具有數據綁定的ASP.NET LINQ

Question

我有一些藏書

static public Book[] Books =
    {
      new Book {
        Title="Funny Stories",
        Publisher=Publishers[0],
        Authors=new[]{Authors[0], Authors[1]},
        PageCount=101,
        Price=25.55M,
        PublicationDate=new DateTime(2004, 11, 10),
        Isbn="0-000-77777-2",
        Subject=Subjects[0]
      },
      new Book {
        Title="LINQ rules",
        Publisher=Publishers[1],
        Authors=new[]{Authors[2]},
        PageCount=300,
        Price=12M,
        PublicationDate=new DateTime(2007, 9, 2),
        Isbn="0-111-77777-2",
        Subject=Subjects[0]
      },
      new Book {
        Title="C# on Rails",
        Publisher=Publishers[1],
        Authors=new[]{Authors[2]},
        PageCount=256,
        Price=35.5M,
        PublicationDate=new DateTime(2007, 4, 1),
        Isbn="0-222-77777-2",
        Subject=Subjects[0]
      },
      new Book {
        Title="All your base are belong to us",
        Publisher=Publishers[1],
        Authors=new[]{Authors[3]},
        PageCount=1205,
        Price=35.5M,
        PublicationDate=new DateTime(2006, 5, 5),
        Isbn="0-333-77777-2",
        Subject=Subjects[2]
      },
      new Book {
        Title="Bonjour mon Amour",
        Publisher=Publishers[0],
        Authors=new[]{Authors[1], Authors[0]},
        PageCount=50,
        Price=29M,
        PublicationDate=new DateTime(1973, 2, 18),
        Isbn="2-444-77777-2",
        Subject=Subjects[1]
      }
    };

我有兩個綁定嵌套的GridView（第一個GridView帶有書名，嵌套的GridView顯示作者列表）。

用於選擇標題和作者的Linq查詢為

List<Author> alist=new List<Author>();

var Authors = 
SampleData.Books.Select(c=>new {Title=c.Title,list=c.Authors.ToList() });

GridView1.DataSource = Authors;
GridView1.DataBind();              

HTML代碼是

<asp:GridView ID="GridView1" runat="server"  
        DataKeyNames="Title,list">
        <Columns>
            <asp:TemplateField HeaderText="Authors">
                <ItemTemplate>
                    <asp:GridView ID="GridView2" runat="server"
                     DataSource='<%# Eval("list") %>'>
                    </asp:GridView>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

當同時啟用AutoGeneratedColumns時，如何綁定GridView1和GridView2？

Answer 1

[這是（部分刪除的）評論討論的摘要，以確保問題有答案]

您需要將DataKeyNames="FirstName,LastName" （或調用Author類的任何屬性）添加到GridView2，以便GridView知道應將其綁定到自定義Author類的哪些屬性。