wpf中 efcore 两种配置方式

1.外部传入

public partial class App : Application
    {
        ServiceProvider serviceProvider { get; set; }

        protected override void OnStartup(StartupEventArgs e)
        {
            var service=new ServiceCollection();

            ConfigurationService(service);

            serviceProvider = service.BuildServiceProvider();

            var mainView = serviceProvider.GetRequiredService<MainWindow>();
            mainView.Show();

            base.OnStartup(e);
        }

        private void ConfigurationService(ServiceCollection service)
        {
            service.AddTransient(typeof(MainWindow));
            //service.AddDbContext<SchemeContext>();

            IConfiguration configuration;
            var builder = new ConfigurationBuilder();

            builder.AddJsonFile(System.Environment.CurrentDirectory+"\\AppSetting.json", false, true);
            configuration = builder.Build();

            var value=configuration.GetSection("Oracle");
            if(value == null)
            {
                MessageBox.Show("请配置数据库连接");
                Application.Current.Shutdown();
            }


            service.AddDbContext<SchemeContext>(option => { option.UseOracle(value.Value, f => f.UseOracleSQLCompatibility("12")); });
        }
    }

2. 在数据库上下文中OnConfiguring方法中构造

public class SchemeContext : DbContext
    {

        public SchemeContext(DbContextOptions options) : base(options)
        {

        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseOracle("Data Source=(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.2.48)(PORT = 1521)))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = CASICTEST)));User ID=mes;Password=mesadmin;", f => f.UseOracleSQLCompatibility("12"));
        }
}