FreeSql/Examples/dbcontext_01/Program.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Threading.Tasks;
using FreeSql;
using FreeSql.DataAnnotations;
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

namespace dbcontext_01
{
    public class Program
    {

		public class Song {
			[Column(IsIdentity = true)]
			public int Id { get; set; }
			public string BigNumber { get; set; }

			[Column(IsVersion = true)]//使用简单
			public long versionRow { get; set; }
		}

		public class SongContext : DbContext {

			public DbSet<Song> Songs { get; set; }

			protected override void OnConfiguring(DbContextOptionsBuilder builder) {
				builder.UseFreeSql(fsql);
			}
		}
		static IFreeSql fsql;
		public static void Main(string[] args) {
			fsql = new FreeSql.FreeSqlBuilder()
				.UseConnectionString(FreeSql.DataType.Sqlite, @"Data Source=|DataDirectory|\dd2.db;Pooling=true;Max Pool Size=10")
				.UseAutoSyncStructure(true)
				.UseLazyLoading(true)
				.UseNoneCommandParameter(true)

				.UseMonitorCommand(cmd => Trace.WriteLine(cmd.CommandText))
				.Build();

			using (var ctx = new SongContext()) {
				var song = new Song { BigNumber = "1000000000000000000" };
				ctx.Songs.Add(song);

				ctx.Songs.Update(song);

				song.BigNumber = (BigInteger.Parse(song.BigNumber) + 1).ToString();
				ctx.Songs.Update(song);

				ctx.SaveChanges();
			}

			CreateWebHostBuilder(args).Build().Run();
		}

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>();
    }
}