错误消息:
"自数据库创建以来,支持"AddressBook"上下文的模型已更改.请手动删除/更新数据库,或使用IDatabaseInitializer实例调用database.SetInitializer.例如,RecreateDatabaseIfModelChanges策略将自动删除并重新创建数据库,并可以 Select 使用新的d为其种子."阿塔."
我正在try 使用代码优先功能,下面是我写的:
var modelBuilder = new ModelBuilder();
var model = modelBuilder.CreateModel();
using (AddressBook context = new AddressBook(model))
{
var contact = new Contact
{
ContactID = 10000,
FirstName = "Brian",
LastName = "Lara",
ModifiedDate = DateTime.Now,
AddDate = DateTime.Now,
Title = "Mr."
};
context.contacts.Add(contact);
int result = context.SaveChanges();
Console.WriteLine("Result :- "+ result.ToString());
}
上下文类:
public class AddressBook : DbContext
{
public AddressBook()
{ }
public AddressBook(DbModel AddressBook)
: base(AddressBook)
{
}
public DbSet<Contact> contacts { get; set; }
public DbSet<Address> Addresses { get; set; }
}
以及连接字符串:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<connectionStrings>
<add name="AddressBook" providerName="System.Data.SqlClient"
connectionString="Data Source=MyMachine;Initial Catalog=AddressBook;
Integrated Security=True;MultipleActiveResultSets=True;"/>
</connectionStrings>
</configuration>
因此,数据库名为"AddressBook",当我试图将contact对象添加到上下文中时,会发生错误.我有什么遗漏吗?