从控制器asp.net中的给定ID获取数据mvc

Question

我需要从数据库中获取一个字符串，在我的案例中添加业务时将其保存到该数据库中。我可以通过下面的代码，将其保存到数据库中的业务控制器

[HttpPost] 
    [ValidateAntiForgeryToken] 
    public ActionResult Create([Bind(Include = "ID,Title,Address,Category,Description,Latitude,Longitute,Owner")] Business business) 
    { 
     business.Owner = System.Web.HttpContext.Current.User.Identity.Name;//I'm saving the current user as the owner 
     if (ModelState.IsValid) 
     { 
      db.Businesses.Add(business); 
      db.SaveChanges(); 
      return RedirectToAction("Index"); 
     } 

     return View(business); 
    } 

现在，所有我需要的是检查当前用户的用户是否是被添加业务时，保存在模型中的业务所有者如上面的代码所示。模型类低于

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

namespace WebPortal.Models 
{ 
    public class Business 
    { 
     public int ID { get; set; } 
     public string Title { get; set; } 
     public string Address { get; set; } 
     public string Category { get; set; } 
     public string Description { get; set; } 
     public double Latitude { get; set; } 
     public double Longitude { get; set; }  
     public string Owner { get; set; }//in order to detect the original creator of the businness 
    } 
} 

的节省部分工作正常，这里的是我试图把它的业务控制器

// GET: Businesses/Edit/5 
    [Authorize] 
    public ActionResult Edit([Bind(Include = "ID,Title,Address,Category,Description,Latitude,Longitute,Owner")] int? id, string ownerr, Business business) 
    { 
     Business bs = new Business(); 
     //Authorizing Edit permission only for the owner of the business and the admin 
     if (!((System.Web.HttpContext.Current.User.Identity.Name == bs.Owner 
       || User.Identity.Name == "admin@gmail.com"))) 
     { 
      return View(db.Businesses.ToList()); 
     } 

它还挺wronge获取代码。我只需要知道通过传递也许是ID如何获取企业的relavent所有者...

编辑

ID可以通过以下HTML获取和我正在试图通过owner以及但是它在控制器返回一个空

{ 
      @Html.ActionLink("| Edit | ", "Edit", new { id = item.ID, owner = item.Owner }) 
      @Html.ActionLink("Delete", "Delete", new { id = item.ID }) 
     } 

Answer 1

我一般都身份标识模型的Id和我使用ApplicationUserManager查询数据库为当前登录用户

private ApplicationUserManager _userManager; 
      public ApplicationUserManager UserManager 
     { 
      get 
      { 
       return _userManager ?? HttpContext.GetOwinContext().GetUserManager<ApplicationUserManager>(); 
      } 
      private set 
      { 
       _userManager = value; 
      } 
     } 


var user = UserManager.FindById(User.Identity.GetUserId()); 
var userId = Guid.Parse(user.Id); 

var _context = new MessageContext();    
var myContacts = _context.Contacts.Where(c => c.CustomerId == userId).ToList(); 
       ViewBag.Contacts = myContacts;