/// <summary>
/// 获取视频
/// </summary>
/// <param name="MsgID"></param>
/// <returns></returns>
public string Getvideo(string MsgID)
{
uri = domain + "/cgi-bin/mmwebwx-bin/webwxgetvideo?msgid=" + MsgID + "&skey=" + skey;
byte[] bs64 = HttpHelps.HttpDownloadFile(uri, cookie);
//File.WriteAllBytes();
return(Convert.ToBase64String(bs64));
}