Entity Framework学习初级篇7--基本操作：增加、更新、删除、事务

Entity Framework学习初级篇7--基本操作：增加、更新、删除、事务2010-02-05 博客园 ♂风车车.Net本节，直接写通过代码来学习。这些基本操作都比较简单，与这些基本操作相关的内容在之前的1至6节基本介绍完毕。

l 增加：

方法1：使用AddToXXX（xxx）方法：实例代码如下：

using （var edm = new NorthwindEntities（））

{

Customers c = new Customers { CustomerID = "c#", City = "成都市", Address = "中国四川省", CompanyName = "cnblogs", Country = "中国", Fax = "10086", Phone = "1008611", PostalCode = "610000", Region = "天府广场", ContactName = "风车车.Net" };

edm.AddToCustomers（c）;

int result = edm.SaveChanges（）;

Assert.AreEqual （result, 1）;

Customers addc = edm.Customers.FirstOrDefault（cc => cc.CustomerID == "c#"）;

Console.WriteLine（"CustomerId={0},City={1}", addc.CustomerID, addc.City）;

}

方法2：使用ObjectContext的AddObject（string entitySetName, object entity）方法。实例代码如下：

using （var edm = new NorthwindEntities（））

{

Customers c = new Customers { CustomerID = "c2", City = "成都市2", Address = "中国四川省2", CompanyName = "cnblogs", Country = "中国", Fax = "10086", Phone = "1008611", PostalCode = "610000", Region = "天府广场", ContactName = "风车车.Net" };

edm.AddObject（"Customers", c）;

int result = edm.SaveChanges（）;

Assert.AreEqual （result, 1）;

Customers addc = edm.Customers.FirstOrDefault（cc => cc.CustomerID == "c2"）;

Console.WriteLine（"CustomerId={0},City={1}", addc.CustomerID, addc.City）;

}