/// <summary>
/// 获取XDocument转换后的IRequestMessageBase实例。
/// 如果MsgType不存在，抛出UnknownRequestMsgTypeException异常
/// </summary>
/// <returns></returns>
public static IRequestMessageBase GetRequestEntity(XDocument doc)
{
RequestMessageBase requestMessage = null;
RequestMsgType msgType;
ThirdPartyInfo infoType;
//区分普通消息与第三方应用授权推送消息，MsgType有值说明是普通消息，反之则是第三方应用授权推送消息
if (doc.Root.Element("MsgType") != null)
{
//常规推送信息
try
{
msgType = MsgTypeHelper.GetRequestMsgType(doc);
switch (msgType)
{
case RequestMsgType.Text:
requestMessage = new RequestMessageText();
break;
case RequestMsgType.Location:
requestMessage = new RequestMessageLocation();
break;
case RequestMsgType.Image:
requestMessage = new RequestMessageImage();
break;
case RequestMsgType.Voice:
requestMessage = new RequestMessageVoice();
break;
case RequestMsgType.Video:
requestMessage = new RequestMessageVideo();
break;
case RequestMsgType.Event:
//判断Event类型
switch (doc.Root.Element("Event").Value.ToUpper())
{
case "CLICK"://菜单点击
requestMessage = new RequestMessageEvent_Click();
break;
case "VIEW"://URL跳转
requestMessage = new RequestMessageEvent_View();
break;
case "SUBSCRIBE"://订阅（关注）
requestMessage = new RequestMessageEvent_Subscribe();
break;
case "UNSUBSCRIBE"://取消订阅（关注）
requestMessage = new RequestMessageEvent_UnSubscribe();
break;
case "SCANCODE_PUSH"://扫码推事件(scancode_push)
requestMessage = new RequestMessageEvent_Scancode_Push();
break;
case "SCANCODE_WAITMSG"://扫码推事件且弹出“消息接收中”提示框(scancode_waitmsg)
requestMessage = new RequestMessageEvent_Scancode_Waitmsg();
break;
case "PIC_SYSPHOTO"://弹出系统拍照发图(pic_sysphoto)
requestMessage = new RequestMessageEvent_Pic_Sysphoto();
break;
case "PIC_PHOTO_OR_ALBUM"://弹出拍照或者相册发图（pic_photo_or_album）
requestMessage = new RequestMessageEvent_Pic_Photo_Or_Album();
break;
case "PIC_WEIXIN"://弹出微信相册发图器(pic_weixin)
requestMessage = new RequestMessageEvent_Pic_Weixin();
break;
case "LOCATION_SELECT"://弹出地理位置选择器（location_select）
requestMessage = new RequestMessageEvent_Location_Select();
break;
case "LOCATION"://上报地理位置事件（location）
requestMessage = new RequestMessageEvent_Location();
break;
case "ENTER_AGENT"://用户进入应用的事件推送（enter_agent）
requestMessage = new RequestMessageEvent_Enter_Agent();
break;
case "BATCH_JOB_RESULT"://异步任务完成事件推送(batch_job_result)
requestMessage = new RequestMessageEvent_Batch_Job_Result();
break;
default://其他意外类型（也可以选择抛出异常）
requestMessage = new RequestMessageEventBase();
break;
}
break;
default:
throw new UnknownRequestMsgTypeException(string.Format("MsgType：{0} 在RequestMessageFactory中没有对应的处理程序！", msgType), new ArgumentOutOfRangeException());//为了能够对类型变动最大程度容错（如微信目前还可以对公众账号suscribe等未知类型，但API没有开放），建议在使用的时候catch这个异常
}
EntityHelper.FillEntityWithXml(requestMessage, doc);
}
catch (ArgumentException ex)
{
throw new WeixinException(string.Format("RequestMessage转换出错！可能是MsgType不存在！，XML：{0}", doc.ToString()), ex);
}
}
else if (doc.Root.Element("InfoType") != null)
{
//第三方回调
try
{
infoType = MsgTypeHelper.GetThirdPartyInfo(doc);
switch (infoType)
{
case ThirdPartyInfo.SUITE_TICKET://推送suite_ticket协议
requestMessage = new RequestMessageInfo_Suite_Ticket();
break;
case ThirdPartyInfo.CHANGE_AUTH://变更授权的通知
requestMessage = new RequestMessageInfo_Change_Auth();
break;
case ThirdPartyInfo.CANCEL_AUTH://取消授权的通知
requestMessage = new RequestMessageInfo_Cancel_Auth();
break;
default:
throw new UnknownRequestMsgTypeException(string.Format("InfoType：{0} 在RequestMessageFactory中没有对应的处理程序！", infoType), new ArgumentOutOfRangeException());//为了能够对类型变动最大程度容错（如微信目前还可以对公众账号suscribe等未知类型，但API没有开放），建议在使用的时候catch这个异常
}
EntityHelper.FillEntityWithXml(requestMessage, doc);
}
catch (ArgumentException ex)
{
throw new WeixinException(string.Format("RequestMessage转换出错！可能是MsgType和InfoType都不存在！，XML：{0}", doc.ToString()), ex);
}
}
else
{
throw new WeixinException(string.Format("RequestMessage转换出错！可能是MsgType和InfoType都不存在！，XML：{0}", doc.ToString()));
}
return requestMessage;
}
/// <summary>
/// 获取XDocument转换后的IRequestMessageBase实例。
/// 如果MsgType不存在，抛出UnknownRequestMsgTypeException异常
/// </summary>
/// <returns></returns>
public static IRequestMessageBase GetRequestEntity(XDocument doc)
{
RequestMessageBase requestMessage = null;
RequestMsgType msgType;
try
{
msgType = MsgTypeHelper.GetRequestMsgType(doc);
switch (msgType)
{
case RequestMsgType.Text:
requestMessage = new RequestMessageText();
break;
case RequestMsgType.Location:
requestMessage = new RequestMessageLocation();
break;
case RequestMsgType.Image:
requestMessage = new RequestMessageImage();
break;
case RequestMsgType.Voice:
requestMessage = new RequestMessageVoice();
break;
case RequestMsgType.Video:
requestMessage = new RequestMessageVideo();
break;
case RequestMsgType.Event:
//判断Event类型
switch (doc.Root.Element("Event").Value.ToUpper())
{
case "CLICK"://菜单点击
requestMessage = new RequestMessageEvent_Click();
break;
case "VIEW"://URL跳转
requestMessage = new RequestMessageEvent_View();
break;
case "SUBSCRIBE"://订阅（关注）
requestMessage = new RequestMessageEvent_Subscribe();
break;
case "UNSUBSCRIBE"://取消订阅（关注）
requestMessage = new RequestMessageEvent_UnSubscribe();
break;
case "SCANCODE_PUSH"://扫码推事件(scancode_push)
requestMessage = new RequestMessageEvent_ScancodePush();
break;
case "SCANCODE_WAITMSG"://扫码推事件且弹出“消息接收中”提示框(scancode_waitmsg)
requestMessage = new RequestMessageEvent_ScancodeWaitmsg();
break;
case "PICSYSPHOTO"://弹出系统拍照发图(pic_sysphoto)
requestMessage = new RequestMessageEvent_PicSysphoto();
break;
case "PICPHOTOORALBUM"://弹出拍照或者相册发图（pic_photo_or_album）
requestMessage = new RequestMessageEvent_PicPhotoOrAlbum();
break;
case "PICWEIXIN"://弹出微信相册发图器(pic_weixin)
requestMessage = new RequestMessageEvent_PicWeixin();
break;
case "LOCATIONSELECT"://弹出地理位置选择器（location_select）
requestMessage = new RequestMessageEvent_LocationSelect();
break;
default://其他意外类型（也可以选择抛出异常）
requestMessage = new RequestMessageEventBase();
break;
}
break;
default:
throw new UnknownRequestMsgTypeException(string.Format("MsgType：{0} 在RequestMessageFactory中没有对应的处理程序！", msgType), new ArgumentOutOfRangeException());//为了能够对类型变动最大程度容错（如微信目前还可以对公众账号suscribe等未知类型，但API没有开放），建议在使用的时候catch这个异常
}
EntityHelper.FillEntityWithXml(requestMessage, doc);
}
catch (ArgumentException ex)
{
throw new WeixinException(string.Format("RequestMessage转换出错！可能是MsgType不存在！，XML：{0}", doc.ToString()), ex);
}
return requestMessage;
}