不能将类型'System.Collections.Generic.List <System.Web.Mvc.SelectListItem>'隐式转换为'int？'

Question

里面mvc3应用程序我使用以下查询从数据库填充dropdownlist。 混得Index.cshtml

public mydataEntities1 dbContext = new mydataEntities1(); 

     public List<SelectListItem> GetPricingSecurityID() 
     { 
     var pricingSecurityID = (from m in dbContext.Reporting_DailyNAV_Pricing 
            select new SelectListItem 
             { 
               Text = m.PricingSecurityID.ToString(), 
               Value = m.PricingSecurityID.ToString() 
             }); 

     return pricingSecurityID.ToList(); 
     } 

     public List<SelectListItem> GetCUSIP() 
     { 
      var cusipID = (from m in dbContext.StateStreet_DailyPosition_Second 
            select new SelectListItem 
            { 
             Text = m.CUSIP.ToString(), 
             Value = m.CUSIP.ToString() 
            }); 

      return cusipID.ToList(); 
     } 

Home.controller 
public ActionResult Index() 
     { 
      SecurityIdentifierMapping objModel = new SecurityIdentifierMapping(); 
      objModel.PricingSecurityID = objRepository.GetPricingSecurityID(); 
      objModel.CUSIP = objRepository.GetCUSIP(); 
      return View(objModel); 
     } 

public partial class SecurityIdentifierMapping 
    { 
     public int Id { get; set; } 

     [Required(ErrorMessage = "Please select a PricingSecurityID")] 
     public Nullable<int> PricingSecurityID { get; set; } 

     [Required(ErrorMessage = "Please select a CUSIPID")] 
     public string CUSIP { get; set; } 

     public string Calculation { get; set; } 
    } 

错误试图AsEnumerable()也改变什么？

Answer 1

我不能确定没有看到SecurityIdentiferMapping的定义，但我猜测PricingSecurityID的类型是int?。您正在尝试的GetPricingSecurityID()返回值设置此属性，但该方法的返回值是List<SelectItemList>

更改GetPricingSecurityID()方法返回一个int?或你的财产接受List<SelectItemList>。