为什么能裂变推广是营销学和心理学的范畴了，这里举个简单的例子来介绍。公众号有足以吸引粉丝的地方，要么是知识、要么是优惠、要么是服务，反正不同于其他人，能够吸引人关注；有了这个前提，怎么让更多的人知道这个公众号，要有很多的推广人，俗称合伙人，合伙人每推广一个粉丝关注，都有回报，要么短期的一次性回报，要么长期的粉丝消费酬金回报。下面通过实例讲解：
一、演示应用过程
1、对公众号输入合伙人
2、获取合伙人自己定制的海报，内置公众号分配给的带参数二维码
3、推荐他人享受优惠，扫码关注
二、实现逻辑
1、注册合伙人，通过手机号验证是合伙人本人，从空闲的二维码清单中给其分配一个。上篇文章给出了这个二维码清单的数据表。
代码以后再讲。
2、再来看微信用户关注事件，有普通关注和扫描带参数二维码的关注，普通关注之前的文章讲过了，这里重点介绍微信用户扫描带参数二维码事件的处理。用户扫描带场景值二维码时，推送以下两种事件：
(1)如果用户还未关注公众号，则用户可以关注公众号，关注后微信会将带场景值关注事件推送给开发者。
(2)如果用户已经关注公众号，则微信会将带场景值扫描事件推送给开发者。
用户未关注时，进行关注后的事件推送
推送XML数据包示例：
123456789
注意上面EventKey的内容只取_之后的数字，用于获取weixin_qrcode_ticket表中scene_id对应的二维码图片。因为已经事先批量下载准备好二维码，无需通过Ticket方式再次获取。
三、相关源码
在接收到微信服务器发来的事件之后，首先由指定的接口网页AccessWx.aspx对事件类型进行判别，然后交给指定的事件处理类处理和回应。在本系列文章第1篇介绍的AccessWx.aspx.cs中开始部分引入命名空间using QinMing.Weixin.EventHandlerSubscribe;
并完善下面处理subscribe这一段，增加本篇给出的关注事件处理环节。
else if(MsgType == "event")
{
string Event = xn.SelectSingleNode("//Event").InnerText;
if(Event == "subscribe")
{
//对用户关注公众号的事件处理，使用QinMing.Weixin.EventHandlerSubscribe命名空间下的SubscribeEventDeal类
SubscribeEventDeal ued = new SubscribeEventDeal();
Response.Write(ued.DealResult(weixinXML));
}
}
在命名空间QinMing.Weixin.EventHandlerSubscribe下新建一个类SubscribeEventDeal，用来处理微信服务器发来的关注事件消息。记得类源码文件要放在App_Code目录下！下面是关注事件消息处理源码，这段在第（10）篇中讲过一部分，当时还没加入扫码带参数二维码的处理以及发红包处理。
QinMingWeixinEventHandlerSubscribe.cs文件内容如下：
using System;
using System.Web;
using System.Xml;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Net;
using System.Threading;
using System.Threading.Tasks;
using QinMing.Config;
using QinMing.Tools;
using QinMing.Tools.DB;
using QinMing.Weixin.ReturnContent;
using QinMing.WeixinUserInfo;
using QinMing.WeixinPayPayment;
namespace QinMing.Weixin.EventHandlerSubscribe
{
//事件消息处理：关注公众号
public class SubscribeEventDeal :System.Web.UI.Page
{
public string DealResult(string weixinXML)
{
string content = DealSubscribe(weixinXML);
return content;
}
public string DealSubscribe(string weixinXML)
{
string content1="";
string strresponse = "";
XmlDocument doc = new XmlDocument();
doc.LoadXml(weixinXML);
XmlNodeList list = doc.GetElementsByTagName("xml");
XmlNode xn = list[0];
string FromUserName = xn.SelectSingleNode("//FromUserName").InnerText; //关注用户的加密后openid
string ToUserName = xn.SelectSingleNode("//ToUserName").InnerText; //公众微信号原始ID
string MsgType=xn.SelectSingleNode("//MsgType").InnerText;
string Event=xn.SelectSingleNode("//Event").InnerText;
string EventKey = xn.SelectSingleNode("//EventKey").InnerText;
ReturnMsg rm = new ReturnMsg();
if(String.IsNullOrEmpty(EventKey)) //常规关注
{
DealJoin(FromUserName);
SaveEventCommon(FromUserName, ToUserName);
content1 = "欢迎您：nn"
+ "[玫瑰]超值优惠券[玫瑰]n"
+ "肯德基、麦当劳、汉堡王、德克士、必胜客、星巴克、Coco、猫眼、美团外卖、饿了么、滴滴等上百家全国知名连锁商家4折起优惠券，随时买随时用，无需加会员和预充值，全国门店通用！nn"
+ "点击这里购买！"
+ "nn"
+ "点击这里购买！！"
+ "nn"
+ "点击这里购买！！！"
+ "nn"
+ "您也可以通过菜单”超值优惠券“进入购买页面，总有惊喜在等您哦！";
strresponse = rm.ReturnText(FromUserName, ToUserName, content1);
//给管理员发送新粉丝关注通知
QinMing.WeixinTemplateMessage.SendTemplateMessage.SendRemindMsg("管理员openid", "新粉丝关注提醒(来源:普通关注)" + FromUserName, "http://www.yourweb.com/Weixin/DisplayOneUser.aspx?open_id=" + FromUserName); //告知管理员有新粉丝关注
}
else //扫描带参数的二维码关注，一人一码、一店一码
{
DealJoin(FromUserName);
string tmpEventKey = EventKey.Substring(EventKey.LastIndexOf("_") + 1);
string ticket = xn.SelectSingleNode("//Ticket").InnerText;
SaveEventScan(FromUserName, ToUserName, tmpEventKey, ticket);
if(tmpEventKey == "10") //某个指定的带参数二维码scene_id
{
}
else
{
strresponse = ScanWithQrCodeNew(FromUserName, ToUserName, tmpEventKey);
}
}
return strresponse;
}
//记录粉丝关注公众号时的相关信息
public void DealJoin(string FromUserName)
{
SqlConnection conn = new SqlConnection(QinMingConfig.DatabaseConnStr);
conn.Open();
SqlCommand cmd = new SqlCommand();
SqlDataReader dr;
cmd.Connection = conn;
cmd.CommandText = "insert into weixin_join_log (open_id,join_time,remove_flag) values('" + FromUserName + "',getdate(),0)";
cmd.ExecuteScalar();
cmd.CommandText = "select * from weixin_user_info where open_id ='" + FromUserName + "' ";
dr = cmd.ExecuteReader();
if(dr.Read())
{
dr.Close();
cmd.CommandText = "update weixin_user_info set remove_flag='已关注' where open_id='" + FromUserName + "'";
cmd.ExecuteScalar(); //新增粉丝如曾关注过，取关后重新关注的，变更状态
}
else
{
dr.Close();
cmd.CommandText = "insert into weixin_user_info (open_id,remove_flag,personal_score,join_time) values('" + FromUserName + "','已关注',0,getdate())";
cmd.ExecuteScalar(); //新增粉丝如曾未关注过，增加粉丝记录
//微信用户首次关注公众号时，发送一个随机红包。
SendNewUserRedPacket(FromUserName);
}
if (conn.State == ConnectionState.Open)
{
conn.Close();
conn.Dispose();
}
QinMingWeixinUserInfo wui=new QinMingWeixinUserInfo();
wui.UpdateUserInfo(FromUserName); //获取用户信息并更新weixin_user_info表
}
public void SendNewUserRedPacket(string open_id)
{
Random r = new Random();
string ran1 = r.Next(1000, 9999).ToString();
string ran2 = r.Next(随机红包最小值, 随机红包最大值).ToString();
string out_trade_no = QinMingConfig.Weixin_MchId + DateTime.Now.ToString("yyyyMMddHHmmss") + ran1;
QinMingWeixinPayPayment.SendRedPackOne("降价联盟", "新粉福利", open_id, ran2, "新粉关注红包", "", out_trade_no);
}
//用户扫描带参数的二维码时处理动作
public string ScanWithQrCodeNew(string FromUserName, string ToUserName, string EventKey)
{
string strresponse = "";
ReturnMsg rm = new ReturnMsg();
string guishu_mobile = "";
string guishu_name = "";
string guishu_type = "";
string scan_title = "";
string scan_title_sub = "";
string scan_image_url = "";
string scan_redirect_url = "";
string r_red_packet_min = "";
string r_red_packet_max = "";
SqlConnection conn = new SqlConnection(QinMingConfig.DatabaseConnStr);
conn.Open();
SqlCommand cmd = new SqlCommand();
SqlDataReader dr;
cmd.Connection = conn;
cmd.CommandText = "select * from weixin_qrcode_ticket where scene_id=" + EventKey + " ";
dr = cmd.ExecuteReader();
if(dr.Read())
{
if(dr["scan_type"].ToString() == "优惠券")
{
guishu_mobile = dr["user_id"].ToString();
guishu_name = dr["user_name"].ToString();
guishu_type = dr["scan_type"].ToString();
scan_title = dr["scan_title"].ToString();
scan_title_sub = dr["scan_title_sub"].ToString();
scan_image_url = dr["scan_image_url"].ToString();
scan_redirect_url = dr["scan_redirect_url"].ToString();
r_red_packet_min = dr["r_red_packet_min"].ToString(); //合伙人推荐单粉红包最小值
r_red_packet_max = dr["r_red_packet_max"].ToString(); //合伙人推荐单粉红包最大值
Random r = new Random();
int RandomRedpack = r.Next(int.Parse(r_red_packet_min), int.Parse(r_red_packet_max));
strresponse = rm.ReturnText(FromUserName,ToUserName,"欢迎您：[咖啡]nn"
+ "[玫瑰]超值优惠券[玫瑰]n"
+ "肯德基、麦当劳、汉堡王、德克士、必胜客、星巴克、Coco、猫眼、美团外卖、饿了么、滴滴等上百家全国知名连锁商家4折起优惠券，随时买随时用，无需加会员和预充值，全国门店通用！nn"
+ "点击这里购买！"
+ "nn"
+ "点击这里购买！！"
+ "nn"
+ "点击这里购买！！！"
+ "nn"
+ "您也可以通过菜单”超值优惠券“进入购买页面，总有惊喜在等您哦！");
dr.Close();
//给推荐的合伙人发红包，用生成红包记录自行提现方式;非首次扫码关注公众号，不发推荐红包包
if(int.Parse(QinMingToolsDB.SearchOneField("select count(*) r_m from weixin_user_info where open_id= '" + FromUserName + "'","r_m")) >= 1 )
{
//如果用户表中已经存在微信用户openid，则表示非首次关注，不给推荐人发红包
}
else
{
//如果用户表中没有微信用户openid，则表示首次关注，给推荐人发红包；在推荐红包表中追加记录，需推荐人自行提现
string test = CreateScanQrCodeRedpack(FromUserName, guishu_mobile, guishu_type, RandomRedpack.ToString());
}
//如果是带参数二维码扫码关注，更新新粉丝扫码推荐人归属信息。
cmd.CommandText = "update weixin_user_info set guishu_mobile='" + guishu_mobile + "',guishu_type ='" + guishu_type + "' where remove_flag='已关注' and open_id='" + FromUserName + "' ";
cmd.ExecuteScalar();
//告知管理员有新粉丝扫码关注
QinMing.WeixinTemplateMessage.SendTemplateMessage.SendRemindMsg("管理员openid", "新粉丝关注提醒(来源:" + guishu_name + ")" + FromUserName, "http://www.yourweb.com/Weixin/DisplayOneUser.aspx?open_id=" + FromUserName);
//插入带参数二维码被扫码的记录
cmd.CommandText = "insert into weixin_ad_image_read_log (share_qrcode_id,read_open_id,read_time) values ("
+ EventKey + ",'" + FromUserName + "',getdate())"; //EventKey对应的是weixin_qrcode_ticket表中的scene_id，二维码分配关系
cmd.ExecuteScalar();
}
else
{
dr.Close();
}
if (conn.State == ConnectionState.Open)
{
conn.Close();
conn.Dispose();
}
}
return strresponse;
}
//微信用户通过扫描带参数二维码关注公众号时，给推荐扫码的人追加一条红包记录
public string CreateScanQrCodeRedpack(string FromUserName, string guishu_mobile, string guishu_type, string redpack_fee)
{
string order_id = QinMingToolsDB.SearchOneField("select isnull(max(order_id),0)+1 r_num from weixin_redpack_log_yhq_spread","r_num");
string fromopenid = QinMingToolsDB.SearchOneField("select open_id from weixin_bind_mobile_all where mobile = '"+ guishu_mobile +"'","open_id");
string scene_id = QinMingToolsDB.SearchOneField("select top 1 * from weixin_qrcode_ticket where user_id = '"+ guishu_mobile +"' and scan_type = '"+ guishu_type +"'","scene_id");
string fromname = QinMingToolsDB.SearchOneField("select top 1 * from weixin_qrcode_ticket where user_id = '"+ guishu_mobile +"' and scan_type = '"+ guishu_type +"'","user_name");
string strsql = "insert into weixin_redpack_log_yhq_spread(order_id,open_id,gen_time,redpack_class,redpack_fee,scene_id,from_user_id,from_user_name,from_open_id,remark,out_trade_no) n"+
"values("+ order_id +",'"+ FromUserName +"',getdate(),'优惠券推荐新粉红包',"+ redpack_fee +",'"+ scene_id +"','"+ guishu_mobile +"','"+ fromname +"','"+ fromopenid +"','','')n";
QinMingToolsDB.InsertTable(strsql);
return "2"; //用户
}
//保存普通关注事件信息。
public void SaveEventCommon(string FromUserName, string ToUserName)
{
SqlConnection conn = new SqlConnection(QinMingConfig.DatabaseConnStr);
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "insert into weixin_recv_event (msg_type,event_type,open_id,gh_id,recv_time) "
+ "values ('event','subscribe','" + FromUserName + "','" + ToUserName + "',getdate()) ";
QinMingTools.WriteLog("sql语句：", cmd.CommandText);
cmd.ExecuteScalar();
if (conn.State == ConnectionState.Open)
{
conn.Close();
conn.Dispose();
}
}
//保存扫描带参数二维码事件信息。
public void SaveEventScan(string FromUserName, string ToUserName,string EventKey, string Ticket)
{
SqlConnection conn = new SqlConnection(QinMingConfig.DatabaseConnStr);
conn.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "insert into weixin_recv_event (msg_type,event_type,open_id,gh_id,recv_time,event_key,ticket) "
+ "values ('event','subscribe','" + FromUserName + "','" + ToUserName + "',getdate(),'" + EventKey + "','" + Ticket + "') ";
QinMingTools.WriteLog("sql语句：", cmd.CommandText);
cmd.ExecuteScalar();
if (conn.State == ConnectionState.Open)
{
conn.Close();
conn.Dispose();
}
}
}
}
上面代码中用到了数据库操作类Tools.DB；还有微信支付类QinMingWeixinPayPayment中的发送红包操作SendRedPackOne，后期讲解微信支付时给出源码。
四、应用演示
1、新粉丝红包
2、合伙人推荐红包
收到红包的感觉是不是很爽？
