82 lines
2.6 KiB
C#
82 lines
2.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Data;
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using System.Data.SqlClient;
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using bsmd.AISService.AIS;
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namespace bsmd.AISService.DB
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{
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internal class Hotposition : AISBaseEntity
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{
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private int mmsi;
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private Guid pid;
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public int MMSI
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{
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get { return this.mmsi; }
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}
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public Guid PosReportId
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{
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get { return this.pid; }
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set { this.pid = value; }
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}
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public void Save(DBConnector con)
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{
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string query = string.Format("UPDATE hotposition SET mmsi={0}, pid='{1}' WHERE id='{2}'",
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this.mmsi, this.pid, this.id);
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con.ExecuteNonQuery(query);
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}
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public static Hotposition LoadForMMSI(int mmsi, DBConnector con)
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{
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List<Hotposition> results = new List<Hotposition>();
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string query = string.Format("SELECT id, pid FROM hotposition WHERE mmsi={0}", mmsi);
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SqlDataReader reader = con.ExecuteQuery(query);
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if (reader != null)
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{
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while (reader.Read())
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{
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Hotposition hp = new Hotposition();
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hp.id = reader.GetGuid(0);
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hp.mmsi = mmsi;
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if (!reader.IsDBNull(1))
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hp.pid = reader.GetGuid(1);
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results.Add(hp);
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}
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reader.Close();
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}
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if (results.Count == 0)
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{
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// neuen Eintrag erzeugen
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Hotposition hp = new Hotposition();
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hp.Id = Guid.NewGuid();
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hp.mmsi = mmsi;
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hp.IsNew = false;
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string insertQuery = string.Format("INSERT INTO hotposition (id, mmsi) VALUES ('{0}', {1})", hp.Id, mmsi);
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con.ExecuteNonQuery(insertQuery);
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return hp;
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}
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else if (results.Count == 1)
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{
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return results[0];
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}
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else
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{
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// überschüssige HP's löschen (jeweils nur eins pro MMSI)
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for (int i = 1; i < results.Count; i++)
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{
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string delQuery = string.Format("DELETE FROM hotposition WHERE id={0}", results[i].id);
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con.ExecuteNonQuery(delQuery);
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}
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return results[0];
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}
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}
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}
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}
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