傳遞來自控制器的查詢數據以查看

Question

我一直在這個問題上停留太久，會愛上一些幫助。

在視圖中，人們可以從兩個單選按鈕列表中選擇兩個項目，這兩個項目通過FormMethod.Get返回到HomeController中的Index事件。

這兩個值'parts'和'use'被查詢以返回一個結果，並通過viewbag傳遞迴視圖。然而viewbag在視圖中返回一行，如{Item = Kona，Price = 400.0000，Quantity = 2}。

鑑於我想返回item.Item，Item.Price等每個項目，所以我可以單獨使用它們。

我已經嘗試了一切，我可以找到無濟於事。 匿名類項目也拋出紅色錯誤

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

使用視圖模型類來保存查詢結果，並傳回給視圖。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 /> 
}