Viewbag获得空值

问题描述

我有两个Controller ResultController和HomeController。 从结果控制器的索引ActionResult中，我正在通过ViewBag将参数值传递给视图

public IActionResult Index(string listingType,string location,string viewType,[FromQuery] SearchModel searchModel)
        {
            SearchQuery model = new SearchQuery(searchModel,location,this.cacheService);
            var locationList = this.searchFactory.GetSearchService(model.ListingType).GetSearchResults(model,listingType);
            ViewBag.listingType = listingType;
            ViewBag.location = location;
            ViewBag.viewType = viewType;
            ViewBag.searchModel = searchModel;
            return View(locationList);
        } 

现在In View通过viewbag接收值，并将值传递给Homecontroller的PropertyDetails

@Html.ActionLink(linkText: "Comfortable Apartment in Palace","PropertyDetails","Home",new { ListingId = pl.ListingId,listingType= ViewBag.listingType,location= ViewBag.location,viewType= ViewBag.viewType,searchModel= ViewBag.searchModel },null)

在Homecontroller的PropertyDetails中

public IActionResult PropertyDetails(string listingType,[FromQuery] SearchModel searchModel,int ListingId)
        {
            SearchQuery model = new SearchQuery(searchModel,listingType);
            var result = locationList.SalesList.FirstOrDefault(s=>s.ListingId==ListingId);
            return View(result);
        }

在PropertyDetails中，我获取了viewbag传递的所有参数值，但是searchmodel参数为null。有人可以告诉我为什么我在searchmodel中获取null 参数？还有传递值的替代方法吗？

Searchmodel类

public class SearchModel
    {
        public string PI { get; set; }
        public string SIMP { get; set; }
        public string L { get; set; }
        public string S { get; set; }
        public int[] LocationId;
    } 

解决方法

@{
    var LocationId = (new int[] { 1,2,3 });
}
@Html.ActionLink("Comfortable Apartment in Palace","PropertyDetails","Home",new { ListingId = 1,listingType = 2,location = 3,viewType = 4,L = "L",PI = "PI",S = "S",SIMP = "SIMP",Locations = string.Join(",",LocationId) },null)

SearchModel类

public class SearchModel
    {
        public string PI { get; set; }
        public string SIMP { get; set; }
        public string L { get; set; }
        public string S { get; set; }
        public int[] LocationId;
        public string Locations { get; set; }
    }

正确：

new {  L = "L",SIMP = "SIMP" }

错

 new { searchModel= ViewBag.searchModel }