微信公众号开发之设置自定义菜单实例代码

本实例是为了实现在管理后台实现微信菜单的添加删除管理。

1、首先我们需要新建一个数据库表用于存放menu菜单项

可包含的字段有id、父类id、name、排序、是否显示、类型（view、click）、链接、adddate

注意后台存menu菜单数据时，parentId=-1为一级菜单，或parendId为一级菜单的id作为该一级菜单下的二级菜单

2、在设置菜单时需要向微信接口传menuJson字符串，所以要先拼接字符串，后台定义一个creatMenu()

public bool creatMenu() 
    { 
      string menuJson = ""; 
      //这里默认parentId=-1为最外层菜单，isactive=1为显示,responseType=1为click类型 
      DataTable dtAMenu = Service.SelectDataTable("id, name, responseType, jsonStr,url", "WEIXINMENU", " parentId=-1 and isactive=1 order by sort"); 
      if (dtAMenu.Rows.Count > 0) 
      { 
 menuJson = "{"button":["; 
 for (int i = 0; i < dtAMenu.Rows.Count; i++) 
 { 
   DataTable dtBMenu = Service.SelectDataTable("id, name, responseType, jsonStr,url", wx, " parentId=" + dtAMenu.Rows[i]["id"].ToString() + " and isactive=1 order by sort"); 
   if (dtBMenu.Rows.Count > 0) 
   { 
     menuJson += "{"name":"" + dtAMenu.Rows[i]["name"].ToString() + "","sub_button":["; 
     for (int j = 0; j < dtBMenu.Rows.Count; j++) 
     { 
if (Convert.ToInt32(dtBMenu.Rows[j]["responseType"]) == 2) 
{ 
  menuJson += "{"type":"view","name":"" + dtBMenu.Rows[j]["name"].ToString() + "","url":"" + dtBMenu.Rows[j]["jsonStr"].ToString() + ""},"; 
} 
else 
{ 
  menuJson += "{"type":"click","name":"" + dtBMenu.Rows[j]["name"].ToString() + "","key":"eventKey_" + dtBMenu.Rows[j]["id"].ToString() + ""},"; 
} 
     } 
     menuJson = menuJson.TrimEnd(','); 
     menuJson += "]},"; 
   } 
   else 
   { 
     //if (Convert.ToInt32(dtAMenu.Rows[i]["responseType"]) == 2) 
     //{ 
menuJson += "{"type":"view","name":"" + dtAMenu.Rows[i]["name"].ToString() + "","url":"" + dtAMenu.Rows[i]["jsonStr"].ToString() + ""},"; 
     //} 
     //else 
     //{ 
     //  menuJson += "{"type":"click","name":"" + dtAMenu.Rows[i]["name"].ToString() + "","key":"eventKey_" + dtAMenu.Rows[i]["id"].ToString() + ""},"; 
     //} 
   } 
   dtBMenu.Dispose(); 
 } 
 dtAMenu.Dispose(); 
 menuJson = menuJson.TrimEnd(','); 
 menuJson += "]}"; 
 menuJson = menuJson.Trim(); 
 return requstZmToCreatMent(menuJson); 
      } 
      else 
      { 
 return false; 
      } 
    } 

3、获取到menujson字符串后调用微信接口创建菜单，需先获取assess token,有关assess token获取可参考：获取AccessToken

/// 
 
    /// 向微信服务器请求创建自定义菜单 
    /// 
 
    ///  
    ///  
    ///  
    private bool requstZmToCreatMent(string jsonStr) 
    { 
      try 
      { 
 var AccessToken = "";//accesstoken需例外获取，一般可开始时获取后存数据库，下次从数据库取，注意accesstoken有效期为7200秒 
 //声明一个HttpWebRequest请求 
 string interfaceUrl = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=" + AccessToken; 
 HttpWebRequest request = (HttpWebRequest)WebRequest.Create(interfaceUrl); 
 //设置连接超时时间  
 request.Timeout = 30000; 
 request.KeepAlive = true; 
 Encoding encodeType = Encoding.GetEncoding("UTF-8"); 
 request.Headers.Set("Pragma", "no-cache"); 
 request.Method = "POST"; 
 request.ContentType = "application/x-www-form-urlencoded"; 
 request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; Maxthon; .NET CLR 1.1.4322); Http STdns"; 
 request.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*"; 
 request.cookieContainer = new cookieContainer(); 
 byte[] Bytes = encodeType.GetBytes(jsonStr); 
 request.ContentLength = Bytes.Length; 
 request.AllowAutoRedirect = true; 
 //发送数据 
 using (Stream writer = request.GetRequestStream()) 
 { 
   writer.Write(Bytes, 0, Bytes.Length); 
   writer.Close(); 
 } 
 StringBuilder strb = new StringBuilder(); 
 //接收数据 
 using (Stream reader = request.GetResponse().GetResponseStream()) 
 { 
   StreamReader sr = new StreamReader(reader, encodeType); 
   strb.Append(sr.ReadToEnd()); 
   sr.Close(); 
   reader.Close(); 
 } 
 if ((strb.ToString().IndexOf(""errcode":42001") != -1) || (strb.ToString().IndexOf(""errcode":40001") != -1) || (strb.ToString().IndexOf(""errcode":40014") != -1) || (strb.ToString().IndexOf(""errcode":41001") != -1)) //access_token错误 
 { 
   // AccessToken = getAccessToken(); 
   getzmAccessToken(); 
   return requstZmToCreatMent(jsonStr); 
 } 
 else 
 { 
   if (strb.ToString() == "{"errcode":0,"errmsg":"ok"}") 
   { 
     return true; 
   } 
   else 
   { 
     return false; 
   } 
 } 
      } 
      catch (Exception exp) 
      { 
 return false; 
      } 
    } 

总结

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