Linq to Entity |通過表加入模型

Question

一天的美好時光！

我在控制器查詢MVC項目：

var getPhotos = (from m in db.photos 
    join n in db.comments on m.id equals n.photoid 
    where n.ownerName == User.Identity.Name 
    orderby n.id descending 
    select new { 
     m.imgcrop, m.id, 
     n.commenterName, n.comment 
    }).Take(10); 

如何通過這個查詢，查看模型，該模型來查看。

花費整晚找到的例子，但不能。感謝幫助！

修訂 全部模型類

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 

namespace photostorage.Models 
{ 
    public class GlobalModel 
    { 
     public class PhotoViewModel 
     { 
      public photos Photos { get; set; } 
      public profiles Profile { get; set; } 
      public IQueryable<comments> Comments { get; set; } 
      public IQueryable<photos> NextPrev { get; set; } 
     } 

     public class UserPhotoList 
     { 
      public IQueryable<photos> Photos { get; set; } 
      public profiles Profile { get; set; } 
     } 

     public class UserProfileView 
     { 
      public IQueryable<photos> Photos { get; set; } 
      public profiles Profile { get; set; } 
     } 

     public class GetLastComments 
     { 
      public IQueryable<photos> uPhoto { get; set; } 
      public IQueryable<comments> uComments { get; set; } 
     } 
    } 
} 

控制器：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Mvc; 
using photostorage.Models; 

namespace photostorage.Controllers 
{ 
    public class HomeController : Controller 
    { 
     private photostorageEntities db = new photostorageEntities(); 

     public ActionResult Index() 
     { 
      if(Request.IsAuthenticated) { 
       GlobalModel.GetLastComments model = new GlobalModel.GetLastComments(); 
       var getPhotos = (from m in db.photos 
            join n in db.comments on m.id equals n.photoid 
            where n.ownerName == User.Identity.Name 
            select new { 
             m.imgcrop, m.id, 
             n.commenterName, n.comment 
            }).Take(10); 
       return View("Index_Auth", model); 
      }else{ 

       ViewBag.Message = "Welcome to ASP.NET MVC!"; 
       return View("Index"); 
      } 
     } 

     public ActionResult About() 
     { 
      return View(); 
     } 
    } 
} 

Answer 1

在這種情況下，你就可以說只有通過你的看法，而不是由所使用的「視圖模式」其餘的應用程序。像下面這樣：

public class CommentsViewModel 
{ 
    public int MessageId { get; set; } 
    public string ImageCrop { get; set; } 
    public string CommenterName { get; set; } 
    public string Comment { get; set; } 
} 

然後更改您的查詢，像這樣：

var getPhotos = (from m in db.photos 
    join n in db.comments on m.id equals n.photoid 
    where n.ownerName == User.Identity.Name 
    orderby n.id descending 
    select new CommentsViewModel { 
     ImageCrop = m.imgcrop, 
     MessageId = m.id, 
     CommenterName = n.commenterName, 
     Comment = n.comment 
    }).Take(10).ToList(); 

讓您的視圖強類型的新類和數據傳遞給它，像這樣：

View("name_of_your_view", getPhotos); 

Answer 2

如果你想這樣做，就像你有：

var getPhotos = (from m in db.photos 
           join n in db.comments on m.id equals n.photoid 
           where n.ownerName == User.Identity.Name 
           select new { 
            m.imgcrop, m.id, 
            n.commenterName, n.comment 
           }).Take(10); 

其實你可以有這個，而無需創建一個新的「CommentsViewModel」，只是用什麼應該是現有的表和模式：

var getPhotos = (from m in db.Photos 
           join n in db.Comments on m.Id equals n.PhotoId 
           where n.OwnerName == User.Identity.Name 
           select new { 
            ImageCrop = m.ImageCrop, 
            Id = m.Id, 
            CommenterName = n.CommenterName, 
            Comment = n.Comment 
           }).Take(10); 

該機型將像這些例子，如果你有一個外鍵關係在Photo.Id到Comments.PhotoId：

public class Photos 
{ 
    public int Id { get; set; } 
    public string ImageCrop { get; set; } 

    [ForeignKey("PhotoId")] 
    public virtual Comments Comment { get; set; } 
} 
public class Comments 
{ 
    public int Id { get; set; } 
    public int PhotoId { get; set; } 
    public string CommenterName { get; set; } 
    public string OwnerName { get; set; } 
    public string Comment { get; set; } 
} 

剛一說明：你在你的問題中顯示的車型有沒有這些列的，但你正在建立對他們的查詢。最好記得在尋求幫助時給出一個完整的圖片。