dataset datatable 转json

    class ToJosn
    {
        #region dataTable转换成Json格式
        /// <summary>      
        /// dataTable转换成Json格式      
        /// </summary>      
        /// <param name="dt"></param>      
        /// <returns></returns>      
        public static string ToJson(ArrayList aliJson)
        {
            StringBuilder sbuBuilder = new StringBuilder();
            sbuBuilder.Append("{\"Value\":[");
            for (int i = 0; i < aliJson.Count; i++)
            {
                sbuBuilder.Append("\"");
                sbuBuilder.Append(aliJson[i].ToString().Replace("\"", "\\\""));
                sbuBuilder.Append("\",");
            }
            if (aliJson.Count > 0)
            {
                sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
            }
            sbuBuilder.Append("]}");
            string strJson = sbuBuilder.ToString();
            strJson = strJson.Replace("\n", "<br />");
            strJson = strJson.Replace("\r", "<br />");
            return strJson;//sbuBuilder.ToString();
        }
        public static string ToJson(DataTable dtaJson)
        {
            StringBuilder sbuBuilder = new StringBuilder();
            sbuBuilder.Append("{\"Rows\":[");
            for (int i = 0; i < dtaJson.Rows.Count; i++)
            {
                sbuBuilder.Append("[");
                for (int j = 0; j < dtaJson.Columns.Count; j++)
                {
                    sbuBuilder.Append("\"");
                    sbuBuilder.Append(dtaJson.Rows[i][j].ToString().Replace("\"", "\\\"").Replace("\r\n", "<br>"));
                    sbuBuilder.Append("\",");
                }
                sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
                sbuBuilder.Append("],");
            }
            if (dtaJson.Rows.Count > 0)
            {
                sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
            }
            sbuBuilder.Append("]}");

            string strJson = sbuBuilder.ToString();
            strJson = strJson.Replace("\n", "<br />");
            strJson = strJson.Replace("\r", "<br />");

            return strJson;//sbuBuilder.ToString();
        }

        #endregion dataTable转换成Json格式

        #region DataSet转换成Json格式
        /// <summary>      
        /// DataSet转换成Json格式      
        /// </summary>      
        /// <param name="ds">DataSet</param>      
        /// <returns></returns>      
        public static string ToJson(DataSet dseJson)
        {
            StringBuilder sbuBuilder = new StringBuilder();
            sbuBuilder.Append("{\"Tables\":[");
            foreach (DataTable dtJson in dseJson.Tables)
            {
                sbuBuilder.Append(ToJson(dtJson) + ",");
            }
            sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
            sbuBuilder.Append("]}");

            string strJson = sbuBuilder.ToString();
            strJson = strJson.Replace("\n", "<br />");
            strJson = strJson.Replace("\r", "<br />");
            return strJson;//sbuBuilder.ToString();
        }
        #endregion



        /// <summary>
        /// 带表头的
        /// </summary>
        /// <param name="dtaJson"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static string ToJson(DataTable dtaJson, bool b)
        {
            StringBuilder sbuBuilder = new StringBuilder();
            sbuBuilder.Append("{\"Rows\":[");
            for (int i = 0; i < dtaJson.Rows.Count; i++)
            {
                sbuBuilder.Append("{");
                for (int j = 0; j < dtaJson.Columns.Count; j++)
                {

                    sbuBuilder.Append("\"" + dtaJson.Columns[j].ColumnName + "\":");
                    sbuBuilder.Append("\"");
                    sbuBuilder.Append(dtaJson.Rows[i][j].ToString().Replace("\"", "\\\"").Replace("\r\n", "<br>"));
                    sbuBuilder.Append("\",");
                }
                sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
                sbuBuilder.Append("},");
            }
            if (dtaJson.Rows.Count > 0)
            {
                sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
            }
            sbuBuilder.Append("]}");

            string strJson = sbuBuilder.ToString();
            strJson = strJson.Replace("\n", "<br />");
            strJson = strJson.Replace("\r", "<br />");

            return strJson;//sbuBuilder.ToString();
        }

        /// <summary>
        /// 带表头的
        /// </summary>
        /// <param name="dseJson"></param>
        /// <returns></returns>
        public static string ToJson(DataSet dseJson, bool b)
        {
            StringBuilder sbuBuilder = new StringBuilder();
            sbuBuilder.Append("{\"Tables\":[");
            foreach (DataTable dtJson in dseJson.Tables)
            {
                sbuBuilder.Append(ToJson(dtJson, true) + ",");
            }
            sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
            sbuBuilder.Append("]}");


            string strJson = sbuBuilder.ToString();
            strJson = strJson.Replace("\n", "<br />");
            strJson = strJson.Replace("\r", "<br />");
            return strJson;//sbuBuilder.ToString();
        }



        /// <summary>
        /// 将JSON解析成DataSet只限标准的JSON数据
        /// 例如：Json＝{t1:[{name:'数据name',type:'数据type'}]} 
        /// 或 Json＝{t1:[{name:'数据name',type:'数据type'}],t2:[{id:'数据id',gx:'数据gx',val:'数据val'}]}
        /// </summary>
        /// <param name="Json">Json字符串</param>
        /// <returns>DataSet</returns>
        public static DataSet JsonToDataSet(string Json)
        {
            try
            {
                DataSet ds = new DataSet();
                JavaScriptSerializer JSS = new JavaScriptSerializer();


                object obj = JSS.DeserializeObject(Json);
                Dictionary<string, object> datajson = (Dictionary<string, object>)obj;


                foreach (var item in datajson)
                {
                    DataTable dt = new DataTable(item.Key);
                    object[] rows = (object[])item.Value;
                    foreach (var row in rows)
                    {
                        Dictionary<string, object> val = (Dictionary<string, object>)row;
                        DataRow dr = dt.NewRow();
                        foreach (KeyValuePair<string, object> sss in val)
                        {
                            if (!dt.Columns.Contains(sss.Key))
                            {
                                dt.Columns.Add(sss.Key.ToString());
                                dr[sss.Key] = sss.Value;
                            }
                            else
                                dr[sss.Key] = sss.Value;
                        }
                        dt.Rows.Add(dr);
                    }
                    ds.Tables.Add(dt);
                }
                return ds;
            }
            catch
            {
                return null;
            }
        }




        /// <summary>
        /// 临时方法 把字典表生成js文件 职位
        /// </summary>
        public static string funTemp(string total)
        {
            DataSet ds = hrSystem.DAL.commd.dalcomd.P_Sys_getTableCoum("zh_Sys_Position", "dictNO,parentNO, Explainss ", "intType", total);
            DataTable dt = ds.Tables[0];
            DataTable CurrDt = dt;
            StringBuilder sbuBuilder = new StringBuilder();
            sbuBuilder.Append("{\"Item\":[");
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                if (dt.Rows[i]["parentNO"] == DBNull.Value)
                {

                    DataRow[] drTemp1 = dt.Select(" parentNO='" + dt.Rows[i]["dictNO"].ToString() + "'");

                    sbuBuilder.Append("[");
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        sbuBuilder.Append("\"");
                        sbuBuilder.Append(dt.Rows[i][j].ToString().Replace("\"", "\\\"").Replace("\r\n", "<br>"));
                        sbuBuilder.Append("\",");
                    }
                    if (dt.Rows[i]["parentNO"] == DBNull.Value)
                    {

                        DataTable dtTemp2 = new DataTable();
                        for (int j = 0; j < dt.Columns.Count; j++)
                        {
                            dtTemp2.Columns.Add("");
                        }
                        foreach (DataRow drTemp in dt.Select(" parentNO='" + dt.Rows[i]["dictNO"].ToString() + "'"))
                        {
                            string[] dtAppend = new string[drTemp.ItemArray.Length];
                            for (int k = 0; k < drTemp.ItemArray.Length; k++)
                            {
                                dtAppend[k] = drTemp.ItemArray[k].ToString();
                            }
                            dtTemp2.Rows.Add(dtAppend);
                        }

                        sbuBuilder.Append(ToJson(dtTemp2) + "}");
                        dtTemp2.Clear();
                    }

                    sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
                    sbuBuilder.Append("],,");

                    if (dt.Rows.Count > 0)
                    {
                        sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
                    }


                }

            }
            sbuBuilder.Append("]},");
            sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
            return sbuBuilder.ToString();
        }


        /// <summary>
        /// 临时方法 把字典表生成js文件 城市
        /// </summary>
        public static string funTemp1()
        {
            DataSet ds = hrSystem.DAL.commd.dalcomd.P_Sys_getTableCoum("zh_Sys_crty", "intCrtyCode,intParentCrtyCode, strName,intType,strSpell ", "1", "1");
            DataTable dt = ds.Tables[0];
            DataTable CurrDt = dt;
            StringBuilder sbuBuilder = new StringBuilder();
            sbuBuilder.Append("{\"Item\":[");
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                if (dt.Rows[i]["intParentCrtyCode"].ToString() == "-1")
                {

                    DataRow[] drTemp1 = dt.Select(" intParentCrtyCode='" + dt.Rows[i]["intCrtyCode"].ToString() + "'");

                    sbuBuilder.Append("[");
                    for (int j = 0; j < dt.Columns.Count; j++)
                    {
                        sbuBuilder.Append("\"");
                        sbuBuilder.Append(dt.Rows[i][j].ToString().Replace("\"", "\\\"").Replace("\r\n", "<br>"));
                        sbuBuilder.Append("\",");
                    }
                    if (dt.Rows[i]["intParentCrtyCode"].ToString() == "-1")
                    {

                        DataTable dtTemp2 = new DataTable();
                        for (int j = 0; j < dt.Columns.Count; j++)
                        {
                            dtTemp2.Columns.Add("");
                        }
                        foreach (DataRow drTemp in dt.Select(" intParentCrtyCode='" + dt.Rows[i]["intCrtyCode"].ToString() + "'"))
                        {
                            string[] dtAppend = new string[drTemp.ItemArray.Length];
                            for (int k = 0; k < drTemp.ItemArray.Length; k++)
                            {
                                dtAppend[k] = drTemp.ItemArray[k].ToString();
                            }
                            dtTemp2.Rows.Add(dtAppend);
                        }

                        sbuBuilder.Append(ToJson(dtTemp2) + "}");
                        dtTemp2.Clear();
                    }

                    sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
                    sbuBuilder.Append("],,");

                    if (dt.Rows.Count > 0)
                    {
                        sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
                    }


                }

            }
            sbuBuilder.Append("]},");
            sbuBuilder.Remove(sbuBuilder.Length - 1, 1);
            return sbuBuilder.ToString();
        }
    }

 ------------------------------------------------------第二种方式 自带的

 string json = JsonConvert.SerializeObject(ds.Tables[0]);
 List<MuzuAPI.Model.shopgoodsstock> list = JsonConvert.DeserializeObject<List<MuzuAPI.Model.shopgoodsstock>>(json);

 ------------------------------------------------------

/// <summary>
    /// DataTable转实体集合
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public static class FillModel<T> where T : new()
    {
        /// <summary>  
        /// 填充对象列表：用DataTable填充实体类
        /// </summary>  
        public static List<T> TableToModel(DataTable dt)
        {
            if (dt == null || dt.Rows.Count == 0)
            {
                return null;
            }
            List<T> modelList = new List<T>();
            foreach (DataRow dr in dt.Rows)
            {
                T model = new T();
                for (int i = 0; i < dr.Table.Columns.Count; i++)
                {
                    PropertyInfo propertyInfo = model.GetType().GetProperty(dr.Table.Columns[i].ColumnName);
                    if (propertyInfo != null && dr[i] != DBNull.Value)
                        propertyInfo.SetValue(model, dr[i], null);
                }

                modelList.Add(model);
            }
            return modelList;
        }