BPASmartClient/BPASmartClient.Helper/Sqlite.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Sqlite;

namespace BPASmartClient.Helper
{
    public class Sqlite<T> : DbContext where T : class, new()
    {

        private volatile static Sqlite<T> _Instance;
        public static Sqlite<T> GetInstance => _Instance ?? (_Instance = new Sqlite<T>());
        private Sqlite() { }

        public DbSet<T> Base { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlite($"FileName={path}");
        }

        static string path
        {
            get
            {
                Directory.CreateDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"AccessFile\\DB"));
                return $"{AppDomain.CurrentDomain.BaseDirectory}AccessFile\\DB\\{typeof(T).Name}.db";
            }
        }
        public bool DataBaseExist()
        {
            return Database.EnsureCreated();
        }

        public void Save()
        {
            Database.EnsureCreated();
            var a = SaveChanges();
        }

        public List<T> GetData()
        {
            Database.EnsureCreated();
            return Base.ToList();
        }

    }
}