从 WCF 调用 StreamWriter

Question

我有一个在我的控制台应用程序中运行良好的功能。但当我将它移至我的 WCF 时，它每次都会崩溃。无法弄清楚我做错了什么。

这是操作合同：

<OperationContract()> _
Function SendLetterToBatch(ByVal FinishedLetter As Letter) As Boolean
'Sends a completed letter to the batch for XStream, returns true/false.

这是 svc：

Imports System.Collections 进口系统 导入系统数据 导入 System.Data.SqlClient 导入 System.IO

Public Function SendLetterToBatch(ByVal FinishedLetter As Letter) As Boolean Implements ILetterWriter.SendLetterToBatch
    Dim CurDateTime As DateTime = DateTime.Now
    Dim Format As String = "yyyyMMdd HHmmss"
    Dim FileName As String


    'Create the text file name. Date / Time (yyyyMMdd HHmmss) to precede claim / policy number
    FileName = CurDateTime.ToString(Format) & FinishedLetter.ClaimOrPolicyNo.ToString


    'Remove Me -- temporary text file location
    FileName = "D:\" & FileName.ToString & ".txt"


    'Write the letter to the text file
    Using writer As StreamWriter = New StreamWriter(FileName)
        writer.Write("01")
        writer.Write("02" & FinishedLetter.Body.ToString)
        writer.Write("03")
    End Using


    'Function completed fine, return true
    SendLetterToBatch = True

End Function

最后，调用 WCF 的控制台应用程序：

    Dim objLetter As New Letter

    objLetter._ClaimOrPolicyNo = 99999
    objLetter._CompID = 23
    objLetter._StateID = 12
    objLetter._Body = "Dear Sir, you have not had much luck winning the lottery. We hope we can help. Next time, please choose 6/7/8/9/1 BONUS 2 on your ticket. Thank you, Us."

    Console.Write(client.SendLetterToBatch(objLetter))

我不明白。有人有什么想法吗？ WCF不支持streamwriter吗？任何想法将不胜感激！

谢谢， 贾森

Answer 1

如果代码在从控制台运行时有效，我猜想它与作为 svc 执行时的上下文有关。您是否通过 IIS 运行 svc？哪个帐户？该帐户是否对您尝试创建文件的路径具有写访问权限？