简单创建微信公众菜单

分别准备两个实体类（DTO）：方便构造json对象

需要用到两个引用包，没有的可以在线执行命令install-package 包名 下载

using Newtonsoft.Json;
using System.Net.Http;

1.主菜单DTO

public class WxMenuDTO
    {
        public string type { get; set; }
        public string name { get; set; }
        public string key { get; set; }
        public string url { get; set; }
        public IEnumerable<Sub_Button> sub_button { get; set; }
    }

2.子菜单DTO

public class Sub_Button
    {
        public string type { get; set; }
        public string name { get; set; }
        public string key { get; set; }
        public string url { get; set; }
    }

3.控制器

public ActionResult Index()
        {
           //获取token
                        Access_Token_Tool access_Token_Tool = new Access_Token_Tool();
                        string access_token = access_Token_Tool.getAccess_Token();
            
            
                        //自定义菜单(一级菜单)
                        List<WxMenuDTO> wxMenuDTOs = new List<WxMenuDTO>();
                        wxMenuDTOs.Add(new WxMenuDTO
                        {
                            name = "后端",
                            sub_button = new List<WxMenuDTO>() {//二级菜单
                            new WxMenuDTO(){ type = "click", name = "EF", key = "go_ef", url = null },
                            new WxMenuDTO(){ type = "click", name = "MVC", key = "go_mvvc", url = null },
                            new WxMenuDTO(){ type = "click", name = "Core", key = "go_core", url = null },
                            new WxMenuDTO(){ type = "view", name = "了解更多", key = "go_hmoreandmore", url = "http://www.tnblog.net/Shangjin123/article/details/2965" }
                        }
                        });
                        wxMenuDTOs.Add(new WxMenuDTO
                        {
                            name = "前端",
                            sub_button = new List<WxMenuDTO>() {//二级菜单
                            new WxMenuDTO(){ type = "click", name = "JavaScript", key = "go_javacript", url = null },
                            new WxMenuDTO(){ type = "click", name = "jQuery", key = "go_jquery", url = null },
                            new WxMenuDTO(){ type = "click", name = "CSS", key = "go_css", url = null },
                             new WxMenuDTO(){ type = "click", name = "HTML", key = "go_html", url = null },
                            new WxMenuDTO(){ type = "view", name = "了解更多", key = "go_qmoerandmoer", url = "http://www.tnblog.net/Shangjin123/article/details/2965" }
                        }
                        });
                        wxMenuDTOs.Add(new WxMenuDTO
                        {
                            name = "数据库",
                            sub_button = new List<WxMenuDTO>() {//二级菜单
                            new WxMenuDTO(){ type = "click", name = "MySQL", key = "go_mysql", url = null },
                            new WxMenuDTO(){ type = "click", name = "SqlServer", key = "go_sqlserver", url = null },
                            new WxMenuDTO(){ type = "click", name = "Oracle", key = "go_oracle", url = null },
                             new WxMenuDTO(){ type = "scancode_push", name = "扫一扫", key = "go_sucandb", url = null },
                            new WxMenuDTO(){ type = "view", name = "了解更多", key = "go_dbmoerandmoer", url = "http://www.tnblog.net/Shangjin123/article/details/2965" }
                        }
                        });
            
            
                        //添加button
                        var tempobj = new { button = wxMenuDTOs };
            
                        //设置json忽略空值
                        JsonSerializerSettings jsonSerializerSettings = new JsonSerializerSettings();
                        jsonSerializerSettings.NullValueHandling = NullValueHandling.Ignore;
            
                        //序列化成字符串
                        string json = JsonConvert.SerializeObject(tempobj, jsonSerializerSettings);
                        //添加参数(post的参数)
                        StringContent stringContent = new StringContent(json);
            
                        //调用自定义菜单接口
                        HttpClient httpClient = new HttpClient();
                        string result = httpClient.PostAsync("https://api.weixin.qq.com/cgi-bin/menu/create?access_token=" + access_token, stringContent).Result.Content.ReadAsStringAsync().Result;
            
                        return Json(result, JsonRequestBehavior.AllowGet);
        }