像 DataAdapter 这样的 Dapper 命令

Question

拜托，我可以将此方法转换为使用 Dapper 吗？

• “BuscarUltimasLeituras”是一个程序
• “@Last”是过程的参数（int）

---

public DataTable GetLeituras ( int ultimas )
    {
        DataTable listaLeiturasRomaneio = new DataTable();
        try
        {
            _sqlConnection.Open();

            _sqlCommand = new SqlCommand();
            _sqlCommand.Connection = _sqlConnection;
            _sqlCommand.CommandText = "BuscarUltimasLeituras";
            _sqlCommand.CommandType = System.Data.CommandType.StoredProcedure;
            _sqlCommand.Parameters.Add("@Last", SqlDbType.Int).Value = ultimas;
            _sqlAdapter = new SqlDataAdapter(_sqlCommand);
            _sqlAdapter.Fill(listaLeiturasRomaneio);
        }
        catch ( SqlException )
        {
            listaLeiturasRomaneio = null;
        }
        finally
        {
            _sqlConnection.Close();
        }
        return listaLeiturasRomaneio;
    }

Answer 1

如果你仍然想要一个DataTable，你可以尝试：

var listaLeiturasRomaneio = new DataTable();
using (var reader = _sqlConnection.ExecuteReader(
    "BuscarUltimasLeituras", new { Last = ultimas },
    commandType: CommandType.StoredProcedure))
{
    listaLeiturasRomaneio.Load(reader);
}

但是，更典型的用法是创建一个class以匹配您的数据，然后：

var listaLeiturasRomaneio = _sqlConnection.Query<YourType>(
    "BuscarUltimasLeituras", new { Last = ultimas },
    commandType: CommandType.StoredProcedure).AsList();

请注意，dapper 也支持dynamic使用，但这通常用于临时使用：

var listaLeiturasRomaneio = _sqlConnection.Query(
    "BuscarUltimasLeituras", new { Last = ultimas },
    commandType: CommandType.StoredProcedure).AsList();