如何将这些多个查询结果传递给MVC中的视图？

Posted 2021-05-04

我是编程新手，我有一个数据库，记录插入我创建的物理设备的硬币。我试图找出每个硬币值出现在数据库中的次数，并在视图中显示这些值。如何将这些值传递到视图中并检索它们。

 EasyAspIMvc_dbEntities1 db = new EasyAspIMvc_dbEntities1();
        public ActionResult Index()
        {
            var TenCentCoinsCount = (from e in db.GraphDatas where e.CoinValue == "0.10" select e).Count();
            var TwentyCentCoinsCount = (from e in db.GraphDatas where e.CoinValue == "0.20" select e).Count();
            var FiftyCentCoinsCount = (from e in db.GraphDatas where e.CoinValue == "0.50" select e).Count();
            var EuroCoinCOunt = (from e in db.GraphDatas where e.CoinValue == "1.00" select e).Count();
            var TwoEuroCoinCount = (from e in db.GraphDatas where e.CoinValue == "2.00" select e).Count();

return View()
         }

答案

在您的控制器中，您可以为每个硬币创建一个ViewBag。所以：

ViewBag.TenCentCoinsCount = (from e in db.GraphDatas where e.CoinValue == "0.10" select e).Count();

等等

在您的视图中，您将检索所有ViewBag，如​​下所示：

<table>
<tr><td>TenCentCoinsCount </td><td> @ViewBag.TenCentCoinsCount</td></tr>
<tr><td>TwentyCentCoinsCount </td><td> @ViewBag.TwentyCentCoinsCount </td></tr>
</table>