c# - 在 C# 4.0 中实现 IEnumerable

Question

我有这门课:

public class Detail
{
    public Detail() { }
    public Detail(Guid Id, DateTime InstanceDate, string Name)
    {
        CId = Id;
        StateInstanceDate = InstanceDate;
        StateName = Name;
    }

    public Guid CId { get; set; }
    public DateTime StateInstanceDate { get; set; }
    public string StateName { get; set; }
}

这就是我尝试使用 LINQ 访问数据的方式:

public List<Detail> Getinfo()
{
    CaseContext cs = new CaseContext();
    var query = (from p in cs.table1    
                join q in cs.table2  
                 on p.StateKey equals q.StateKey 
                 select new Detail
                 {
                     p.CId,
                     p.InstanceDate,
                     q.StateName
                 }).ToList<Detail>();

    cs.Dispose();
    return query;
}

但是我得到了这个错误，

Cannot initialize type 'Detail' with a collection initializer because it does not implement 'System.Collections.IEnumerable'

有什么帮助吗？

Answer 1

您必须正确分配属性或使用构造函数:

select new Detail( p.CId, p.InstanceDate, q.StateName)

或者

select new Detail 
{
  CId = p.CId, 
  StateInstanceDate = p.InstanceDate, 
  StateName = q.StateName 
}