Question

我不知道为什么我在代码中收到TimeOutException：

    Dim Uri2 As New Uri("http://localhost:8733/Design_Time_Addresses/ssWcfService/Service1/")
    Dim binding2 As New WSDualHttpBinding()

    Dim callback = New MyCallBackClient()

    Dim Client = New MyContractClient(callback, binding2, New EndpointAddress(Uri2))

    'Dim Proxy = Client.ChannelFactory.CreateChannel()
    Dim ProxyNotFaulty = Client.ChannelFactory.CreateChannel()

    Try
        Dim dataList As New List(Of DataClass)
        Dim datas As New DataClass

        RichTextBox.Text = "Connecting to WCF Service..."
        RichTextBox.Text += Environment.NewLine + "Please Wait..."

        RichTextBox.Text += Environment.NewLine + "Please Wait..."
        RichTextBox.Text += Environment.NewLine + "The Operation is now Invoking..."

        ProxyNotFaulty.DoSomething()

        For Each Clientdata As DataClass In dataList
            RichTextBox.Text += "The CallBack Status" + Clientdata.callbackMessage
            RichTextBox.Text += Environment.NewLine
            RichTextBox.Text += "After CallBack Status" + Clientdata.OnCallBackMessage
        Next Clientdata
        Client.Close()
    Catch ex As Exception
        MessageBox.Show("An Exception Happened:" + Environment.NewLine + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
        Client.Abort()
    Finally
    End Try

Sub DoSomething() Implements IService1.DoSomething
    data.callbackMessage = "Call Back is Made SuccessFully From Client To Service"
    data.OnCallBackMessage = "Null"
    dataList.Add(data)
    Dim callBack = OperationContext.Current.GetCallbackChannel(Of IIIService1)()
    callBack.OnCallBack()
End Sub

Public Interface IService1

    <OperationContract()>
    Sub DoSomething()

    <OperationContract()>
    Sub DoSomethingTwo()

    <OperationContract()>
    Function GetStatus() As List(Of DataClass)


    '<OperationContract()>
    'Function GetData(ByVal value As Integer) As String

    '<OperationContract()>
    'Function GetDataUsingDataContract(ByVal composite As CompositeType) As CompositeType

    ' TODO: Add your service operations here

End Interface

Public Interface IIIService1

    <OperationContract(IsOneWay:=True)>
    Sub OnCallBack()

    <OperationContract(IsOneWay:=True)>
    Sub OnCallBackFromService()


End Interface

Answer 1

它是否可以满足您的服务需求？您是否使用过Fiddler来了解通信情况？使用visual studio附加到您的服务（自托管）或附加到IIS（在IIS下托管）并在入口点设置断点并查看其中发生的情况。

有可能

无法使用您的服务
您的服务耗时太长而且超时

WCF回调中的超时异常

1 个答案: