根据ASP.NET MVC中的用户登录填写下拉列表国家/地区

Question

我想将基于typedef void (*keyCallback)(int); typedef void (*emitterCallback)(void*); static void registerOnKeyDown(keyCallback cb) { emitter_subscribe(keyDownEmitter, (emitterCallback)cb); } 的{​​{1}} dropdownlist填入我的申请表中。如果用户未登录，则将显示默认国家/地区。请帮助我并指导我如何根据用户登录国家/地区填写下拉列表。任何帮助都非常感谢。

AspUsers table -- When user register, all the information goes to this table

我的countries数据模型

User login

我的LeadingClass查看模型

 public int? Type { get; set; }   
   public string Country { get; set; }

我的LeadingFilterVM

 public int? Type { get; set; }
 public IEnumerable<SelectListItem> TypeList { get; set; }    
  public string Country { get; set; }
 public IEnumerable<SelectListItem> CountriesList { get; set; }
 public IPagedList<LeadingClass> Leadings { get; set; }

我的LeadingDatabaseHandle控制器

public List<LeadingClass> LeadingBasedonFilter(int? Type, string Country = "")
        {
            clsUtilities clsUtilities = new clsUtilities();
            DataSet ds;
            List<LeadingClass> leadingClass = new List<LeadingClass>();
            string sSQL;
            SqlParameter[] prms = new SqlParameter[3];
            sSQL = "exec GetLeeading @Type,@country";
            prms[0] = new SqlParameter("@Type", SqlDbType.Int);
            prms[0].Value = Sire;
            prms[1] = new SqlParameter("@Country", SqlDbType.VarChar);
            prms[1].Value = Country;
            ds = clsUtilities.CreateCommandwithParams(sSQL, prms);
            DataTable dataTable = ds.Tables[0];
            foreach (DataRow dr in dataTable.Rows)
            {
                leadingClass.Add(
                    new LeadingClass
                    {
                        Id = Convert.ToInt32(dr["Id"]),
                        Name= Convert.ToString(dr["Name"]),

                    }
                    );
            }

            return leadingClass;
        }

我的Home查看

[HttpGet]
        public ActionResult Leading(int? type, string country,int? pageNumber)
        {

            LeadingDatabaseHandle leadingDatabaseHandle = new LeadingDatabaseHandle();
           IEnumerable<LeadingClass> data;

            if (type!=null)
            {

                data = leadingDatabaseHandle.LeadingBasedonFilter(type.Value, country);
            }
            else
            {
               data = leadingDatabaseHandle.LeadingSiresAll();
            }
            LeadingFilterVM model = new LeadingFilterVM
            {
                Type = type,
                Country = country,

                TypeList = new List<SelectListItem>
            {
            new SelectListItem{ Text = "General", Value = "1" },
            new SelectListItem{ Text = "Advance", Value = "2" },
            },
                CountriesList = new List<SelectListItem>
            {
              new SelectListItem {Value = "NZ", Text="New Zealand" },
              new SelectListItem {Value = "AUS", Text = "Australia" },
              new SelectListItem {Value = "FR", Text = "France" },
              new SelectListItem {Value = "GB", Text = "Great Britain" },

            },


               Leadings = data.ToPagedList(pageNumber ?? 1, 10)

            };
            return View(model);
        }