C＃SAPI在Web服務

var speechEngine = new SpVoiceClass(); 
SetVoice(speechEngine, job.Voice); 

var fileMode = SpeechStreamFileMode.SSFMCreateForWrite; 
var fileStream = new SpFileStream(); 
try 
{ 
    fileStream.Open(filePath, fileMode, false); 
    speechEngine.AudioOutputStream = fileStream; 
    speechEngine.Speak(job.Script, SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak | SpeechVoiceSpeakFlags.SVSFDefault); //TODO: Change to XML 
    //Wait for 15 minutes only 
    speechEngine.WaitUntilDone((uint)new TimeSpan(0, 15, 0).TotalMilliseconds); 
} 
finally 
{ 
    fileStream.Close(); 
}

這個確切的代碼在一個WinForm的應用程序，但是當我運行一個Web服務中，我得到以下C＃SAPI在Web服務

System.Runtime.InteropServices.COMException was unhandled 
    Message="Exception from HRESULT: 0x80045003" 
    Source="Interop.SpeechLib" 
    ErrorCode=-2147201021

沒有人有任何想法可能是造成這個錯誤？該錯誤代碼的含義

SPERR_UNSUPPORTED_FORMAT

爲了完整這裏是SetVoice方法

void SetVoice(SpVoiceClass speechEngine, string voiceName) 
{ 
    var voices = speechEngine.GetVoices(null, null); 
    for (int index = 0; index < voices.Count; index++) 
    { 
     var currentToken = (SpObjectToken)voices.Item(index); 
     if (currentToken.GetDescription(0) == voiceName) 
     { 
      speechEngine.SetVoice((ISpObjectToken)currentToken); 
      return; 
     } 
    } 
    throw new Exception("Voice not found: " + voiceName); 
}

我已經給予了充分的用戶訪問該文件夾C：\ Temp其中的文件將被寫入。任何幫助，將不勝感激！

來源

2009-10-28 Peter Morris

哪一行產生錯誤？ – ChrisF 2009-10-28 20:51:18

SpeechEngine.Speak導致錯誤 – 2009-10-29 10:20:00