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我在服务器端和客户端有一个 WCF 单通道实现。我在服务器端有一个自定义类，我试图传递给客户端。我正在尝试将自定义类的数组（集合）传递给客户端。

以下是我拥有的代码实现示例。

服务器端类结构：

'Module name ServerModule.dll

Public Class ServerChildClass
    Public m_Integer As Integer

    Public Property mInteger As Integer
        Get
            Return m_Integer
        End Get
        Set(value As Integer)
            m_Integer = value
        End Set
    End Property
End Class

Public Class ServerChildClass2
    Public m_Integer As Integer

    Public Property mInteger As Integer
        Get
            Return m_Integer
        End Get
        Set(value As Integer)
            m_Integer = value
        End Set
    End Property
End Class

Public Class ServerChildClass3
    Public m_Integer As Integer

    Public Property mInteger As Integer
        Get
            Return m_Integer
        End Get
        Set(value As Integer)
            m_Integer = value
        End Set
    End Property
End Class

WCF 数据合同：

Imports System.ServiceModel
Imports System.Runtime.Serialization
Imports ServerModule

<DataContract(Name:="Transaction")> <Serializable()>
<KnownType(GetType(List(Of Object)))>
<KnownType(GetType(Integer))>
<KnownType(GetType(ServerChildClass))>
<KnownType(GetType(ServerChildClass2))>
<KnownType(GetType(ServerChildClass3))>
Public Class Transaction
    Implements ICloneable
    Implements IExtensibleDataObject

    Public Sub New()
    End Sub

    'Add <DataMember()> here
    Public Function Clone() As Object Implements System.ICloneable.Clone 'client uses this to define query
        Dim newObject As New IHermesEngineServiceDataContract
        Return newObject
    End Function

    Public Property ExtensionData As ExtensionDataObject Implements IExtensibleDataObject.ExtensionData

    <DataMember()>
    Public Property Command As Integer

    <DataMember()>
    Public Property Client As Integer

'A list of Integer, or a list of  ServerChildClass or ServerChildClass2 or ServerChildClass3. Basically a list of objects
    <DataMember()>
    Public Property Parameters As System.Object()
End Class

WCF 契约和类定义：

    'Service contract
<ServiceContract()> _
Public Interface IControlContract
    <OperationContract()>
    Function GetUpdates(ByVal RequestType As Integer, ByRef Info As Transaction()) As Boolean
End Interface

'Service contract class implementation
Public Class ControlClass
    Implements IControlContract
    Function GetUpdates(ByVal RequestType As Integer, ByRef Info As Transaction()) As Boolean Implements IControlContract.GetUpdates
        Return MyBase.Channel.GetUpdates(RequestType, Info)
    End Function
End Class

WCF 服务器端实现：

Imports ServerModule
Public Class WCFClass
    Implements IControlContract
    Public Function GetUpdates(ByVal RequestType As Integer, ByRef Info As Transaction()) As Boolean Implements IControlContract.GetUpdates
        ReDim Info(2)
        'Array of ServerChildClass of length x
        Dim ClassArray As ArrayList
        'Array of ServerChildClass2 of length x
        Dim Class2Array As ArrayList

        If (RequestType = 1) Then

            Info(0) = New Transaction
            Info(0).Command = RequestType
            Info(0).Client = RequestType
            Info(0).Parameters = ClassArray.ToArray()

            Info(1) = New Transaction
            Info(1).Command = RequestType
            Info(1).Client = RequestType
            Info(1).Parameters = Class2Array.ToArray()

            Info(2) = New Transaction
            Info(2).Command = RequestType
            Info(2).Client = RequestType
            Info(2).Parameters = "Test String"
            End
            Return True
    End Function
End Class

当我将以下结构从服务器端发送到客户端时，我收到以下错误。“接收对http://localhost/xyz的 HTTP 响应时发生错误。这可能是由于服务端点绑定未使用 HTTP 协议。这也可能是由于服务器中止了 HTTP 请求上下文（可能由于服务关闭）。有关更多详细信息，请参阅服务器日志。”

请让我知道问题发生在哪里。我如何成功地将一组类引用作为参数发送到客户端？任何帮助，将不胜感激。

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1 回答 1

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在 Visual Studio 中，在您的客户端项目 Connected Services 上，右键单击您的 WCF 名称，选择“配置引用服务”，在“集合类型”上选择“System.Collections.Generic.List”，单击“确定”。再次测试。

于 2019-03-07T19:39:42.093 回答