Fuel_ASo/Fuel_ASO/DbUtil.cs

using Fuel01.Models;
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 DataSet1.tb_prestaDataTable LoadPrestaFromJson(string filename,List<Produit> lprod)
        {
            if (!File.Exists(filename))
            {
                return default;
            }

            var datas = File.ReadAllText(filename);

            var tmData = JsonConvert.DeserializeObject<List<PrestaSta>>(datas);
            var prestas = new List<Presta>();
            foreach (var data in tmData) 
            {
                if (data.autres != null)
                {
                    foreach (var autre in data.autres)
                    {
                        var prod= lprod.FirstOrDefault(x=>x.lib_prod.Equals(autre.lib_prod))?.key_prod;
                        if (prod != null)
                        {
                            var presta = new Presta();
                            presta.sta_pr = data.sta_pr;
                            presta.prod_pr = prod;
                            presta.kind_pr = "Service";
                            presta.unite_pr = autre.unite_pr;
                            presta.pu_pr = double.Parse(autre.pu_pr);
                            presta.tva_pr = double.Parse(autre.tva_pr);
                            presta.ttc_pr = double.Parse(autre.ttc_pr);
                            prestas.Add(presta);
                        }
                    }
                }
                if (data.carburants != null)
                {
                    foreach (var autre in data.carburants)
                    {
                        var prod = lprod.FirstOrDefault(x => x.lib_prod.Equals(autre.lib_prod))?.key_prod;
                        if (prod != null)
                        {
                            var presta = new Presta();
                            presta.sta_pr = data.sta_pr;
                            presta.prod_pr = prod;
                            presta.kind_pr = "Carburant";
                            presta.unite_pr = autre.unite_pr;
                            presta.pu_pr = double.Parse(autre.pu_pr);
                            presta.tva_pr = double.Parse(autre.tva_pr);
                            presta.ttc_pr = double.Parse(autre.ttc_pr);
                            prestas.Add(presta);
                        }
                    }
                }
            }
            var json = JsonConvert.SerializeObject(prestas, Formatting.Indented);

            var returnData = JsonConvert.DeserializeObject<DataSet1.tb_prestaDataTable>(json);

            return returnData;

        }


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

            var datas = File.ReadAllText(filename);

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

            return tmData;

        }

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


        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;
            }
        }

        

    }
}