Question

我长期以来一直坚持这个问题并且会喜欢一些帮助。

在视图中，人们可以从两个radiobutton列表中选择两个项目，这两个项目通过FormMethod.Get返回到HomeController中的Index事件。

查询这两个值'parts和'use'以返回结果，并通过viewbag将其传递回视图。然而，viewbag在视图中返回{Item = Kona，Price = 400.0000，Quantity = 2}这样的行。

虽然我想返回item.Item，Item.Price等每个项目，但我可以单独使用它们。

我已经尝试了一切我无法找到的东西。匿名类项也会抛出红色错误

查看

foreach(var item in ViewBag.getstock)
{ //Show it and then make a new line with the <BR/>
    @item < br / >
    //{ Item = Kona, Price = 400.0000, Quantity = 2 } 
}

的HomeController

 public ActionResult Index()
 {
     //this returns the entire query string
     ViewBag.querystring = Request.QueryString;

     //if any keys are in the url from the view
     if (Request.QueryString.HasKeys())
     {
         //extract them out so that you can use them
         //key = the name such as Part or Use it goes Key & Value this is passed to a Viewbag
         //get(o) is getting the value at place 0, the first value in the url

         ViewBag.querystringvalue0 = Request.QueryString.Get(0);
         ViewBag.querystringvalue1 = Request.QueryString.Get(1);
     }

     //if there is any query string
     if (Request.QueryString.HasKeys())
     {
         //pass the data to a couple of variables,
         var parts = Request.QueryString.Get(0);
         var use = Request.QueryString.Get(1);

         //put them in a new query and return the results
         ViewBag.getstock = from p in Bikeshopdb.Stocks
         where p.PartName == parts && (p.Road == use || p.Mtn == use || p.Hybrid == use) select new
         {
             p.Item, p.Price, p.Quantity
         };

     }
     return View(Bikeshopdb.Stocks.ToList());

Answer 1

使用ViewModel类保存查询结果并传回视图。例如：

的HomeController

public class MatchingStock()
{

    public int ID { get; set; }
    public string Item { get; set; }
    public int Price { get; set; }
    public int Quantity { get; set; }

}

public ActionResult Index()
{

    //...

    var list = 
        (from p in Bikeshopdb.Stocks
        where p.PartName == parts && 
            (p.Road == use || p.Mtn == use || p.Hybrid == use)
        select new MatchingStock() { 
            ID = p.ID, 
            Item = p.Item, 
            Price = p.Price, 
            Quantity = p.Quantity}).ToList();

    ViewBag.getstock = list;

    //...

}

查看

@foreach (var item in (List<MatchingStock>)ViewBag.getstock)
{
    @item.Item @item.Price @item.Quantity
    <br />
}

将查询数据从控制器传递到视图

1 个答案: