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, @"\r\n", ""));
                 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") == "" ?  : Convert.ToInt32(item.GetValue("_Page"));
                     int PageSize = item.GetValue("_PageSize") == "" ?  : Convert.ToInt32(item.GetValue("_PageSize"));
                     int Type = item.GetValue("_Type") == "" ?  : Convert.ToInt32(item.GetValue("_Type"));
                     int Status = item.GetValue("_Status") == "" ?  : Convert.ToInt32(item.GetValue("_Status"));
                     int LoginId = item.GetValue("_LoginId") == "" ?  : Convert.ToInt32(item.GetValue("_LoginId"));
                     string Profession = item.GetValue("_Profession");
                     StringBuilder sbSqlWhere = new StringBuilder();
                     sbSqlWhere.Append(" PersonIsdel=0");
                     if (Status > ) { sbSqlWhere.AppendFormat(" and State={0}", Status); }
                     if (LoginId > ) { 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[].Rows.Count > )
                     {
                           //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[].Rows.Count > )
             {
                 DataTable dt = ds.Tables[];
                 sbStr.Clear();
                 sbStr.Append(EasyUIJsonHelper.TableToJson(dt));
             }
             return sbStr.ToString();
         }
         #endregion