使用Json.NET来序列化所需的数据

    //初始化组织机构列表
    function initDeptTreeview() {
        $("#loading").show();

        $(‘#treeDept‘).tree({
            url: ‘/User/GetMyDeptTreeJson?userId=@Session["UserId"]‘,
            onClick: function (node) {
                loadDataByOu(node.id);
            }
          });

        $("#loading").fadeOut(500);
    }

                $(‘#lbxRoles‘).empty();
                $.getJSON("/Role/GetRolesByUser?r=" + Math.random() + "&userid=" + info.ID, function (json) {
                    $.each(json, function (i, item) {
                        $(‘#lbxRoles‘).append(‘‘ + item.Name + ‘‘);
                    });
                });

[JsonProperty( NullValueHandling = NullValueHandling.Ignore)]

        [JsonProperty(PropertyName = "checked", NullValueHandling = NullValueHandling.Ignore)]
        public bool? Checked { get; set; }

    /// 

    /// 定义EasyUI树的相关数据，方便控制器生成Json数据进行传递
    /// 
    [DataContract]
    [Serializable]
    public class EasyTreeData
    {
        /// 

        /// ID
        /// 
        [DataMember]
        public string id { get; set; }

        /// 

        /// 节点名称
        /// 
        [DataMember]
        public string text { get; set; }
        
        /// 

        /// 是否展开
        /// 
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
        [DataMember]
        public string state  { get; set; }

        /// 

        /// 图标样式
        /// 
        [DataMember]
        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
public string iconCls { get; set; }

        [JsonProperty(PropertyName = "checked", NullValueHandling = NullValueHandling.Ignore)]
        [DataMember(Name="checked")]
        public bool? Checked { get; set; }


        /// 

        /// 子节点集合
        /// 
        [DataMember]
        public List children { get; set; }

[
 {
    id: "-1",
    text: "无",
    state: "open",
    checked: true,
    children: [ ] 
 },
 {
    id: "6",
    text: "总经办",
    state: "open",
    iconCls: "icon-group",
    children: [ ]
 }
]

{"total":2,"count":2,"data":{"openid":["","OPENID1","OPENID2"]},"next_openid":"NEXT_OPENID"}

{
    "group": {
        "id": 107, 
        "name": "test"
    }
}

    /// 

    /// Json字符串操作辅助类
    /// 
    public class JsonHelper where T : class, new()
    {
        /// 

        /// 检查返回的记录，如果返回没有错误，或者结果提示成功，则不抛出异常
        /// 
        /// 返回的结果
        /// 
        private static bool VerifyErrorCode(string content)
        {
            if (content.Contains("errcode"))
            {
                ErrorJsonResult errorResult = JsonConvert.DeserializeObject(content);
                //非成功操作才记录异常，因为有些操作是返回正常的结果（{"errcode": 0, "errmsg": "ok"}）
                if (errorResult != null && errorResult.errcode != ReturnCode.请求成功)
                {
                    string error = string.Format("微信请求发生错误！错误代码：{0}，说明：{1}", (int)errorResult.errcode, errorResult.errmsg);
                    LogTextHelper.Error(errorResult);

                    throw new WeixinException(error);//抛出错误
                }
            }
            return true;
        }

        /// 

        /// 转换Json字符串到具体的对象
        /// 
        /// 返回Json数据的链接地址
        /// 
        public static T ConvertJson(string url)
        {
            HttpHelper helper = new HttpHelper();
            string content = helper.GetHtml(url);
            VerifyErrorCode(content);

            T result = JsonConvert.DeserializeObject(content);
            return result;
        }
}

JsonConvert.SerializeObject(obj, Formatting.Indented);