Linq To Sql进阶系列（三）CUD和Log
系列文章导航：
Linq To Sql进阶系列（四）User Define Function篇
Linq To Sql进阶系列（五）Store Procedure篇
Linq To Sql进阶系列（六）用object的动态查询与保存log篇
Linq To Sql进阶系列（七）动态查询续及CLR与SQL在某些细节上的差别
你可以扑获如下的sql
INSERT INTO [dbo].[Orders]([CustomerID], [EmployeeID], [OrderDate], [RequiredDate], [ShippedDate], [ShipVia], [Freight], [ShipName], [ShipAddress], [ShipCity], [ShipRegion], [ShipPostalCode], [ShipCountry])
VALUES (@p0, @p1, @p2, @p3, @p4, @p5, @p6, @p7, @p8, @p9, @p10, @p11, @p12)
SELECT [t0].[OrderID]FROM [dbo].[Orders] AS [t0]WHERE [t0].[OrderID] = (SCOPE_IDENTITY())-- @p0: Input StringFixedLength (Size = 5; Prec = 0; Scale = 0) []-- @p1: Input Int32 (Size = 0; Prec = 0; Scale = 0) []-- @p2: Input DateTime (Size = 0; Prec = 0; Scale = 0) []-- @p3: Input DateTime (Size = 0; Prec = 0; Scale = 0) []-- @p4: Input DateTime (Size = 0; Prec = 0; Scale = 0) []-- @p5: Input Int32 (Size = 0; Prec = 0; Scale = 0) []-- @p6: Input Currency (Size = 0; Prec = 19; Scale = 4) []-- @p7: Input String (Size = 0; Prec = 0; Scale = 0) []-- @p8: Input String (Size = 4; Prec = 0; Scale = 0) [Test]-- @p9: Input String (Size = 0; Prec = 0; Scale = 0) []-- @p10: Input String (Size = 0; Prec = 0; Scale = 0) []-- @p11: Input String (Size = 0; Prec = 0; Scale = 0) []-- @p12: Input String (Size = 0; Prec = 0; Scale = 0) []-- Context: SqlProvider(Sql2005) Model: AttributedMetaModel Build: 3.5.20706.1这表明Linq To Sql自动更新了该对象，把数据库自增字段的值取出，赋于该对象。从这里，也可以看出，Linq To Sql在插入数据时，自动调用了事务，以防止返回的不是其插入的。
2.2
对与One : Many的关系型的，在提交One端新数据时，Linq To Sql会自动将Many端的数据一起提交。注意，是提交One端哦。比如
var newCategory = new Category { CategoryName = "Widgets",
Description = "Widgets are the customer-facing analogues " +
"to sprockets and cogs."
};
var newProduct = new Product { ProductName = "Blue Widget",
UnitPrice = 34.56M,
Category = newCategory
};
db2.Categories.Add(newCategory);
db2.SubmitChanges();
2.3
而对于Many : Many的关系（关于M:M请参考上篇），就需要你从One 一个个开始，一直到Many端，自己去提交了。如：
var newEmployee = new Employee { FirstName = "Kira",
LastName = "Smith"
};
var newTerritory = new Territory { TerritoryID = "12345",
TerritoryDescription = "Anytown",
Region = db.Regions.First()
};
var newEmployeeTerritory = new EmployeeTerritory { Employee = newEmployee,
Territory = newTerritory
};
db.Employees.Add(newEmployee);
db.Territories.Add(newTerritory);
db.EmployeeTerritories.Add(newEmployeeTerritory);
db.SubmitChanges();