/// <summary>
/// 根据OpenID列表群发【订阅号不可用，服务号认证后可用】
/// </summary>
/// <param name="access_token"></param>
/// <param name="content">图文消息,语音,图片,视频:media_id; 文本:文本消息</param>
/// <param name="type"></param>
/// <param name="touser"></param>
/// <returns>success:{"errcode":0,"errmsg":"send job submission success","msg_id":34182}</returns>
public static dynamic ReplayOpenids(string access_token, string content, WeixinArtcleType type, IEnumerable <string> touser, string videoTitle, string videoDesc)
{
var url = string.Format("https://api.weixin.qq.com/cgi-bin/message/mass/send?access_token={0}", access_token);
var client = new HttpClient();
var builder = new StringBuilder();
builder.Append("{")
.Append('"' + "touser" + '"' + ":")
.Append("[");
foreach (var t in touser)
{
builder.Append('"' + t + '"').Append(",");
}
builder.Append("],");
switch (type)
{
case WeixinArtcleType.News:
builder.Append('"' + "mpnews" + '"' + ":")
.Append("{")
.Append('"' + "media_id" + '"' + ":").Append(content)
.Append("},")
.Append('"' + "msgtype" + '"' + ":").Append("mpnews");
break;
case WeixinArtcleType.Text:
builder.Append('"' + "text" + '"' + ":")
.Append("{")
.Append('"' + "content" + '"' + ":").Append(content)
.Append("},")
.Append('"' + "msgtype" + '"' + ":").Append("text");
break;
case WeixinArtcleType.Voice:
builder.Append('"' + "voice" + '"' + ":")
.Append("{")
.Append('"' + "media_id" + '"' + ":").Append(content)
.Append("},")
.Append('"' + "msgtype" + '"' + ":").Append("voice");
break;
case WeixinArtcleType.Image:
builder.Append('"' + "image" + '"' + ":")
.Append("{")
.Append('"' + "media_id" + '"' + ":").Append(content)
.Append("},")
.Append('"' + "msgtype" + '"' + ":").Append("image");
break;
case WeixinArtcleType.Video:
builder.Append('"' + "video" + '"' + ":")
.Append("{")
.Append('"' + "media_id" + '"' + ":").Append(content).Append(",")
.Append('"' + "title" + '"' + ":").Append(videoTitle).Append(",")
.Append('"' + "description" + '"' + ":").Append(videoDesc)
.Append("},")
.Append('"' + "msgtype" + '"' + ":").Append("video");
break;
}
builder.Append("}");
var result = client.PostAsync(url, new StringContent(builder.ToString())).Result;
return(DynamicJson.Parse(result.Content.ReadAsStringAsync().Result));
}