c#输出json,其中包含子json （可以含 无限级 子json）的方法思路

首页 给出  DataTable 转Json 的方法：

   public static string TableToJson(DataTable dt)
        {
            List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();
            foreach (DataRow dr in dt.Rows)//每一行信息，新建一个Dictionary<string,object>,将该行的每列信息加入到字典
            {
                Dictionary<string, object> result = new Dictionary<string, object>();
                foreach (DataColumn dc in dt.Columns)
                {
                    result.Add(dc.ColumnName, dr[dc].ToString());
                }
                list.Add(result);
            }
            return ToJson(list);//调用Serializer方法 
        }

  /// <summary>
        /// 将集合转换为json
        /// </summary>
        /// <param name="d"></param>
        /// <returns></returns>
        public static string ToJson(object d)
        {
            JavaScriptSerializer jss = new JavaScriptSerializer();
            return jss.Serialize(d);
        }

具体  转换实例：

#region 获取我的订单
        public string GetMyOrders(string _StrJson)
        {
            StringBuilder sbStr = new StringBuilder();
            sbStr.Append("[{"msg":"获取失败,参数错误。","data":"[]","state":"2"}]");
            try
            {
                CommonJsonModel oModel = new CommonJsonModel(Regex.Replace(_StrJson, @"
", ""));
                List<CommonJsonModel> lst = oModel.GetCollection();
                foreach (CommonJsonModel item in lst)
                {
                    //[{"_Page":"1","_PageSize":"10","_Type":"1","_Status":"0","_LoginId":"15","_Profession":"390"}]
                    int Page = item.GetValue("_Page") == "" ? 1 : Convert.ToInt32(item.GetValue("_Page"));
                    int PageSize = item.GetValue("_PageSize") == "" ? 10 : Convert.ToInt32(item.GetValue("_PageSize"));
                    int Type = item.GetValue("_Type") == "" ? 0 : Convert.ToInt32(item.GetValue("_Type"));
                    int Status = item.GetValue("_Status") == "" ? 0 : Convert.ToInt32(item.GetValue("_Status"));
                    int LoginId = item.GetValue("_LoginId") == "" ? 0 : Convert.ToInt32(item.GetValue("_LoginId"));
                    string Profession = item.GetValue("_Profession");
                    StringBuilder sbSqlWhere = new StringBuilder();
                    sbSqlWhere.Append(" PersonIsdel=0");
                    if (Status > 0) { sbSqlWhere.AppendFormat(" and State={0}", Status); }
                    if (LoginId > 0) { sbSqlWhere.AppendFormat(" and AddPerson={0}", LoginId); }
                    if (Profession != "")
                    {
                        sbSqlWhere.AppendFormat(" and BusinessId in(select ID from TB_Business where Profession={0})", Profession);
                    }
                    StringBuilder sbFields = new StringBuilder();
                    sbFields.AppendFormat("*", Type);
                    DataSet ds = bll.GetList("TB_BusinessOrders", sbFields.ToString(), "AddTime", PageSize, Page, false, true, sbSqlWhere.ToString());
                    if (ds != null && ds.Tables[0].Rows.Count > 0)
                    {
                           //第一个DataTable
                        DataTable dt = ds.Tables[0];
                            //新增一列子集
                        dt.Columns.Add("OrdelDetailList");
                        foreach (DataRow dr in dt.Rows)
35                         {
36                             dr["OrdelDetailList"] = GetOrderDetailList(dr["ID"].ToString());
37                         }
                        sbStr.Clear();
                           //整 个DataTable转Json 
                        string strTemp = EasyUIJsonHelper.TableToJson(ds.Tables[0]);
                           //去除多余的括号转义符号
40                         strTemp = strTemp.Replace("\", "");
41                   strTemp = strTemp.Replace(""[{", "[{");
42                   strTemp = strTemp.Replace("}]"", "}]");
                     // 完毕
                        sbStr.Append("[{"msg":"获取成功。","data":" + strTemp + ","state":"0"}]");
                    }
                    else
                    {
                        sbStr.Clear();
                        sbStr.Append("[{"msg":"获取成功,无匹配数据。","data":"[]","state":"0"}]");
                    }
                }
            }
            catch { }
            return sbStr.ToString();
        }

        private string GetOrderDetailList(string orderId)
        {
            StringBuilder sbStr = new StringBuilder();
            DataSet ds = new ZhouFu.Bll.TB_BusinessOrdersDetail().GetList("OrderId=" + orderId);
            if (ds != null && ds.Tables[0].Rows.Count > 0)
            {
                DataTable dt = ds.Tables[0];
                sbStr.Clear();
                sbStr.Append(EasyUIJsonHelper.TableToJson(dt));
            }
            return sbStr.ToString();
        }
        #endregion