在模型绑定的Listview中对外键列进行排序

我使用Listview来显示一些使用模型绑定的数据，并尝试对Listview中与数据源中的外键列（即book列）相关的列进行排序

数据模型如下：

public class Book 
{
    public Book() {
        this.Factions = new HashSet<Faction>();
    }

    public int Id { get; set; }
    [Required]
    [MaxLength(50)]
    public string Title { get; set; }

   public virtual ICollection<Faction> Factions { get; set; }
}

public class Faction 
{    
    public int Id { get; set; }
    [Required]
    [MaxLength(50)]
    public string Name { get; set; }
    [MaxLength(10)]
    public string Abbreviation { get; set; }

    public int? BookId { get; set; }
    public virtual Book Book { get; set; }
}

公共课堂教材
{
公共书籍（）{
this.派系=新HashSet（）；
}
公共int Id{get；set；}
[必需]
[MaxLength（50）]
公共字符串标题{get；set；}
公共虚拟ICollection派系{get；set；}
}
公共阶级派系
{    
公共int Id{get；set；}
[必需]
[MaxLength（50）]
公共字符串名称{get；set；}
[MaxLength（10）]
公共字符串缩写{get；set；}
public int？BookId{get；set；}
公共虚拟图书{get；set；}
}

这是显示ListItem标题的HTML

<asp:ListView ID="FactionListView" runat="server"
ItemType="DCW.Models.Faction" DataKeyNames="Id"
SelectMethod="FactionGetData"
<LayoutTemplate>
    <table class="table table-hover table-bordered">
        <thead>
            <tr>
               <th>
                    <asp:LinkButton ID="FactionListViewName" runat="server" CommandName="Sort"
                        CommandArgument="Name">Name</asp:LinkButton></th>
                <th>
                    <asp:LinkButton ID="FactionListViewAbbreviation" runat="server" CommandName="Sort"
                        CommandArgument="Abbreviation">Abbreviation</asp:LinkButton></th>
                <th>
                    <asp:LinkButton ID="FactionListViewBook" runat="server" CommandName="Sort"
                        CommandArgument="Book">Book</asp:LinkButton></th>
            </tr>
        </thead>
        <tbody>
            <asp:PlaceHolder ID="itemPlaceholder" runat="server" />
        </tbody>
    </table>
</LayoutTemplate>

---

因此，模型绑定似乎无法处理开箱即用的导航属性（外键）排序。我发现以下是我用来解决这个问题的方法：

因此：

<asp:LinkButton ID="FactionListViewBook" runat="server" CommandName="Sort"
                    CommandArgument="Book">Book</asp:LinkButton></th>


<asp:LinkButton ID="FactionListViewBook" runat="server" CommandName="Sort"
                    CommandArgument="Book.Title">Book</asp:LinkButton></th>

public IQueryable<GameFaction> FactionGetData(string sortByExpression)
    {
        IQueryable<Faction> query = _context.Factions.Include(faction => faction.Book);

        sortByExpression = sortByExpression == null ? "Name" : sortByExpression;
        if (sortByExpression.EndsWith(" DESC"))
        {
            query = query.OrderByDescending(sortByExpression.SubString(0, sortByExpression.Length - 5));
        }
        else
        {
            query = query.OrderBy(sortByExpression);
        }

        return query;
    }