[英]EF Migration for Universal Windows Platform
我有跟随DbContext,我想使用Entity Framwork迁移它
public class TestDbContext: DbContext
{
public DbSet<State> States { get; set; }
public DbSet<StateType> StateTypes { get; set; }
public DbSet<Measure> Measures { get; set; }
public DbSet<Priority> Priorities { get; set; }
public DbSet<Task> Tasks { get; set; }
public DbSet<TaskType> TaskTypes { get; set; }
public DbSet<Document> Documents { get; set; }
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
string databaseFilePath = "test.db";
try
{
databaseFilePath = Path.Combine(ApplicationData.Current.LocalFolder.Path, databaseFilePath);
}
catch (InvalidOperationException) { }
optionsBuilder.UseSqlite($"Data source={databaseFilePath}");
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
}
我发表了声明
enable-migrations -ContextTypeName TestData.TestDbContext
在程序包管理器控制台中生成配置。 但是这一代有编译错误,因为无法找到以下命名空间/类:
using System.Data.Entity;
using System.Data.Entity.Migrations;
DbMigrationsConfiguration
。
namespace TestData.Migrations
{
using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
internal sealed class Configuration : DbMigrationsConfiguration<TestDatas.TestDbContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
}
protected override void Seed(TestDatas.TestDbContext context)
{
// This method will be called after migrating to the latest version.
// You can use the DbSet<T>.AddOrUpdate() helper extension method
// to avoid creating duplicate seed data. E.g.
//
// context.People.AddOrUpdate(
// p => p.FullName,
// new Person { FullName = "Andrew Peters" },
// new Person { FullName = "Brice Lambson" },
// new Person { FullName = "Rowan Miller" }
// );
//
}
}
}
有关配置如何编译的任何解决方案,以便我可以添加迁移?
有关EF7的文档可能会有所帮助。
我测试过, DbContext
应该使用这个引用:
using Microsoft.Data.Entity;
并using System.Data.Entity.Migrations;
也应改为
using Microsoft.Data.Entity.Migrations;
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