Question

获取错误：尝试调用我的Web服务时，用户代码未处理InvalidOperationException。我正在尝试序列化通过Web服务获取的类对象，并将其作为XML String返回，但遇到错误。我已经将对象的字段从私有更改为公共，但这似乎不是问题。这是引发的错误，但是当我结束会话时，我也会收到错误消息：远程服务器返回了一个错误：500个内部服务器错误并突出显示：

 Dim respond As HttpWebResponse = CType(request.GetResponse, HttpWebResponse)

不知道为什么在我查找时会发生这种情况。有建议吗？

我的网络服务

 <Route("Contents/{ordNbr}")>
 <HttpGet>
 Public Function GetOrderContents(ByVal ordNbr As String) As String

    Dim retValue As ReturnVal
    retValue = GetOrderInformation(ordNbr)
    Dim sp = New Sharepoint()
    Dim t = sp.GetOrderContent(retValue.Year, retValue.SONumber)
    Dim contentFolder = New SPFolderOver()
    contentFolder = SPFolderOver.LoadFolder(t)
    contentFolder.FolderName = t.FullPath

    Dim result = String.Empty
    Dim serializer As XmlSerializer = New XmlSerializer(contentFolder.[GetType]())
    Using writer As StringWriter = New StringWriter()
        serializer.Serialize(writer, contentFolder)
        Return result = writer.ToString()
    End Using
End Function

我对服务的表单调用

Public Sub SubmitOrder_Click(sender As Object, e As EventArgs) Handles SubmitOrder.Click

    Dim orderString As String = orderNumber.Text
    If orderString = "" Then
        MsgBox("Please Enter in Order Number")
        Exit Sub
    End If

    Dim apiUrl = "http://localhost:54754/orders/Contents/" + orderString

    Dim request As HttpWebRequest
    request = CType(WebRequest.Create(apiUrl), HttpWebRequest)
    request.Method = "GET"
    request.ContentType = "text/xml"

    Dim respond As HttpWebResponse = CType(request.GetResponse, HttpWebResponse)
    Dim myResponse = String.Empty
    Using sr As StreamReader = New StreamReader(respond.GetResponseStream())
        myResponse = sr.ReadToEnd()
    End Using

    Response.Write(myResponse)

End Sub

错误：将类对象序列化为XML字符串时，用户代码未处理InvalidOperationException

0 个答案: