EF 通用存储库从新插入的通用实体获取 Id

使用 EF 通用存储库从新插入的通用实体获取 Id

csharp
public interface IRepository where T : class
{
    void Insert(T entity);
}
public class Repository : IRepository where T : class
{
    private readonly DbContext _context;
    private readonly DbSet _dbSet;
    public Repository(DbContext context)
    {
        _context = context;
        _dbSet = context.Set();
    }
    public void Insert(T entity)
    {
        _dbSet.Add(entity);
        _context.SaveChanges();
    }
}
public class User
{
    public int Id { get; set; }
    public string Name { get; set; }
}
public class UserRepository : Repository
{
    public UserRepository(DbContext context) : base(context)
    {
    }
}
// 使用 UserRepository 插入新的用户并获取其 Id
using (var context = new DbContext())
{
    var userRepository = new UserRepository(context);
    var user = new User
    {
        Name = "John Doe"
    };
    userRepository.Insert(user);
    var userId = user.Id;
    Console.WriteLine($"New user Id: {userId}");
}