Question

我一直在尝试在我的localhost和调试中使用web服务，但它给了我这个错误：

System.InvalidOperationException：类型'ParticipantDataService.Participant + OutsideAccountDetails + FundCollection'的DataContract无法添加到DataContractSet，因为类型'ParticipantDataService.Participant + FundCollection'在命名空间'http：// schemas中具有相同的数据协定名称'ArrayOfFundDetails' .datacontract.org / 2004/07 / ParticipantDataService'已经存在且合同不相等。

之前有没有人有这个错误？

感谢。

下面的简化代码（注意：不是我的代码。我正在修改以前开发人员的代码，不再在这里了。也是一个noobie w / web services。在下面这个代码块中，因为这个问题似乎与资金有关现在，我已经使所有'基金'参考文献比其他参考文献更明显了。谢谢。）

Namespace COMParticipantNameSpace
<DataContract(Namespace:="XYZ", Name:="COMParticipant"),                          
KnownType(GetType(COMParticipant))> _
Public Class COMParticipant
    Inherits COMResponse

    Private _FullName As FullName
    (Other initialized variables...)

    Protected Friend Sub New...

    #Region "Properties"
    <DataMember(Name:="Name", Order:=0)>...
    <Other DataMembers...>
    #End Region

    #Region "Structures"
    Public Structure FullName...
            (Other Public Structures)
    #End Region
    #Region "Classes"
    <DataContract(Name:="ParticipantPortfolio")>....

    Public Class GroupCollection...
    End Class

    <DataContract(Name:="Group")>...
            <DataMember(Name:="Funds", Order:=6)> _
            Public Property Funds() As COMFundCollection
                Get
                    Return _Funds
                End Get
                Set(ByVal value As COMFundCollection)
                    _Funds = value
                End Set
            End Property
    End Class

    Public Class COMAccountCollection
        Inherits System.Collections.ObjectModel.Collection(Of COMAccountDetails)
    End Class

    <DataContract(Name:="COMAccountDetails")> _
    Public Class COMAccountDetails

        (Other initialized variables...)
        Private _Funds As COMFundCollection

        <DataMember Order 0,1,2,3,etc...)>...

        <DataMember(Name:="Funds", Order:=7)> _
        Public Property Funds() As COMFundCollection
            Get
                Return _Funds
            End Get
            Set(ByVal value As COMFundCollection)
                _Funds = value
            End Set
        End Property

    End Class

    Public Class COMFundCollection
        Inherits System.Collections.ObjectModel.Collection(Of COMFundDetails)
    End Class

    Public Class OutsideAccountCollection
    End Class

    <DataContract(Name:="OutsideAccountDetails")> _
        Public Class OutsideAccountDetails

        (Other initialized variables...)
        Private _Funds As FundCollection

        <Order 1, 2, 3, etc...>

        <DataMember(Name:="Funds", Order:=15)> _
        Public Property Funds() As FundCollection
            Get
                Return _Funds
            End Get
            Set(ByVal value As FundCollection)
                _Funds = value
            End Set
        End Property

        Public Class FundCollection
            Inherits System.Collections.ObjectModel.Collection(Of FundDetails)
        End Class

        <DataContract(Name:="FundDetails")>...

    End Class

    Public Class TransactionTypeCollection
        Inherits System.Collections.ObjectModel.Collection(Of TransactionTypeDetail)
    End Class
    Public Class TransactionTypeDetail...
    Public Class TransactionCollection...

    <DataContract(Name:="Transaction")> _
    Public Class Transaction

        (Other initialized variables...)
        Private _Funds As TransactionFundCollection

        <DataMember Order 1,2,3,etc ...>

        <DataMember(Name:="Funds", Order:=7)> _
        Public Property Funds() As TransactionFundCollection
            Get
                Return _Funds
            End Get
            Set(ByVal value As TransactionFundCollection)
                _Funds = value
            End Set
        End Property

    End Class
    Public Class TransactionFundCollection
        Inherits System.Collections.ObjectModel.Collection(Of TransactionFundDetails)
    End Class

    #End Region
    End Class

    End Namespace}

Answer 1

虽然不是您问题的解决方案，但我收到了同样的错误消息。所以，我认为其他人在这里发布它是有用的。就我而言，它与链继承有关。

我在名为DerivedTypes的基类上有一个静态方法（很像这里描述的：Generally accepted way to avoid KnownType attribute for every derived class），它调用扩展方法来确定它的继承人。

如果你有A：B，B：C，那么C应该是这样的：

[DataContract]
[KnownType("DerivedTypes")]
public class C {
  internal static Type[] DerivedTypes() {
    typeof(C).GetDerivedTypes();
  }
}

调用B.DerivedTypes（）会（错误地）获得太多类型，因为它会调用typeof(C).GetDerivedTypes()。这在我的情况下触发了相同的错误。

除非B是：

[DataContract]
[KnownType("DerivedTypes")]
public class B : C {
  internal **new** static Type[] DerivedTypes() {
    typeof(B).GetDerivedTypes();
  }
}

自然没有'**'。现在，如果遇到类型B，B.DerivedTypes（）将不会调用其父类。由于A没有子类，因此不需要KnownType属性。

顺便说一句，我对扩展方法所做的修改是扩展方法使用类型中的程序集（所以Assembly.GetAssembly(baseType)），我将静态方法内部用于测试目的。私人也应该没事。

datacontracts不等同

1 个答案: