Question

我有一个名为GetPrivlidge()的方法，我将在每个控制器中使用它，此方法用于当前记录的用户将看到的内容以及将不会看到的方法

 public void GetPrivlidge()
 {
        string name = System.Web.HttpContext.Current.User.Identity.Name;
        name = EncriptionAndDecription.Encrypt(name);
        int UserId = (from c in db.users where c.Arabicusername == name select c.Usersid).SingleOrDefault();
        SamahyatOfUser S = (from SS in db.SamahyatOfUsers where SS.User_Id == UserId select SS).SingleOrDefault();
        ViewBag.Pri = S;
        string RoleName = (from R in db.Roles where R.User_ID == UserId && R.UserName == name select R.RoleName).SingleOrDefault();
        if (RoleName.Equals(EncriptionAndDecription.Encrypt("Admin")))
        {
            ViewBag.ADMIN = true;
        }
        else
        {
            ViewBag.ADMIN = false;
        }
 }

我使用ViewBag.Pri检查布局是否有权限，我必须在每个动作中发送此ViewBag所以我决定制作具有所有常用方法的控制器这是我的控制器

 public class AllRequiredDataController : Controller
 {
    //
    // GET: /AllRequiredData/
    mts_exchangeEntities db = new mts_exchangeEntities();
    //this Method is used in privlidge that make user do thing and dont make anthor thing (Do or not Do)
    #region privlidge_Data
    public void GetPrivlidge()
    {
        string name = System.Web.HttpContext.Current.User.Identity.Name;
        name = EncriptionAndDecription.Encrypt(name);
        int UserId = (from c in db.users where c.Arabicusername == name select c.Usersid).SingleOrDefault();
        SamahyatOfUser S = (from SS in db.SamahyatOfUsers where SS.User_Id == UserId select SS).SingleOrDefault();
        ViewBag.Pri = S;
        string RoleName = (from R in db.Roles where R.User_ID == UserId && R.UserName == name select R.RoleName).SingleOrDefault();
        if (RoleName.Equals(EncriptionAndDecription.Encrypt("Admin")))
        {
            ViewBag.ADMIN = true;
        }
        else
        {
            ViewBag.ADMIN = false;
        }
    }
    #endregion
}

并在_layOut我接受此ViewBag并为其制作演员并使用特权

FinalMts.Models.SamahyatOfUser S = (FinalMts.Models.SamahyatOfUser)ViewBag.Pri;

并在操作中我创建Controller对象并调用方法GetPrivlidge() 就像这个

 AllRequiredDataController Required = new AllRequiredDataController();
    public ActionResult AddCurrencyPrices()
    {
        //get privlidg Data
        Required.GetPrivlidge();
        return View();
    }

但layout看不到ViewBag.Pri，错误消息说

对象引用未设置为对象的实例。

这个控制器看不到ViewBag如果是，我该怎么办才能处理这个ViewBag？

Answer 1

每个控制器都有自己的ViewBag。更好的方法是继承您的控制器表单AllRequiredDataController并使用这种方式

class Controller1 : AllRequiredDataController
{
    public ActionResult AddCurrencyPrices()
    {
        //get privlidg Data
        GetPrivlidge();
        return View();
    }
}

我可以将ViewBag从控制器发送到MVC中的另一个控制器吗？

1 个答案: