Programm_Wirl/AA-Klassen/Fach.cs

using Npgsql;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DatenDB
{
	
  public enum Liefertag
  {
		SO = 0,
    MO = 1,
    DI = 2,
    MI = 3,
    DO = 4,
    FR = 5,
		SA = 6,
		STV = 7
  }
  public class Fach
	{
		private const string COLUMNS = "fach_id, maschine_id, kunde_id, wprogramm_id, gewicht, extra, gewaschen, extrakunde_id, liefertag, auftrag_id, extraauftrag_id, tischsummary, containersummary";
		private const string TABLE = "kundenverwaltung.fach";

		public static List<Fach> GetVerlauf(int? mID)
		{
			DatenbankConnection.GetConnection().Open();
			List<Fach> resultlist = new List<Fach>();
			NpgsqlCommand command = new NpgsqlCommand();
			command.Connection = DatenbankConnection.GetConnection();

			command.CommandText = $"select {COLUMNS} from {TABLE} where maschine_id = {mID}";

			NpgsqlDataReader reader = command.ExecuteReader();
			while (reader.Read()) resultlist.Add(new Fach(reader));
			reader.Close();
			DatenbankConnection.GetConnection().Close();
			return resultlist;
		}

    public static List<int> GetTischSummary(int? mID)
    {
      DatenbankConnection.GetConnection().Open();
      List<int> resultlist = new List<int>();
      NpgsqlCommand command = new NpgsqlCommand();
      command.Connection = DatenbankConnection.GetConnection();

      command.CommandText = $"select distinct(auftrag_id) from {TABLE} where maschine_id = {mID} and fach_id > (select max(fach_id) from {TABLE} where tischsummary = true) order by auftrag_id asc";

      NpgsqlDataReader reader = command.ExecuteReader();
      while (reader.Read()) resultlist.Add(reader.GetInt32(0));
      reader.Close();
      DatenbankConnection.GetConnection().Close();
      return resultlist;
    }

    public static List<Fach> GetInhalt(int? mID, int fachzahl)
		{
			DatenbankConnection.GetConnection().Open();
			List<Fach> resultlist = new List<Fach>();
			NpgsqlCommand command = new NpgsqlCommand();
			command.Connection = DatenbankConnection.GetConnection();

			command.CommandText = $"select {COLUMNS} from {TABLE} where maschine_id = {mID} order by gewaschen desc Limit {fachzahl}";

			NpgsqlDataReader reader = command.ExecuteReader();
			while (reader.Read()) resultlist.Add(new Fach(reader));
			reader.Close();
			DatenbankConnection.GetConnection().Close();
			return resultlist;
		}
		public static Fach GetFach(int? ms, int fach)
		{
			DatenbankConnection.GetConnection().Open();
			Fach result = new Fach();
			using (NpgsqlCommand command = new NpgsqlCommand())
			{
				command.Connection = DatenbankConnection.GetConnection();
				if (ms == 1) command.CommandText = $"select fach_id, maschine_id, kunde_id, wprogramm_id, gewicht, extra, gewaschen, extrakunde_id, liefertag, auftrag_id, extraauftrag_id from kundenverwaltung.inhalt_ws1 where row_number = {fach}";
				if (ms == 2) command.CommandText = $"select fach_id, maschine_id, kunde_id, wprogramm_id, gewicht, extra, gewaschen, extrakunde_id, liefertag, auftrag_id, extraauftrag_id from kundenverwaltung.inhalt_ws2 where row_number = {fach}";
        NpgsqlDataReader reader = command.ExecuteReader();
				while (reader.Read()) result = new Fach(reader);
				reader.Close();
			}
			DatenbankConnection.GetConnection().Close();

			return result;
		}
		public int? FachID { get; set; }
		public int MaschineID { get; set; }
		public int KundeID { get; set; }
		public int WProgrammID { get; set; }
		public double? Gewicht { get; set; }
		public DateTime Gewaschen { get; set; }
		public int? Extra { get; set; }
		public Liefertag Liefertag { get; set; } = Liefertag.MO;
		public int? ExtraKundeID { get; set; }
		public DateTime? Lieferdatum { get; set; }
		public int? AuftragID { get; set; }
		public int? ExtraAuftragID { get; set; }
		public bool TischSummary { get; set; }
		public bool ContainerSummary { get; set; }


		public Fach(NpgsqlDataReader reader)
		{
			this.FachID = reader.GetInt32(0);
			this.MaschineID = reader.GetInt32(1);
			this.KundeID = reader.GetInt32(2);
			this.WProgrammID = reader.GetInt32(3);
			this.Gewicht = reader.IsDBNull(4) ? null : (double?)reader.GetDouble(4);
			this.Extra = reader.IsDBNull(5) ? null : (int?)reader.GetInt16(5);
			this.Gewaschen = reader.GetDateTime(6);
			this.ExtraKundeID = reader.IsDBNull(7) ? (int?)null : reader.GetInt32(7);
			this.Lieferdatum = reader.IsDBNull(8) ? (DateTime?)null : reader.GetDateTime(8);
			this.AuftragID = reader.IsDBNull(9) ? (int?)null : reader.GetInt32(9);
			this.ExtraAuftragID = reader.IsDBNull(10) ? (int?)null : reader.GetInt32(10);
			if(reader.FieldCount > 11)
			{
        this.TischSummary = reader.IsDBNull(11) ? false : reader.GetBoolean(11);
        this.ContainerSummary = reader.IsDBNull(12) ? false : reader.GetBoolean(12);
      }
    }
		public int Save()
		{
			DatenbankConnection.GetConnection().Open();
			NpgsqlCommand command = new NpgsqlCommand();
			command.Connection = DatenbankConnection.GetConnection();

			if (this.FachID.HasValue & this.FachID != 0)
			{
				command.CommandText = $"update {TABLE} set maschine_id = :p1, kunde_id = :p2, wprogramm_id = :p3, gewicht = :p4, extra = :p5, gewaschen = :p6, extrakunde_id = :p7, liefertag = :p8, auftrag_id = :p9, extraauftrag_id = :p10, tischsummary = :p11, containersummary = :p12 where fach_id = :p0";
			}
			else
			{
				command.CommandText = "select nextval('kundenverwaltung.fach_seq')";
				this.FachID = (int)(long)command.ExecuteScalar();
				command.CommandText = $"insert into {TABLE} ({COLUMNS}) values (:p0, :p1, :p2, :p3, :p4, :p5, :p6, :p7, :p8, :p9, :p10, :p11, :p12)";
			}
			command.Parameters.AddWithValue("p0", this.FachID);
			command.Parameters.AddWithValue("p1", this.MaschineID);
			command.Parameters.AddWithValue("p2", this.KundeID);
			command.Parameters.AddWithValue("p3", this.WProgrammID);
			command.Parameters.AddWithValue("p4", this.Gewicht.HasValue ? this.Gewicht.Value : (object)DBNull.Value);
			command.Parameters.AddWithValue("p5", this.Extra.HasValue ? this.Extra.Value : (object)DBNull.Value);
			command.Parameters.AddWithValue("p6", this.Gewaschen);
			command.Parameters.AddWithValue("p7", this.ExtraKundeID.HasValue ? this.ExtraKundeID : (object)DBNull.Value);
			command.Parameters.AddWithValue("p8", this.Lieferdatum.HasValue ? this.Lieferdatum : (object)DBNull.Value);
			command.Parameters.AddWithValue("p9", this.AuftragID.HasValue ? this.AuftragID.Value : (object)DBNull.Value);
			command.Parameters.AddWithValue("p10", this.ExtraAuftragID.HasValue ? this.ExtraAuftragID.Value : (object)DBNull.Value);
			command.Parameters.AddWithValue("p11", this.TischSummary);
			command.Parameters.AddWithValue("p12", this.ContainerSummary);

			int result = command.ExecuteNonQuery();
			DatenbankConnection.GetConnection().Close();
			return result;
		}

		public Fach()
		{
		}

	}
}