/// <summary>
/// 根据OpenId列表群发消息
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="tousers">OpenId列表</param>
/// <param name="messageType">群发消息类型</param>
/// <param name="mediaIdOrContent">多媒体id或者文本内容</param>
/// <param name="errorMessage">返回发送是否成功</param>
/// <returns>如果发送成功，返回消息ID；否则，返回-1。</returns>
public static long Send(string userName, IEnumerable <string> tousers, MassMessageTypeEnum messageType, string mediaIdOrContent, out ErrorMessage errorMessage)
{
long messageId = -1;
if (tousers == null)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, string.Format("接收者不正确，数目必须大于0，小于等于{0}。", maxUserCount));
return(messageId);
}
List <string> touserList = new List <string>(tousers);
if (touserList.Count == 0 || touserList.Count > maxUserCount)
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, string.Format("接收者不正确，数目必须大于0，小于等于{0}。", maxUserCount));
return(messageId);
}
if (string.IsNullOrWhiteSpace(mediaIdOrContent))
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode,
string.Format("缺少{0}。", messageType == MassMessageTypeEnum.text ? "文本内容" : "媒体ID"));
return(messageId);
}
string json = GetMassMessageJsonString(touserList.ToArray(), messageType, mediaIdOrContent);
return(Send(userName, urlForSending, json, out errorMessage));
}
/// <summary>
/// 预览群发消息
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="touser">OpenId</param>
/// <param name="messageType">群发消息类型</param>
/// <param name="mediaIdOrContent">多媒体id或者文本内容</param>
/// <param name="errorMessage">返回发送是否成功</param>
/// <returns>如果发送成功，返回消息ID；否则，返回-1。</returns>
public static long Preview(string userName, string touser, MassMessageTypeEnum messageType, string mediaIdOrContent, out ErrorMessage errorMessage)
{
long messageId = -1;
if (string.IsNullOrWhiteSpace(mediaIdOrContent))
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode,
string.Format("缺少{0}。", messageType == MassMessageTypeEnum.text ? "文本内容" : "媒体ID"));
return(messageId);
}
string json = GetMassMessageJsonString(touser, messageType, mediaIdOrContent);
return(Send(userName, urlForPreviewing, json, out errorMessage));
}
/// <summary>
/// 获取群发消息的json字符串。
/// </summary>
/// <param name="touser">OpenId</param>
/// <param name="messageType">群发消息类型</param>
/// <param name="mediaIdOrContent">多媒体id或者文本内容</param>
/// <returns>返回群发消息的json字符串。</returns>
private static string GetMassMessageJsonString(string touser, MassMessageTypeEnum messageType, string mediaIdOrContent)
{
dynamic msg = new ExpandoObject();
msg.touser = touser;
if (messageType == MassMessageTypeEnum.text)
{
((IDictionary <string, object>)msg).Add(messageType.ToString(), new { content = mediaIdOrContent });
}
else
{
((IDictionary <string, object>)msg).Add(messageType.ToString(), new { media_id = mediaIdOrContent });
}
msg.msgtype = messageType.ToString();
return(JsonConvert.SerializeObject(msg));
}
/// <summary>
/// 根据分组群发消息
/// </summary>
/// <param name="userName">公众号</param>
/// <param name="isToAll">是否群发给所有用户</param>
/// <param name="groupId">如果群发给所有用户，忽略该参数；否则群发给该组中的用户</param>
/// <param name="messageType">群发消息类型</param>
/// <param name="mediaIdOrContent">多媒体id或者文本内容</param>
/// <param name="errorMessage">返回发送是否成功</param>
/// <returns>如果发送成功，返回消息ID；否则，返回-1。</returns>
public static long Send(string userName, bool isToAll, string groupId, MassMessageTypeEnum messageType, string mediaIdOrContent, out ErrorMessage errorMessage)
{
long messageId = -1;
if (!isToAll && string.IsNullOrWhiteSpace(groupId))
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode, "缺少分组ID。");
return(messageId);
}
if (string.IsNullOrWhiteSpace(mediaIdOrContent))
{
errorMessage = new ErrorMessage(ErrorMessage.ExceptionCode,
string.Format("缺少{0}。", messageType == MassMessageTypeEnum.text ? "文本内容" : "媒体ID"));
return(messageId);
}
string json = GetMassMessageJsonString(isToAll, groupId, messageType, mediaIdOrContent);
return(Send(userName, urlForSendingAll, json, out errorMessage));
}
/// <summary>
/// 获取群发消息的json字符串。
/// </summary>
/// <param name="isToAll">是否群发给所有用户</param>
/// <param name="groupId">如果群发给所有用户，忽略该参数；否则群发给该组中的用户</param>
/// <param name="messageType">群发消息类型</param>
/// <param name="mediaIdOrContent">多媒体id或者文本内容</param>
/// <returns>返回群发消息的json字符串。</returns>
private static string GetMassMessageJsonString(bool isToAll, string groupId, MassMessageTypeEnum messageType, string mediaIdOrContent)
{
dynamic msg = new ExpandoObject();
msg.filter = new
{
is_to_all = isToAll,
group_id = isToAll ? string.Empty : groupId
};
if (messageType == MassMessageTypeEnum.text)
{
((IDictionary <string, object>)msg).Add(messageType.ToString(), new { content = mediaIdOrContent });
}
else
{
((IDictionary <string, object>)msg).Add(messageType.ToString(), new { media_id = mediaIdOrContent });
}
msg.msgtype = messageType.ToString();
return(JsonConvert.SerializeObject(msg));
}