在ABP框架中，ORM（对象关系映射）是一种常用的数据访问方式。但是如果你想在ABP中不使用ORM，可以使用Dapper、ADO.NET或者原生SQL语句来实现数据访问。

以下是一个使用Dapper实现数据访问的示例：

1. 首先，创建一个接口来定义数据访问的方法：

public interface IMyRepository
{
    Task> GetAllAsync();
    Task GetAsync(int id);
    Task CreateAsync(MyEntity entity);
    Task UpdateAsync(MyEntity entity);
    Task DeleteAsync(int id);
}

2. 创建一个实现该接口的类，使用Dapper来实现数据访问逻辑：

public class MyRepository : IMyRepository
{
    private readonly IDbConnection _dbConnection;
    
    public MyRepository(IDbConnection dbConnection)
    {
        _dbConnection = dbConnection;
    }
    
    public async Task> GetAllAsync()
    {
        var sql = "SELECT * FROM MyEntities";
        return (await _dbConnection.QueryAsync(sql)).ToList();
    }
    
    public async Task GetAsync(int id)
    {
        var sql = "SELECT * FROM MyEntities WHERE Id = @Id";
        return await _dbConnection.QueryFirstOrDefaultAsync(sql, new { Id = id });
    }
    
    public async Task CreateAsync(MyEntity entity)
    {
        var sql = "INSERT INTO MyEntities (Name) VALUES (@Name)";
        await _dbConnection.ExecuteAsync(sql, entity);
    }
    
    public async Task UpdateAsync(MyEntity entity)
    {
        var sql = "UPDATE MyEntities SET Name = @Name WHERE Id = @Id";
        await _dbConnection.ExecuteAsync(sql, entity);
    }
    
    public async Task DeleteAsync(int id)
    {
        var sql = "DELETE FROM MyEntities WHERE Id = @Id";
        await _dbConnection.ExecuteAsync(sql, new { Id = id });
    }
}

3. 注册该Repository类到ABP的依赖注入系统中：

public override void ConfigureServices(ServiceConfigurationContext context)
{
    // ...
    Configure(options =>
    {
        options.ConnectionStrings.Default = "YourDbConnectionString";
    });
    // ...
    
    context.Services.AddTransient();
}

现在，你可以在应用程序的其他地方通过依赖注入来使用刚刚创建的IMyRepository接口，而无需使用ORM。例如：

public class MyApplicationService : ApplicationService
{
    private readonly IMyRepository _myRepository;
    
    public MyApplicationService(IMyRepository myRepository)
    {
        _myRepository = myRepository;
    }
    
    public async Task> GetAllAsync()
    {
        var entities = await _myRepository.GetAllAsync();
        return ObjectMapper.Map, List>(entities);
    }
    
    // other methods...
}