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Ejemplo muy simple de uso de paquete NuGet "Dapper" para mapear automáticamente resultado de una consulta en un objeto en C# VS2019.
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using Dapper; | |
using MySql.Data.MySqlClient; | |
using System; | |
using System.Collections.Generic; | |
using System.Configuration; | |
using System.Data; | |
using System.Linq; | |
using System.Security.Permissions; | |
using System.Text; | |
using System.Threading.Tasks; | |
namespace EjemploDapper | |
{ | |
/// <summary> | |
/// Ejemplo básico para mapeo en usando Dapper. | |
/// </summary> | |
/// <remarks> | |
/// Llamar get_user_data usando los métodos entre try...catch por si hay errorers de conexión mostrar el mensaje. | |
/// O implementar algún Error_handler como el de EiffelStudio. | |
/// Es una buena práctica separar en una carpeta los objetos y en otra los comandos que los cargan. | |
/// </remarks> | |
/// <seealso cref="https://www.infoworld.com/article/3025784/how-to-use-the-dapper-orm-in-c.html"/> | |
public class EjemploDapper | |
{ | |
public List<User> get_user_data(string a_username, string a_password) | |
{ | |
using (IDbConnection db = new MySqlConnection(Properties.Settings.Default.connection_string)) | |
{ | |
return (List<User>)db.Query<User> | |
($"select person_id, username, status from users where username='{a_username}' and password=sha('{a_password}');"); | |
} | |
} | |
} | |
} |
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using System.Threading.Tasks; | |
namespace EjemploDapper | |
{ | |
/// <summary> | |
/// Clase para mapear una consulta con Dapper | |
/// Se creará una lista de objetos de esta clase. | |
/// </summary> | |
public class User | |
{ | |
public int person_id { get; set; } | |
public string username { get; set; } | |
public string status { get; set; } | |
} | |
} |
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