Question

我正在尝试使用以下模型创建mvc应用程序:(代码很大。我认为这对你来说更容易理解）

public class Job
{
    public int JobId { get; set; }
    public string Name { get; set; }

    public List<Job> GetJobs()
    {
        List<Job> jobsList = new List<Job>();
        jobsList.Add(new Job { JobId = 1, Name = "Operator" });
        jobsList.Add(new Job { JobId = 2, Name = "Performer" });
        jobsList.Add(new Job { JobId = 3, Name = "Head" });
        return jobsList;
    }
}

public class Person
{
    public virtual int PersonId { get; set; }
    public string FullName { get; set; }
    public int JobId { get; set; }
    public virtual Job Job;
    public string Phone { get; set; }
    public string Address { get; set; }
    public string Passport { get; set; }
    [DataType(DataType.MultilineText)]
    public string Comments { get; set; }
}

public class PersonPaidTo : Person
{
    [Key]
    public override int PersonId { get; set; }
    public virtual List<Order> Orders { get; set; }
}

public class Head : Person
{
    [Key]
    public override int PersonId { get; set; }
    public Job Job { get; set; }
    public Head()
    {
        Job.Id = 3;
    }
}

我在字段Person中的课程Job中出错：

修饰符'virtual'对此项无效

Answer 1

是的，此代码无效：

public virtual Job Job;

这是宣告字段，字段不能是虚拟的。你要么想要它成为一个财产：

public virtual Job Job { get; set; }

或只是一个字段：

// Ick, public field!
public Job Job;

（我的猜测是你想要前者，但两者都是有效的C＃。）

Answer 2

将字段设为私有并使用公共属性公开的正确方法。

//Field
private Job job;

//Property
public virtual Job Job
    {
        get { return job; }
        set { job= value; }
    }

为什么我得到“修饰符'虚拟'对此项无效”错误？

2 个答案: