我为自己的笑话网开发了一个微信公众平台的接口，在这里分享给大家，希望能对朋友们有帮助，如果有什么地方写的不好，好请大家指点！
首先是要进行认证，认证的时候，只需要在Page_Load事件里面单独去执行 认证的方法就可以了，具体代码见下面的RenZheng()
认证通过之后就可以对网友的消息进行处理，可以根据微信平台推送过来的数据进行分析！我相信大家在看到这篇文章的时候，在此之前肯定对平台都有所了解了，所以，废话不多说，直接上代码！ 如果有什么疑问的欢迎加群：242384606 进行讨论！
protected void Page_Load(object sender, EventArgs e)
{
wxmessage wx = GetWxMessage();
string res = "";
//新用户添加
if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "subscribe")
{
string content = "";
content = "/:rose欢迎关注52冷笑话/:rose\n看笑话请直接回复“x”\n无聊时候还可以找我聊聊天哦！";
res = sendTextMessage(wx, content);
}
else
{
bool sendJoke = false;
//看笑话
List<string> xhList = new List<string>() { "x", "笑话", "笑話" };
foreach (string item in xhList)
{
if (wx.Content.Trim().ToLower().Contains(item))
{
sendJoke = true;
break;
}
}
if (sendJoke)
{
JokeDemo joke = GetJoke(wx.FromUserName);
if (string.IsNullOrEmpty(joke.Img))
{
string title = string.Format("编号{0}:{1}\n-----------------\n", joke.ID, joke.Title);
string content = joke.Content;
if (content.Length > 300)
{
content = GetSubString(content, 300) + "\n-----------------\n点击连接阅读全文：URL" }
res = sendTextMessage(wx, title + content);
}
else
{
res = sendPictureMessage(wx, joke);
}
}
//智能学聊天
if (res == "" && Regex.IsMatch(wx.Content, "问(:|：)(.+?)答(:|：)(.+?)", RegexOptions.IgnoreCase))
{
string content = "";
string key = Regex.Match(wx.Content, "问(:|：)(.+?)答(:|：)(.+?)", RegexOptions.IgnoreCase).Groups[2].Value.Trim();
int startIndex = wx.Content.IndexOf("答:") + 2;
if (startIndex < 3)
{
startIndex = wx.Content.IndexOf("答：") + 2;
}
string rep = wx.Content.Substring(startIndex, wx.Content.Length - startIndex).Trim(); // Regex.Match(wx.Content, "问(:|：)(.+?)答(:|：)(.+?)", RegexOptions.IgnoreCase).Groups[4].Value;
if ((new ChatBLL()).isExists(key))
{
content = "/::)O啦！学会啦\n不信你问问！";
}
else
{
if ((new ChatBLL()).Add(key, rep) > 0)
{
content = "好啦，这个问题我学会啦！\n你现在提问我吧！/::P";
}
else
{
content = "糟糕了，系统出了点儿小意外！\n麻烦你再试一次！";
}
}
res = sendTextMessage(wx, content);
}
//未知情况
if (res == "")
{
string content = (new ChatBLL()).GetReplyByKey(wx.Content.Trim());
if (content == "")
{
content = "/:,@-D啊哦，你在说什么？\n你可以按照下面的格式告诉我：\n问：你说的话 答：你想让我说什么\n看笑话请直接回复“x”！";
}
res = sendTextMessage(wx, content);
}
}
Response.Write(res);
} /// <summary>
/// 发送文字消息
/// </summary>
/// <param name="wx">获取的收发者信息</param>
/// <param name="content">笑话内容</param>
/// <returns></returns>
private string sendTextMessage(wxmessage wx, string content)
{
string res = string.Format("<xml><ToUserName><![CDATA[{0}]]></ToUserName><FromUserName><![CDATA[{1}]]></FromUserName><CreateTime>{2}</CreateTime><MsgType><![CDATA[text]]></MsgType> <Content><![CDATA[{3}]]></Content> <FuncFlag>0</FuncFlag></xml> ",
wx.FromUserName, wx.ToUserName, DateTime.Now, 内容);
return res;
} /// <summary>
/// 发送图文消息
/// </summary>
/// <param name="wx">获取的收发者信息</param>
/// <param name="joke">笑话信息</param>
/// <returns></returns>
private string sendPictureMessage(wxmessage wx, JokeDemo joke)
{
StringBuilder sb = new StringBuilder();
sb.AppendFormat("<xml><ToUserName><![CDATA[{0}]]></ToUserName>", wx.FromUserName);
sb.AppendFormat("<FromUserName><![CDATA[{0}]]></FromUserName>", wx.ToUserName);
sb.AppendFormat("<CreateTime>{0}</CreateTime>", DateTime.Now);
sb.AppendFormat("<MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content>");
sb.AppendFormat("<ArticleCount>1</ArticleCount>");
sb.AppendFormat("<Articles><item>");
sb.AppendFormat("<Title><![CDATA[{0}]]></Title>", 标题);
sb.AppendFormat("<Description><![CDATA[{0}]]></Description>", 说明文字);
sb.AppendFormat("<PicUrl><![CDATA[{0}]]></PicUrl>", 图片地址);
sb.AppendFormat("<Url><![CDATA[{0}]]></Url>", 连接地址);
sb.AppendFormat("</item></Articles><FuncFlag>0</FuncFlag></xml>");
return sb.ToString();
} /// <summary>
/// 获取请求过来的微信信息
/// </summary>
/// <returns></returns>
private wxmessage GetWxMessage()
{
wxmessage wx = new wxmessage();
StreamReader str = new StreamReader(Request.InputStream, System.Text.Encoding.UTF8);
XmlDocument xml = new XmlDocument();
xml.Load(str);
wx.ToUserName = xml.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;
wx.FromUserName = xml.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;
wx.MsgType = xml.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;
if (wx.MsgType.Trim() == "text")
{
wx.Content = xml.SelectSingleNode("xml").SelectSingleNode("Content").InnerText;
}
if (wx.MsgType.Trim() == "event")
{
wx.EventName = xml.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;
}
return wx;
} /// <summary>
/// 微信认证
/// </summary>
private void RenZheng()
{
#region 微信认证
//string res = "";
//string token = "52lxh";
//string signature = Request["signature"];
//string timestamp = Request["timestamp"];
//string nonce = Request["nonce"];
//string echostr = Request["echostr"];
//if (string.IsNullOrEmpty(token) || string.IsNullOrEmpty(signature) || string.IsNullOrEmpty(timestamp) || string.IsNullOrEmpty(nonce) || string.IsNullOrEmpty(echostr))
//{
// using (StreamWriter sw = new StreamWriter(Server.MapPath("wx.txt")))
// {
// sw.Write("参数错误" + Request.Url);
// }
//}
//else
//{
// ArrayList arr = new ArrayList() { token, timestamp, nonce };
// arr.Sort();
// string signature1 = GetSHA1(arr[0].ToString() + arr[1].ToString() + arr[2].ToString());
// if (signature == signature1.ToLower())
// {
// res = echostr;
// }
// else
// {
// res = "error";
// } // Response.Write(res);
//}
#endregion
} /// <summary>
/// 加密字符串
/// </summary>
/// <param name="password"></param>
/// <returns></returns>
private string GetSHA1(string password)
{
string shh1string = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(password, "SHA1");
return shh1string;
} /// <summary>
/// 截取字符串
/// </summary>
/// <param name="content"></param>
/// <param name="length"></param>
/// <returns></returns>
private string GetSubString(string content, int length)
{
if (content.Length >= length)
{
return content.Substring(0, length);
}
else
{
return content;
}
} //自定义一个微信消息实体类
class wxmessage
{
public string FromUserName { get; set; }
public string ToUserName { get; set; }
public string MsgType { get; set; }
public string EventName { get; set; }
public string Content { get; set; }
}
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