/// <summary>
/// 获取XDocument转换后的IResponseMessageBase实例（通常在反向读取日志的时候用到）。
/// 如果MsgType不存在，抛出UnknownRequestMsgTypeException异常
/// </summary>
/// <returns></returns>
public static IResponseMessageBase GetResponseEntity(XDocument doc)
{
ResponseMessageBase responseMessage = null;
ResponseMsgType msgType;
try
{
msgType = MsgTypeHelper.GetResponseMsgType(doc);
switch (msgType)
{
case ResponseMsgType.Text:
responseMessage = new ResponseMessageText();
break;
case ResponseMsgType.Image:
responseMessage = new ResponseMessageImage();
break;
case ResponseMsgType.Voice:
responseMessage = new ResponseMessageVoice();
break;
case ResponseMsgType.Video:
responseMessage = new ResponseMessageVideo();
break;
case ResponseMsgType.News:
responseMessage = new ResponseMessageNews();
break;
default:
throw new UnknownRequestMsgTypeException(string.Format("MsgType：{0} 在ResponseMessageFactory中没有对应的处理程序！", msgType), new ArgumentOutOfRangeException());
}
EntityHelper.FillEntityWithXml(responseMessage, doc);
}
catch (ArgumentException ex)
{
throw new WeixinException(string.Format("ResponseMessage转换出错！可能是MsgType不存在！，XML：{0}", doc.ToString()), ex);
}
return responseMessage;
}