{
  "button":[
  { 
   "type":"click",
   "name":"今日歌曲",
   "key":"V1001_TODAY_MUSIC"
  },
  {
   "name":"菜单",
   "sub_button":[
   { 
    "type":"view",
    "name":"搜索",
    "url":"http://www.soso.com/"
   },
   {
    "type":"view",
    "name":"视频",
    "url":"http://v.qq.com/"
   },
   {
    "type":"click",
    "name":"赞一下我们",
    "key":"V1001_GOOD"
   }]
  }]
 }

/// <summary>
/// 创建菜单事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void createMenu_Click(object sender, EventArgs e)
{
　　　FileStream fs1 = new FileStream(Server.MapPath("~/") + "\\menuInfo.txt", FileMode.Open);
　　　StreamReader sr = new StreamReader(fs1, Encoding.GetEncoding("GBK"));
　　　string menu = sr.ReadToEnd();
　　　sr.Close();
　　　fs1.Close();
　　　CreateMenu("https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN", menu);
}

/// <summary>
/// 创建公众号菜单
/// </summary>
/// <param name="posturl">URL</param>
/// <param name="postData">菜单JSON数据</param>
/// <returns></returns>
public void CreateMenu(string posturl, string postData)
{
　　　Stream outstream = null;
　　　Stream instream = null;
　　　StreamReader sr = null;
　　　HttpWebResponse response = null;
　　　HttpWebRequest request = null;
　　　Encoding encoding = Encoding.UTF8;
　　　byte[] data = encoding.GetBytes(postData);
　　　request = WebRequest.Create(posturl) as HttpWebRequest;
　　　CookieContainer cookieContainer = new CookieContainer();
　　　request.CookieContainer = cookieContainer;
  request.AllowAutoRedirect = true;
  request.Method = "POST";
  request.ContentType = "application/x-www-form-urlencoded";
  request.ContentLength = data.Length;
  outstream = request.GetRequestStream();
  outstream.Write(data, 0, data.Length);
  outstream.Close();
  response = request.GetResponse() as HttpWebResponse;
  instream = response.GetResponseStream();
  sr = new StreamReader(instream, encoding);
  string content = sr.ReadToEnd();
  Context.Response.Write(content);
}