本文整理汇总了C#中EarlyLearningCenter.Attach方法的典型用法代码示例。如果您正苦于以下问题：C# EarlyLearningCenter.Attach方法的具体用法？C# EarlyLearningCenter.Attach怎么用？C# EarlyLearningCenter.Attach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类EarlyLearningCenter的用法示例。
在下文中一共展示了EarlyLearningCenter.Attach方法的10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: Can_attach_with_inconsistent_FK_dependent_first_reference_not_fixed_up
[Fact] // Issue #1246
public void Can_attach_with_inconsistent_FK_dependent_first_reference_not_fixed_up()
{
using (var context = new EarlyLearningCenter(TestHelpers.Instance.CreateServiceProvider()))
{
var category = new Category { Id = 1, Name = "Beverages" };
var product = new Product { Id = 1, CategoryId = 7, Name = "Marmite" };
category.Products = new List<Product> { product };
context.Attach(product, behavior: GraphBehavior.SingleObject);
Assert.Equal(7, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Null(product.Category);
Assert.Equal(EntityState.Detached, context.Entry(category).State);
Assert.Equal(EntityState.Unchanged, context.Entry(product).State);
context.Attach(category, behavior: GraphBehavior.SingleObject);
Assert.Equal(7, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Null(product.Category);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
Assert.Equal(EntityState.Unchanged, context.Entry(product).State);
}
}示例2: using
[Fact] // Issue #1246
public void Can_set_set_to_Unchanged_with_inconsistent_FK_principal_first_reference_not_fixed_up_with_tracked_FK_match()
{
using (var context = new EarlyLearningCenter(TestHelpers.Instance.CreateServiceProvider()))
{
var category7 = context.Attach(new Category { Id = 7, Products = new List<Product>() }, behavior: GraphBehavior.SingleObject).Entity;
var category = new Category { Id = 1, Name = "Beverages" };
var product = new Product { Id = 1, CategoryId = 7, Name = "Marmite" };
category.Products = new List<Product> { product };
context.Entry(category).State = EntityState.Unchanged;
Assert.Equal(7, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Null(product.Category);
Assert.Empty(category7.Products);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
Assert.Equal(EntityState.Detached, context.Entry(product).State);
context.Entry(product).State = EntityState.Unchanged;
Assert.Equal(7, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category7, product.Category);
Assert.Same(product, category7.Products.Single());
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
Assert.Equal(EntityState.Unchanged, context.Entry(product).State);
}
}示例3: Can_attach_with_inconsistent_FK_principal_first_fully_fixed_up
[Fact] // Issue #1246
public void Can_attach_with_inconsistent_FK_principal_first_fully_fixed_up()
{
using (var context = new EarlyLearningCenter(TestHelpers.Instance.CreateServiceProvider()))
{
var category = new Category { Id = 1, Name = "Beverages" };
var product = new Product { Id = 1, CategoryId = 7, Name = "Marmite", Category = category };
category.Products = new List<Product> { product };
context.Attach(category, behavior: GraphBehavior.SingleObject);
Assert.Equal(7, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
Assert.Equal(EntityState.Detached, context.Entry(product).State);
context.Attach(product, behavior: GraphBehavior.SingleObject);
Assert.Equal(7, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
// Dependent is Unchanged here because the FK change happened before it was attached
Assert.Equal(EntityState.Unchanged, context.Entry(product).State);
}
}示例4: Can_set_set_to_Unchanged_with_inconsistent_FK_dependent_first_fully_fixed_up_with_tracked_FK_match
[Fact] // Issue #1246
public void Can_set_set_to_Unchanged_with_inconsistent_FK_dependent_first_fully_fixed_up_with_tracked_FK_match()
{
using (var context = new EarlyLearningCenter(TestHelpers.Instance.CreateServiceProvider()))
{
var category7 = context.Attach(new Category { Id = 7, Products = new List<Product>() }).Entity;
var category = new Category { Id = 1, Name = "Beverages" };
var product = new Product { Id = 1, CategoryId = 7, Name = "Marmite", Category = category };
category.Products = new List<Product> { product };
context.Entry(product).State = EntityState.Unchanged;
Assert.Equal(1, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Empty(category7.Products);
Assert.Equal(EntityState.Detached, context.Entry(category).State);
Assert.Equal(EntityState.Modified, context.Entry(product).State);
context.Entry(category).State = EntityState.Unchanged;
Assert.Equal(1, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Empty(category7.Products);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
Assert.Equal(EntityState.Modified, context.Entry(product).State);
}
}示例5: Can_attach_with_inconsistent_FK_dependent_first_collection_not_fixed_up
[Fact] // Issue #1246
public void Can_attach_with_inconsistent_FK_dependent_first_collection_not_fixed_up()
{
using (var context = new EarlyLearningCenter(TestHelpers.Instance.CreateServiceProvider()))
{
var category = new Category { Id = 1, Name = "Beverages" };
var product = new Product { Id = 1, CategoryId = 7, Name = "Marmite", Category = category };
category.Products = new List<Product>();
context.Attach(product);
Assert.Equal(1, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Equal(EntityState.Detached, context.Entry(category).State);
Assert.Equal(EntityState.Modified, context.Entry(product).State);
context.Attach(category);
Assert.Equal(1, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
Assert.Equal(EntityState.Modified, context.Entry(product).State);
}
}示例6: Can_attach_with_inconsistent_FK_principal_first_reference_not_fixed_up_with_tracked_FK_match
[Fact] // Issue #1246
public void Can_attach_with_inconsistent_FK_principal_first_reference_not_fixed_up_with_tracked_FK_match()
{
using (var context = new EarlyLearningCenter(TestHelpers.Instance.CreateServiceProvider()))
{
var category7 = context.Attach(new Category { Id = 7, Products = new List<Product>() }).Entity;
var category = new Category { Id = 1, Name = "Beverages" };
var product = new Product { Id = 1, CategoryId = 7, Name = "Marmite" };
category.Products = new List<Product> { product };
context.Attach(category);
Assert.Equal(1, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Empty(category7.Products);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
Assert.Equal(EntityState.Detached, context.Entry(product).State);
context.Attach(product);
Assert.Equal(1, product.CategoryId);
Assert.Same(product, category.Products.Single());
Assert.Same(category, product.Category);
Assert.Empty(category7.Products);
Assert.Equal(EntityState.Unchanged, context.Entry(category).State);
// Dependent is Unchanged here because the FK change happened before it was attached
Assert.Equal(EntityState.Unchanged, context.Entry(product).State);
}
}示例7: Explicitly_calling_DetectChanges_works_even_if_auto_DetectChanges_is_switched_off
public void Explicitly_calling_DetectChanges_works_even_if_auto_DetectChanges_is_switched_off()
{
using (var context = new EarlyLearningCenter())
{
context.ChangeTracker.AutoDetectChangesEnabled = false;
var entry = context.Attach(new Product { Id = 1, CategoryId = 66 });
entry.Entity.CategoryId = 77;
Assert.Equal(EntityState.Unchanged, entry.State);
context.ChangeTracker.DetectChanges();
Assert.Equal(EntityState.Modified, entry.State);
}
}示例8: Auto_DetectChanges_for_Entries_can_be_switched_off
public void Auto_DetectChanges_for_Entries_can_be_switched_off(bool useGenericOverload)
{
using (var context = new EarlyLearningCenter())
{
context.ChangeTracker.AutoDetectChangesEnabled = false;
var entry = context.Attach(new Product { Id = 1, CategoryId = 66 });
entry.Entity.CategoryId = 77;
Assert.Equal(EntityState.Unchanged, entry.State);
if (useGenericOverload)
{
context.ChangeTracker.Entries<Product>();
}
else
{
context.ChangeTracker.Entries();
}
Assert.Equal(EntityState.Unchanged, entry.State);
}
}示例9: Entries_calls_DetectChanges_by_default
public void Entries_calls_DetectChanges_by_default(bool useGenericOverload)
{
using (var context = new EarlyLearningCenter())
{
var entry = context.Attach(new Product { Id = 1, CategoryId = 66 });
entry.Entity.CategoryId = 77;
Assert.Equal(EntityState.Unchanged, entry.State);
if (useGenericOverload)
{
context.ChangeTracker.Entries<Product>();
}
else
{
context.ChangeTracker.Entries();
}
Assert.Equal(EntityState.Modified, entry.State);
}
}示例10: Entities_that_are_already_tracked_will_not_get_attached
public void Entities_that_are_already_tracked_will_not_get_attached()
{
using (var context = new EarlyLearningCenter())
{
var existingProduct = context.Attach(new Product { Id = 2, CategoryId = 1 }).Entity;
var category = new Category
{
Id = 1,
Products = new List<Product>
{
new Product { Id = 1 },
existingProduct,
new Product { Id = 3 }
}
};
context.ChangeTracker.TrackGraph(category, e => e.State = EntityState.Modified);
Assert.Equal(4, context.ChangeTracker.Entries().Count());
Assert.Equal(EntityState.Modified, context.Entry(category).State);
Assert.Equal(EntityState.Modified, context.Entry(category.Products[0]).State);
Assert.Equal(EntityState.Unchanged, context.Entry(category.Products[1]).State);
Assert.Equal(EntityState.Modified, context.Entry(category.Products[2]).State);
Assert.Same(category, category.Products[0].Category);
Assert.Same(category, category.Products[1].Category);
Assert.Same(category, category.Products[2].Category);
Assert.Equal(category.Id, category.Products[0].CategoryId);
Assert.Equal(category.Id, category.Products[1].CategoryId);
Assert.Equal(category.Id, category.Products[2].CategoryId);
}
}