GridView数据源中缺少字段？

问题描述

| 我正在加载带有对象列表的gridview，但无法调用aspx页面上的某些嵌套属性。我知道列表包含它们，并且可以返回它们，因为我已经使用了print方法来调用有问题的几个属性。具体细节：提交对象包含嵌套对象Cust，Bro和SubCoverage，它们每个都有自己的属性，我将它们存储在列表中并尝试调用gridview。 Submission对象本身的属性显示得很好，但是当我调用Cust对象的CustName1属性时，它的\“在所选数据源上找不到字段\”。由于我知道数据存在，并且可以被后面的代码中的其他方法调用，因此我假设它是一种简单的语法，但是我已经尝试了足够的迭代以使我怀疑是否存在某些东西不见了。它是什么？代码如下： //提交类/对象：

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();
    }
}

//客户之一的嵌套对象类：

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; }
}

} //查询/列表数据层：

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代码：

 <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>

//最后，表示层中的print方法证明我并不疯狂：

 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.*

    

解决方法

        试试看这里： http://www.dailycode.info/Blog/post/2009/01/11/ASPNet-GridView-databinding-a-subobject.aspx 这篇文章中的关键是使用带有标签的TemplateField：

<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\" />

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