Fuel_ASo/Fuel_ASO/DbUtil.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Fuel01
{
    public static class DbUtil
    {
        public static T LoadFromJson<T>(string filename, DataSet ds) where T : class
        {
            if (!File.Exists(filename))
            {
                return null;
            }
            ds.Clear();

            var datas = File.ReadAllText(filename);

            var tmData = JsonConvert.DeserializeObject<DataSet1.tb_epreuveDataTable>(datas);

            return tmData as T;

        }

        public static T LoadFromJson<T> (string filename, T ds) 
        {
            if (!File.Exists(filename))
            {
                return default(T);
            }

            var datas = File.ReadAllText(filename);

            var tmData = JsonConvert.DeserializeObject<T>(datas);

            return tmData;

        }

        public static bool SaveToJson<T>(string filename, T ds)
        {
            try
            {
                var result = JsonConvert.SerializeObject(ds, Formatting.Indented);
                File.WriteAllText(filename, result);
                return true;
            }
            catch
            {
                return false;
            }
        }

        

    }
}