SQL语句表显示在asp.net MVC4中

Question

我想创建一个像这样的表

（注意不确定我的sql语句是否正确）

SELECT Category, Count(TicketsIssued)
FROM Category c
LEFT JOIN Tickets t ON c.categoryID = t.categoryID

在下图中左栏是所有类别，右侧是使用相同类别ID发出的票数。 我的问题是如何在C＃中编写它以放入Controllers \ HomeController.cs。

需要更改的代码是Controllers \ HomeController.cs，CategoryGroup.cs和about.cshtml。

在Controllers \ HomeController.cs中查询语句

public ActionResult About()
{
    var data = from category in db.Categories
               group category by category.Title into categoryGroup
               select new CategoryGroup()
               {
                   Title = categoryGroup.Key,
                   CategoryCount = categoryGroup.Count() <-- ***This needs to change into Count of Tickets which have the same category ID***
               };
    return View(data);
}

我希望统计信息显示在Views \ Home \ About.cshtml

上的网页

@model IEnumerable<RecreationalServicesTicketingSystem.ViewModels.CategoryGroup>

@{
    ViewBag.Title = "Ticket Statistics";
}

<h2>Ticket Category Statistics</h2>

<table>
    <tr>
        <th>
            Category
        </th>
        <th>
            Tickets Issued
        </th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Title)         
        </td>
        <td>
            @item.CategoryCount @*Instead of Category Count I want numbers of tickets that have been issued for certain IDs. *@
        </td>
    </tr>
}
</table>

以下代码仅供参考

门票类

namespace RecreationalServicesTicketingSystem.Models
{  
    public enum Priority
    {
        Low,Med,High
    }

    public class Ticket
    {
        public int TicketID { get; set; }
        public int CategoryID { get; set; }
        public int UserID { get; set; }
        public string Issue { get; set; } 
        public Priority? Priority { get; set; }

        public virtual Category Category { get; set; }
        public virtual User User { get; set; }
    }
}

类别类

namespace RecreationalServicesTicketingSystem.Models
{
    public class Category
    {
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        public int CategoryID { get; set; }
        public string Title { get; set; }

        public virtual ICollection<Ticket> Tickets { get; set; }
    }
}

\的ViewModels \ CategoryGroup.cs

namespace RecreationalServicesTicketingSystem.ViewModels
{
    public class CategoryGroup
    {
        public int CategoryID { get; set; }
        public int CategoryCount { get; set; }


        public string Title { get; set; }
    }
}