                await customerEntry.SetEntityStateAsync(EntityState.Deleted);

                await context.SaveChangesAsync();
            }

            // TODO: Fix this when we can query shadow entities
            // Assert.Equal(0, await inMemoryDataStore.Read(customerType).CountAsync());
        }
开发者ID:Nyaoso,项目名称:EntityFramework,代码行数:62,代码来源:ShadowStateUpdateTest.cs


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