我下面这个教程中，我试图在USERPROFILE表中添加了一些新的栏目。 我试图创建一个新表。
public class UsersContext : DbContext
{
public UsersContext()
: base("DefaultConnection")
{
}
public DbSet<UserProfile> UserProfiles { get; set; }
public DbSet<TestTabel> TestTabel { get; set; }
}
[Table("UserProfile")]
public class UserProfile
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int UserId { get; set; }
public string UserName { get; set; }
public string Mobile { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
}
[Table("TestTabel")]
public class TestTabel
{
[Key]
[DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)]
public int TestId { get; set; }
public string TestName { get; set; }
public string TestMobile { get; set; }
}
比我尝试更新与更新数据库命令控制台的数据库，我得到这个错误信息：
目前已经在数据库中名为“用户配置”的对象。
新列，其中不添加，也不表。
我在想什么？
[编辑]我做的附加迁移和更新数据库命令，这是出落得（不得不做了更新的数据库命令两次，第二次有详细）
PM> Add-Migration
cmdlet Add-Migration at command pipeline position 1
Supply values for the following parameters:
Name: test
Scaffolding migration 'test'.
The Designer Code for this migration file includes a snapshot of your current Code First model. This snapshot is used to calculate the changes to your model when you scaffold the next migration. If you make additional changes to your model that you want to include in this migration, then you can re-scaffold it by running 'Add-Migration 201304011714212_test' again.
PM> Update-Database
The project 'MVC4SimpleMembershipCodeFirstSeedingEF5' failed to build.
PM> Update-Database
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
Applying code-based migrations: [201304011714212_test].
Applying code-based migration: 201304011714212_test.
Running Seed method.
PM> Update-Database -verbose
Using StartUp project 'MVC4SimpleMembershipCodeFirstSeedingEF5'.
Using NuGet project 'MVC4SimpleMembershipCodeFirstSeedingEF5'.
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
Target database is: 'aspnet-MVC4SimpleMembershipCodeFirstSeedingEF5' (DataSource: ., Provider: System.Data.SqlClient, Origin: Configuration).
No pending code-based migrations.
Running Seed method.
PM>
[/编辑]
Configuration.cs：
namespace MVC4SimpleMembershipCodeFirstSeedingEF5.Migrations
{
internal sealed class Configuration : DbMigrationsConfiguration<UsersContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = true;
}
protected override void Seed(UsersContext context)
{
WebSecurity.InitializeDatabaseConnection(
"DefaultConnection",
"UserProfile",
"UserId",
"UserName", autoCreateTables: true);
if (!Roles.RoleExists("Administrator"))
Roles.CreateRole("Administrator");
if (!WebSecurity.UserExists("test"))
WebSecurity.CreateUserAndAccount(
"test",
"password",
new { Mobile = "+19725000374", FirstName = "test", LastName = "test" });
if (!Roles.GetRolesForUser("test").Contains("Administrator"))
Roles.AddUsersToRoles(new[] { "test" }, new[] { "Administrator" });
}
}
}
在过滤器文件夹1 CS文件：
namespace MVC4SimpleMembershipCodeFirstSeedingEF5.Filters
{
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false,
Inherited = true)]
public sealed class InitializeSimpleMembershipAttribute : ActionFilterAttribute
{
private static SimpleMembershipInitializer _initializer;
private static object _initializerLock = new object();
private static bool _isInitialized;
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
// Ensure ASP.NET Simple Membership is initialized only once per app start
LazyInitializer.EnsureInitialized(ref _initializer, ref _isInitialized, ref _initializerLock);
}
private class SimpleMembershipInitializer
{
public SimpleMembershipInitializer()
{
Database.SetInitializer<UsersContext>(null);
try
{
using (var context = new UsersContext())
{
if (!context.Database.Exists())
{
// Create the SimpleMembership database without Entity Framework migration schema
((IObjectContextAdapter)context).ObjectContext.CreateDatabase();
}
}
WebSecurity.InitializeDatabaseConnection("DefaultConnection", "UserProfile", "UserId", "UserName", autoCreateTables: true);
}
catch (Exception ex)
{
throw new InvalidOperationException("The ASP.NET Simple Membership database could not be initialized. For more information, please see http://go.microsoft.com/fwlink/?LinkId=256588", ex);
}
}
}
}
}
连接字符串：
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
最后迁移：
namespace MVC4SimpleMembershipCodeFirstSeedingEF5.Migrations
{
using System;
using System.Data.Entity.Migrations;
public partial class test : DbMigration
{
public override void Up()
{
CreateTable(
"dbo.TestTabel",
c => new
{
TestId = c.Int(nullable: false, identity: true),
TestName = c.String(),
TestMobile = c.String(),
})
.PrimaryKey(t => t.TestId);
}
public override void Down()
{
DropTable("dbo.TestTabel");
}
}
}
