C# 输入字符串的格式不正确EF6

我目前正在使用EF6，并尝试首先使用代码实现一对多关系：

public class Schedule
{
    public int ScheduleId { get; set; }
}

public class Instruction
{
    public int Id { get; set; }
    public Schedule Schedule { get; set; }
}

我遵守第一公约

在我的方法中，我首先尝试添加一个空计划：

public class ScheduleRepo  {
    public void SetSchedule()
    {
        Schedule schedule = new Schedule();
        using (UptrenderDbContext ctx = new UptrenderDbContext())
        {
            ctx.Schedules.Add(schedule);
            ctx.SaveChanges();
        }
    }
}´

从测试调用该方法：

[TestFixture]
public class ScheduleRepoTest {

    private readonly ScheduleRepo repo = new ScheduleRepo();

    [Test]
    public void TestSetSchedule()
    {
        repo.SetSchedule();     
    }
}

我的上下文如下所示：

    [DbConfigurationType(typeof(MySqlEFConfiguration))]
    public class UptrenderDbContext : DbContext
    {
        public DbSet<Schedule> Schedules { get; set; }
        public DbSet<Instruction> Instructions { get; set; } //Not used yet

        public UptrenderDbContext () {
            Database.SetInitializer(new DropCreateDatabaseAlways<UptrenderDbContext >());
        }
    }

我注意到，如果我从

指令

中删除

public Schedule Schedule{get；set；}

，则不会引发异常，并且

Schedule

已成功添加到数据库中

---

我可能错过了一些非常琐碎的东西，因为我是EF6新手。

堆栈跟踪会有所帮助。不清楚异常发生在哪里（您的代码，EF代码？）。

scheduleEntity

看起来像什么？@MarkC它只包含一个Id@GertArnold添加堆栈跟踪您的示例中是否有输入错误？您可以将新设置为“schedule”，但可以将“scheduleEntity”添加到数据库集中。。不管怎样，错误是当它试图创建数据库时，因此您的迁移配置似乎有问题，可能是试图填充默认记录？给定一个现有的数据库，插入这样一个简单的实体应该不会有任何问题。我会先看代码配置。

    System.FormatException : Input string was not in a correct format.
   at System.Number.ParseDouble(String value, NumberStyles options, NumberFormatInfo numfmt)
   at System.Convert.ToDouble(String value)
   at MySql.Data.Entity.MySqlMigrationSqlGenerator.Generate(CreateIndexOperation op)
   at MySql.Data.Entity.MySqlMigrationSqlGenerator.Generate(IEnumerable`1 migrationOperations, String providerManifestToken)
   at System.Data.Entity.Migrations.DbMigrator.ExecuteOperations(String migrationId, VersionedModel targetModel, IEnumerable`1 operations, IEnumerable`1 systemOperations, Boolean downgrading, Boolean auto)
   at System.Data.Entity.Migrations.DbMigrator.AutoMigrate(String migrationId, VersionedModel sourceModel, VersionedModel targetModel, Boolean downgrading)
   at System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
   at System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String targetMigration)
   at System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
   at System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)
   at System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func`3 createMigrator, ObjectContext objectContext)
   at System.Data.Entity.Database.Create(DatabaseExistenceState existenceState)
   at System.Data.Entity.DropCreateDatabaseAlways`1.InitializeDatabase(TContext context)
   at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action)
   at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization()
   at System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action)
   at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
   at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
   at System.Data.Entity.Internal.Linq.InternalSet`1.ActOnSet(Action action, EntityState newState, Object entity, String methodName)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Add(Object entity)
   at System.Data.Entity.DbSet`1.Add(TEntity entity)
   at Data.Repos.Impl.ScheduleRepo.SetSchedule() in C:\Users\Benjamin\Desktop\uptrender\Data\Repos\Impl\ScheduleRepo.cs:line 20
   at Data.Tests.ScheduleRepoTest.TestSetSchedule() in C:\Users\Benjamin\Desktop\uptrender\Data\Tests\ScheduleRepoTest.cs:line 21