C# id键未显示在listview中

我试图在我的listview中显示DoctorId键字段，它总是显示为空白

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

这是.aspx页面

       <asp:LinqDataSource ID="LinqDataSource1" runat="server" 
         ContextTypeName="AppointementDataContext" EnableDelete="True" EnableInsert="True" 
         EnableUpdate="True" EntityTypeName="" TableName="Appointement" 
            Where="IsAvailable = True && dateApt >= DateTime.Now && doctorId = Doctor.Id &&
                   doctorid = 1"> 

            <WhereParameters>
               <asp:ControlParameter 
                   Name="doctor_name" 
                   ControlID="DropDownList1" 
                   PropertyName="SelectedValue"
                   Type="String" />
             </WhereParameters>

        </asp:LinqDataSource>

       <asp:ListView ID="ListView1" runat="server" DataKeyNames="aptId" 
         DataSourceID="LinqDataSource1" InsertItemPosition="LastItem" >
            <AlternatingItemTemplate>
                <tr style="">
                  <td>
                    <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />
                  </td>
                  <td>
                    <asp:Label ID="DoctorNameLabel" runat="server" 
                          Text='<%# Eval("Doctor.Doctor_Name") %>' />
                  </td>
                  <td>
                     <asp:Label ID="dateAptLabel" runat="server" 
                          Text='<%# Eval("dateApt", "{0:dd/MM/yyyy}") %>' />
                  </td>
                  <td>
                    <asp:Label ID="hourAptLabel" runat="server" 
                        Text='<%# Eval("hourApt", @"{0:hh\:mm}") %>' />
                  </td>

                  <td>
                    <asp:CheckBox id="MyCheckBox" runat="server"
                         value='<%# Eval("aptId") %>'
                         AutoPostBack="true"
                         OnCheckedChanged="Check_Clicked" />
                 </td>
                </tr>
            </AlternatingItemTemplate>

            <ItemTemplate>
                <tr style="">
                  <td>
                    <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />
                  </td>
                  <td>
                    <asp:Label ID="DoctorNameLabel" runat="server" 
                          Text='<%# Eval("Doctor.Doctor_Name") %>' />
                  </td>
                  <td>
                     <asp:Label ID="dateAptLabel" runat="server" 
                          Text='<%# Eval("dateApt", "{0:dd/MM/yyyy}") %>' />
                  </td>
                  <td>
                    <asp:Label ID="hourAptLabel" runat="server" 
                        Text='<%# Eval("hourApt", @"{0:hh\:mm}") %>' />
                  </td>

                  <td>
                    <asp:CheckBox id="MyCheckBox" runat="server"
                         value='<%# Eval("aptId") %>'
                         AutoPostBack="true"
                         OnCheckedChanged="Check_Clicked" />
                 </td>
                </tr>
            </ItemTemplatee>

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

除了doctorID之外，所有字段都具有正确的值

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

这是我的任命

 public partial class Doctor : INotifyPropertyChanging, INotifyPropertyChanged
 {

private static PropertyChangingEventArgs emptyChangingEventArgs = new 
        PropertyChangingEventArgs(String.Empty);

private int _Id;

private string _Doctor_name;

private EntitySet<Appointement> _Appointement;



 public partial class Appointement : INotifyPropertyChanging, INotifyPropertyChanged
 {

private static PropertyChangingEventArgs emptyChangingEventArgs = new 
             PropertyChangingEventArgs(String.Empty);

private int _aptId;

private System.Nullable<int> _clientId;

private int _doctorId;

private System.DateTime _dateApt;

private System.TimeSpan _hourApt;

private System.Nullable<bool> _IsAvailable;

private EntityRef<Doctor> _Doctor;

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

公共部分类医生：INotifyPropertyChanged，INotifyPropertyChanged
{
私有静态属性ChangingEventArgs emptyChangingEventArgs=new
PropertyChangingEventArgs（String.Empty）；
私人内部Id；
私有字符串\u医生\u姓名；
私人实体集（U）任命；
公共部分类任命：INotifyPropertyChanged，INotifyPropertyChanged
{
私有静态属性ChangingEventArgs emptyChangingEventArgs=new
PropertyChangingEventArgs（String.Empty）；
私人互联网；
private System.Nullable_clientId；
私人国际博士学位；
private System.DateTime\u dateApt；
private System.TimeSpan\u hourApt；
私有系统。可为空—可用；
私人实体主任医生；

医生的名字出来了，所以它以某种方式连接正确。我不明白为什么doctorId或doctor.Id没有显示在列表视图上

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

下面是如何定义appointment.dbml的： 任命表（aptId、clientId、doctorId、dateApt、hourApt、IsAvailable） 医生表（Id、医生姓名）

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

我注意到在appoiment.aspx的设计模式中，我的DoctorId列没有显示在DataBound中。你知道如何使用DataBound吗

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

---

谢谢

不知为什么我删除了表定义

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

我在定义的末尾移动了它们，它起作用了

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />

如果它能在未来帮助任何人

     <asp:Label ID="lblDoctorId" runat="server" Value='<%# Eval("doctorId") %>' />