從gridview數據源丟失字段？

Question

我正在加載一個gridview的對象列表，我無法調用aspx頁面上的一些嵌套屬性。我知道列表包含它們，並且可以返回它們，因爲我使用了打印方法來調用有問題的幾個屬性。具體細節：提交對象包含嵌套對象Cust，Bro和SubCoverage，每個對象都有自己的屬性，我將它們存儲在列表中並嘗試調用GridView。提交對象本身的屬性顯示正常，但是當我調用Cust對象的CustName1屬性時，它是「在所選數據源上未找到字段」。由於我知道數據在那裏，並且可以通過代碼隱藏中的其他方法調用，所以我假設它是一種簡單的語法，但是我已經嘗試了足夠多的迭代來讓我懷疑是否有某些我錯過了。它是什麼？下面的代碼：

//提交類/對象：

public class Submission 
{ 

    private int SubmissionId; 

    public int SubmissionId1 
    { 
     get { return SubmissionId; } 
     set { SubmissionId = value; } 
    } 

    private string Status; 

    public string Status1 
    { 
     get { return Status; } 
     set { Status = value; } 
    } 

    private string StatusComment; 

    public string StatusComment1 
    { 
     get { return StatusComment; } 
     set { StatusComment = value; } 
    } 


    private List<Product> Products = new List<Product>(); 

    public List<Product> Products1 
    { 
     get { return Products; } 
     set { Products = value; } 
    } 

    private Customer Cust; 
    public Customer _Cust 
    { 
     get { return Cust; } 
     set { Cust = value; } 
    } 
    private Broker Bro; 
    public Broker _Bro 
    { 
     get { return Bro; } 
     set { Bro = value; } 
    } 


    private SubmissionCoverage Subcov; 

    public SubmissionCoverage _SubCov 
    { 
     get { return Subcov; } 
     set { Subcov = value; } 
    } 

    public Submission() 
    { 
     Cust = new Customer(); 
     Bro = new Broker(); 
     Subcov = new SubmissionCoverage(); 
    } 
} 

//一個嵌套對象類，顧客：

public class Customer 

{

private int CustId; 

public int CustId1 
{ 
    get { return CustId; } 
    set { CustId = value; } 
} 


private string CustName; 

public string CustName1 
{ 
    get { return CustName; } 
    set { CustName = value; } 
} 


private string CustAddress; 

public string CustAddress1 
{ 
    get { return CustAddress; } 
    set { CustAddress = value; } 
} 


private string CustState; 

public string CustState1 
{ 
    get { return CustState; } 
    set { CustState = value; } 
} 

private string CustCity; 

public string CustCity1 
{ 
    get { return CustCity; } 
    set { CustCity = value; } 
} 


private int CustZip; 

public int CustZip1 
{ 
    get { return CustZip; } 
    set { CustZip = value; } 
} 

private int SicNaic; 

public int SicNaic1 
{ 
    get { return SicNaic; } 
    set { SicNaic = value; } 
} 

}

//查詢/列表da Ta層：

Submission tempSubmission = new Submission(); 
     while (dr.Read()) 
     { 
      tempSubmission = new Submission(); 
      tempSubmission.SubmissionId1 = dr.GetInt32(0); 
      tempSubmission._Cust.CustName1 = dr.GetString(1); 
      tempSubmission._Cust.CustCity1 = dr.GetString(2); 
      tempSubmission._Cust.CustState1 = dr.GetString(3); 
      tempSubmission._Bro.BroName1 = dr.GetString(4); 
      tempSubmission._Bro.BroState1 = dr.GetString(5); 
      tempSubmission._Bro.Entity1 = dr.GetString(6); 
      tempSubmission._SubCov.Coverage1 = dr.GetInt32(7); 
      tempSubmission.Status1 = dr.GetString(8); 

      lstSubmission.Add(tempSubmission); 

     } 
     return lstSubmission; 
    } 

}

// GridView的代碼：

<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="false" EmptyDataText="There are no data records to display." AllowPaging="True" 
    BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px" 
    CellPadding="3" GridLines="Vertical" HorizontalAlign="Center" 
    AllowSorting="True" > 
    <AlternatingRowStyle BackColor="#DCDCDC" /> 
<Columns> 

     <asp:BoundField DataField="SubmissionId1" HeaderText="Submission Id" 
      SortExpression="SubmissionId1" > 
     </asp:BoundField> 
     <asp:BoundField DataField="_Cust.CustName1" HeaderText="Customer" 
      SortExpression="tempsub._Cust.CustName1" /> 
     <asp:BoundField DataField="CustCity1" HeaderText="Customer City" 
      SortExpression="CustCity1" /> 
     <asp:BoundField DataField="CustState1" HeaderText="Customer State" 
      SortExpression="CustState1" /> 
     <asp:BoundField DataField="BroName1" HeaderText="Broker" 
      SortExpression="BroName1" /> 
     <asp:BoundField DataField="BroState1" HeaderText="Broker State" 
      SortExpression="BroState1" /> 
     <asp:BoundField DataField="Entity1" HeaderText="Entity Type" 
      SortExpression="Entity1" /> 
     <asp:BoundField DataField="Coverage" 
      HeaderText="Coverage" SortExpression="Coverage" 
      DataFormatString=" {0:c}" /> 
     <asp:BoundField DataField="Status1" HeaderText="Status" 
      SortExpression="Status1" /> 

     <asp:HyperLinkField DataNavigateUrlFields="SubmissionId" 
      DataNavigateUrlFormatString="View.aspx?SubmissionId={0}" Text="View" 
      HeaderText="View" /> 
     <asp:HyperLinkField DataNavigateUrlFields="SubmissionId" 
      DataNavigateUrlFormatString="ViewEdit.aspx?SubmissionId={0}" HeaderText="Edit" 
      Text="Edit" /> 

    </Columns> 

</asp:GridView> 

//最後，在證明了表示層的印刷方法，我不是瘋了：

SubmissionService ss = new SubmissionService(); 
    List<Submission> SubmissionsList = ss.getAllSubmission(); 


    GridView2.DataSource = SubmissionsList; 
    GridView2.DataBind(); 

    Submission tempsub = SubmissionsList.First(); 
    Response.Write("Printing temp:" + tempsub._Cust.CustName1 + " total count is:" + SubmissionsList.Count()); // *This returns the correct data for whichever field I specify.* 

Answer 1

試試看這裏：

http://www.dailycode.info/Blog/post/2009/01/11/ASPNet-GridView-databinding-a-subobject.aspx

在這個崗位的關鍵是使用一個TemplateField帶有標籤：

<asp:TemplateField HeaderText="Stock location description"> 
<ItemTemplate> 
    <asp:Label ID="lblCRCID" runat="server" 
    Text='<%# ((Namespace.TestStock)(Container.DataItem)).StockLocation.Description %>'> 
    </asp:Label> 
    </ItemTemplate> 
</asp:TemplateField> 
<asp:BoundField DataField="Description" HeaderText="Stock descrioption" /> 

HTH