將域模型類型的數據綁定到ViewModel類型

Question

我很難弄清楚如何將數據從數據庫綁定到ViewModel。基本上，我有一個領域模型，我發現有太多的屬性，我想減少，所以邏輯上我選擇了ViewModel來做到這一點。

領域模型（從數據庫中自動創建）：

public partial class Ticket 
{ 
    public Ticket() 
    { 
     this.Daily = new HashSet<Daily>(); 
     this.Ticket1 = new HashSet<Ticket>(); 
    } 

    public int idTicket { get; set; } 
    public Nullable<int> idNadredeniTicket { get; set; } 
    public short RedniBroj { get; set; } 
    public int idFirma { get; set; } 
    public Nullable<int> idKontakt { get; set; } 
    public Nullable<int> idManager { get; set; } 
    public string Tip { get; set; } 
    public string Status { get; set; } 
    public Nullable<System.DateTime> DatumPrijave { get; set; } 
    public string VrstaPrijave { get; set; } 
    public string Prioritet { get; set; } 
    public Nullable<System.DateTime> DatumDo { get; set; } 
    public string Opis { get; set; } 
    public string Biljeske { get; set; } 
    public Nullable<bool> Zatvoren { get; set; } 
    public Nullable<bool> IzdanRacun { get; set; } 
    public Nullable<System.DateTime> DatumZatvaranja { get; set; } 
    public Nullable<int> idAsset { get; set; } 

    public virtual ICollection<Daily> Daily { get; set; } 
    public virtual Firma Firma { get; set; } 
    public virtual Kontakt Kontakt { get; set; } 
    public virtual Kontakt Kontakt1 { get; set; } 
    public virtual ICollection<Ticket> Ticket1 { get; set; } 
    public virtual Ticket Ticket2 { get; set; } 
} 

視圖模型：

public class OpenTickets 
{ 
    public int idTicket { get; set; } 
    public Nullable<int> idNadredeniTicket { get; set; } 
    public short RedniBroj { get; set; } 
    public int idFirma { get; set; } 
    public Nullable<int> idKontakt { get; set; } 
    public Nullable<int> idManager { get; set; } 
    public string Tip { get; set; } 
    public string Status { get; set; } 
    public Nullable<System.DateTime> DatumPrijave { get; set; } 
    public string VrstaPrijave { get; set; } 
    public string Prioritet { get; set; } 
    public string Opis { get; set; } 
    public string Biljeske { get; set; } 

    public string BrojTicketa 
    { 
     get 
     { 
      return idNadredeniTicket.ToString() + "-" + RedniBroj.ToString(); 
     } 
    } 
    public string NazivTicketa 
    { 
     get 
     { 
      return BrojTicketa + " - " + Opis; 
     } 
    } 
    public string DetaljiTicketa 
    { 
     get 
     { 
      return Opis + "\r\n" + Biljeske; 
     } 
    } 
} 

我想做到的是從通過查詢數據庫中的數據綁定到ViewModel，但是，理解，我得到關於傳遞給視圖的不同類型的對象的錯誤。我正在發佈控制器和視圖以供參考。

控制器

public ActionResult OpenTickets() 
    { 
     var openTickets = db.Ticket 
      .Where(t => t.idFirma == 1) 
      .Where(t => t.Zatvoren == false); 

     return View(openTickets.ToList()); 
    } 

視圖（一些代碼故意中省略爲簡潔起見）

@model IEnumerable<IDE3_CRM.ViewModels.OpenTickets> 

<table> 
    @foreach (var item in Model) 
    { 
     <tr> 
      <td>@Html.DisplayFor(modelItem => item.Biljeske)</td> 
      <td>@Html.DisplayFor(modelItem => item.Opis)</td> 
     </tr> 
    } 
</table> 

Answer 1

我建議在Repository包裹你的數據庫調用。在這裏，您可以將數據庫對象轉換爲視圖模型。例如：

public ActionResult OpenTickets() 
{ 
    var openTickets = ticketRepo.GetOpenTickets(); 
    return View(openTickets); 
} 

// Implementation of ITicketRepo 
public IEnumerable<OpenTickets> GetOpenTickets() 
{ 
    return db.Ticket 
     .Where(t => t.idFirma == 1 && t.Zatvoren == false) 
     .Select(do => new OpenTickets 
     { 
      // Fill in view model properties from database object 
     }); 
} 

Answer 2

Hrvach，

您可以限制在視圖本身的數據字段，我想，也許更有效。話雖這麼說這裏是另一種方法，你可以採取：

1. 創建類型OpenTickets列表
2. 選擇要
3. 循環票在選定的門票，並添加新openTicket你想要的 性質在保持到openTickets名單

4. 回程OPEN票

   public ActionResult OpenTickets() 
   { 
   
   
       List<OpenTickets> openTicketList = new List<OpenTickets>();//create a list of openTickets 
   
       var Tickets = db.Ticket//select the tickets that you want 
        .Where(t => t.idFirma == 1) 
        .Where(t => t.Zatvoren == false); 
   
       foreach (var ticket in Tickets)//Loop over the tickets and create an openTicket out of each ticket then add the openTick to the openTicketList 
       { 
        OpenTickets openTicket = new OpenTickets();//create new OpenTickets object 
        openTicket.propery1 = ticket.propery1;//set each property of the openTicket equal to the property of the Ticket that you want to keep 
        openTicket.propery2 = ticket.propery2; 
        openTicket.propery3 = ticket.propery3; 
        openTicket.propery4 = ticket.propery4; 
        openTicketList.Add(openTicket);//add new OpenTickets object to the list 
       } 
       return View(openTicketList); 
   } 
   

名單3210

我希望這可以幫助...最好的祝願 條例草案