EFCore7Study/EFCore7Study.DataService/AppDbContext.cs

using EFCore7Study.DataService.Models;

using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;

using EntityFrameworkCore.UseRowNumberForPaging;

namespace EFCore7Study.DataService
{
    /// <summary>
    /// 多构造函数
    /// 为使用工厂方式注册，加 ActivatorUtilitiesConstructor 特性
    /// </summary>
    public class AppDbContext : DbContext
    {
        /// <summary>
        /// 连接字符串，可实现属性设置，避免多构造函数在Factory时，IoC异常
        /// </summary>
        public string? ConnectString = @"Server=127.0.0.1\SQL2019;Database=EFCore7Study;User Id=sa;Password=gly-bicijinlian;Encrypt=True;TrustServerCertificate=True;";

        public AppDbContext()
        {

        }

        public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
        {

        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
            {
                if (string.IsNullOrWhiteSpace(ConnectString))
                {
                    ConnectString = @"Server=127.0.0.1\SQL2019;Database=EFCore7Study;User Id=sa;Password=gly-bicijinlian;Encrypt=True;TrustServerCertificate=True;";
                }

                optionsBuilder
                    .UseSqlServer(ConnectString, opt => { opt.UseRowNumberForPaging(); })
                    .EnableSensitiveDataLogging();
            }
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Account>().ToTable("Account");

            base.OnModelCreating(modelBuilder);
        }

        public DbSet<Account> Accounts { get; set; }
    }
}