vb.net - 字符串中的反斜杠字符导致字符串在 WCF 中计算为 "nothing"

Question

我有一个用 VB.NET 编写的 WCF 应用程序，它采用通用 Dictionary(Of String, String) 作为参数之一。当我传入一个以反斜杠 \ 作为值中的字符之一的键/值对时，客户端会自动将整个值更改为 Nothing 或在 XML 中它显示了这个:

<Value i:nil="true />

将字符串中的反斜杠传递给 WCF 服务时，是否有一些特殊的方法可以转义反斜杠？据我所知，反斜杠不是 XML 中的保留字符。

Answer 1

您如何调用您的服务？我刚刚尝试过这种情况(请参阅下面的代码)，并且服务器正确打印了值。

Public Class StackOverflow_6116861_751090
    <ServiceContract()> _
    Public Interface ITest
        <OperationContract()> Sub Process(ByVal dict As Dictionary(Of String, String))
    End Interface

    Public Class Service
        Implements ITest

        Public Sub Process(ByVal dict As System.Collections.Generic.Dictionary(Of String, String)) Implements ITest.Process
            For Each key In dict.Keys
                Console.WriteLine("{0}: {1}", key, dict(key))
            Next
        End Sub
    End Class

    Public Shared Sub Test()
        Dim baseAddress As String = "http://" + Environment.MachineName + ":8000/Service"
        Dim host As ServiceHost = New ServiceHost(GetType(Service), New Uri(baseAddress))
        host.AddServiceEndpoint(GetType(ITest), New BasicHttpBinding(), "")
        host.Open()
        Console.WriteLine("Host opened")

        Dim factory As ChannelFactory(Of ITest) = New ChannelFactory(Of ITest)(New BasicHttpBinding(), New EndpointAddress(baseAddress))
        Dim proxy As ITest = factory.CreateChannel()

        Dim dict As Dictionary(Of String, String) = New Dictionary(Of String, String)
        dict.Add("o\ne", "uno")
        dict.Add("two", "do\s")
        dict.Add("th\ree", "tr\es")
        proxy.Process(dict)
    End Sub
End Class