**主企业号主动发送消息，也就是企业号主动推送的消息，适合于企业的通知，通告等。因此如果公司有通知，要求通知到所有员工，就应该使用主动发送消息。**
格式是json格式，而且微信很灵活，当touser，toparty，totag的json值是null时，微信服务器主动忽略了。原来还担心，如果是null，在生成json格式时如何忽略掉是null的字段。
核心基本类：
~~~
public class MsgBase
{
public MsgBase()
{
this.safe = "0"; //表示是否是保密消息，0表示否，1表示是，默认0
}
/// <summary>
/// UserID列表（消息接收者，多个接收者用‘|’分隔）。特殊情况：指定为@all，则向关注该企业应用的全部成员发送
/// </summary>
public string touser { get; set; }
/// <summary>
/// PartyID列表，多个接受者用‘|’分隔。当touser为@all时忽略本参数
/// </summary>
public string toparty { get; set; }
/// <summary>
/// TagID列表，多个接受者用‘|’分隔。当touser为@all时忽略本参数
/// </summary>
public string totag { get; set; }
/// <summary>
/// 消息类型
/// </summary>
public string msgtype { get; set; }
/// <summary>
/// 企业应用的id，整型。可在应用的设置页面查看
/// </summary>
public int agentid { get; set; }
/// <summary>
/// 表示是否是保密消息，0表示否，1表示是，默认0
/// </summary>
public string safe { get; set; }
}
~~~
~~~
public static class MsgType
{
public enum MsgBaseEnum
{
Text = 1,
image = 2,
voice = 3,
video = 4,
file = 5,
news = 6,
mpnews =7
};
public static string GetMsgTypeText(MsgBaseEnum type)
{
string text = "";
switch(type)
{
case MsgBaseEnum.Text:
text = "text";
break;
case MsgBaseEnum.image:
text = "image";
break;
case MsgBaseEnum.voice:
text = "voice";
break;
case MsgBaseEnum.video:
text = "video";
break;
case MsgBaseEnum.file:
text = "file";
break;
case MsgBaseEnum.news:
text = "news";
break;
case MsgBaseEnum.mpnews:
text = "mpnews";
break;
default:
throw new Exception("type=" + type + "，此类型的消息没有实现");
}
return text;
}
}
~~~
文字类型的消息
~~~
public class TextMsg : MsgBase
{
public TextMsg(string content)
{
this.text = new TextMsgContent(content);
this.msgtype = MsgType.GetMsgTypeText(MsgType.MsgBaseEnum.Text);
}
public TextMsgContent text { get; set; }
}
public class TextMsgContent
{
public TextMsgContent(string content)
{
this.content = content;
}
public string content { get; set; }
}
~~~
发送消息
~~~
public static class BLLMsg
{
public static bool SendMessage(MsgBase data)
{
string urlFormat = "https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token={0}";
string accessToken = BLLAccessToken.GetAccessToken();
var url = string.Format(urlFormat, accessToken);
WebUtils ut = new WebUtils();
var postData = Tools.ToJsonString<MsgBase>(data);
//数据不用加密发送
LogInfo.Info("发送消息: " + postData);
string sendResult = ut.DoPost(url, postData);
SendMsgResult tempAccessTokenjson = Tools.JsonStringToObj<SendMsgResult>(sendResult);
if (tempAccessTokenjson.HasError())
{
LogInfo.Error("发送消息错误: " + Tools.ToJsonString<SendMsgResult>(tempAccessTokenjson));
return false;
}
return true;
}
}
~~~
测试代码：
~~~
private void button9_Click(object sender, EventArgs e)
{
TextMsg data = new TextMsg("测试发送文字消息给整个企业" + DateTime.Now);
data.agentid = 7;
data.safe = "0";
data.toparty = "1";
BLLMsg.SendMessage(data);
}
private void button11_Click(object sender, EventArgs e)
{
TextMsg data = new TextMsg("测试发送文字消息给医疗部" + DateTime.Now);
data.agentid = 7;
data.safe = "0";
data.toparty = "2";
BLLMsg.SendMessage(data);
}
private void button10_Click(object sender, EventArgs e)
{
TextMsg data = new TextMsg("测试发送文字消息给所有用户" + DateTime.Now);
data.agentid = 7;
data.safe = "0";
data.touser = "@all";
BLLMsg.SendMessage(data);
}
private void button1_Click(object sender, EventArgs e)
{
TextMsg data = new TextMsg("单用户文字消息" + DateTime.Now);
data.agentid = 7;
data.safe = "0";
data.touser = "iaodong";
BLLMsg.SendMessage(data);
}
~~~
[主动发送消息官方文档](http://qydev.weixin.qq.com/wiki/index.php?title=%E5%8F%91%E9%80%81%E6%8E%A5%E5%8F%A3%E8%AF%B4%E6%98%8E)
