ASP.Net C＃MVC組域模型並將結果放入ViewModel

Question

我想從我的域模型中選擇某些字段，並按域模型中的字段進行分組，然後將結果放入ViewModel中 - 但是，我可以'不要讓Linq語法正確。

我的型號是：

public class Offer 
{ 
    public int OfferId { get; set; } 
    public string Inclusions { get; set; } 
    public string Property { get; set; } 
    public bool IncludeInOffer { get; set; } 
    public Guid guid { get; set; } 
    public int NumPeople { get; set; } 
    public int NumNights { get; set; } 
    public DateTime ArrivalDate { get; set; } 
    public string CustomerName { get; set; } 
    public string EmailAddress { get; set; } 
    public DateTime OfferCreatedOn { get; set; } 
    public string Email { get; set; } 
    public string OfferReference { get; set; } 

    } 

我的視圖模型爲：

public class OfferVMList 
{ 
    public string guid { get; set; } 
    public int NumPeople { get; set; } 
    public int NumNights { get; set; } 
    public DateTime ArrivalDate { get; set; } 
    public string CustomerName { get; set; } 
    public string EmailAddress { get; set; } 
    public DateTime OfferCreatedOn { get; set; } 
    public string Email { get; set; } 
    public string OfferReference { get; set; } 
} 

我的LINQ是：

OfferVMList item = db.Offers 
     .GroupBy(x => x.OfferReference) 
     .Select(ct => new OfferVMList 
     { 
      NumPeople = ct.NumPeople   
     }) 
     .OrderBy(x => x.ArrivalDate); 

但是，該錯誤信息是：

System.Linq.IGrouping<string,FGBS.Models.Offer>' does not contain a definition for 'NumPeople' and no extension method 'NumPeople' accepting a first argument of type 'System.Linq.IGrouping<string,FGBS.Models.Offer>' could be found (are you missing a using directive or an assembly reference?)「

任何人都可以看到我要去哪裏錯了嗎？

謝謝

Answer 1

檢查：

var item = db.Offers 
     .OrderBy(x => x.ArrivalDate); 
     .GroupBy(x => x.OfferReference) 
     .Select(ct => ct.Select(x => new OfferVMList { 
      NumPeople = x.NumPeople 
     });