78 lines
2.7 KiB
C#
78 lines
2.7 KiB
C#
using BeautySalonDBModels.Models;
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using Npgsql;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace BeautySalonDBModels.Implements
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{
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public class SpecialisationDB : AbstractWorkWithStorage<Specialisation>
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{
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public override void Add(Specialisation specialisation)
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{
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using var conn = GetConnection();
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conn.Open();
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using var cmd = new NpgsqlCommand("INSERT INTO specialisations (specialisation_name) " +
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"VALUES (@Name)", conn);
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cmd.Parameters.AddWithValue("@Name", specialisation.Name);
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cmd.ExecuteNonQuery();
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}
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public override Specialisation? GetObject(int id)
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{
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using var conn = GetConnection();
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conn.Open();
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using var cmd = new NpgsqlCommand("SELECT * FROM specialisations WHERE specialisation_id = {id}", conn);
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using var reader = cmd.ExecuteReader();
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if (reader.Read())
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{
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return new Specialisation
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{
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SpecialisationId = reader.GetInt32(0),
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Name = reader.GetString(1)
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};
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}
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return null;
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}
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public override List<Specialisation> GetObjects()
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{
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var specialisations = new List<Specialisation>();
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using var conn = GetConnection();
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conn.Open();
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using var cmd = new NpgsqlCommand("SELECT * FROM specialisations order by specialisation_id", conn);
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using var reader = cmd.ExecuteReader();
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while (reader.Read())
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{
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specialisations.Add(new Specialisation
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{
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SpecialisationId = reader.GetInt32(0),
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Name = reader.GetString(1)
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});
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}
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return specialisations;
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}
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public override Specialisation? Remove(int id)
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{
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var specialisation = GetObject(id);
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using var conn = GetConnection();
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conn.Open();
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using var cmd = new NpgsqlCommand("delete from specialisations where specialisation_id = {id}", conn);
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cmd.ExecuteNonQuery();
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return specialisation;
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}
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public override void Update(Specialisation specialisation)
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{
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using var conn = GetConnection();
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conn.Open();
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using var cmd = new NpgsqlCommand("update specialisation set specialisation_name = {specialisation.Name}, " +
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"where specialisation_id = {specialisation.SpecialisationId}", conn);
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cmd.ExecuteNonQuery();
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}
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}
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}
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