PEPTool/AV-ToolV3/SQL.cs

using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PEP_Tool
{
    public static class SQL
    {
        static string connstr = "Server=10.20.97.146;Uid=PEPTool;Pwd=PEPUser;database=pep_tool";
        static MySqlConnection conn = new MySqlConnection(connstr);
        static MySqlDataAdapter adp = new MySqlDataAdapter();

        public static MySqlDataAdapter GetAdapter()
        {
            return adp;
        }

        public static MySqlConnection GetConnection()
        {
            return conn;
        }

        public static async Task<DataTable> WriteSQL(string SQLQuery, DataTable list)
        {
            var filter = list.DefaultView.RowFilter;
            using (conn)
            {
                if (conn.State == ConnectionState.Open) conn.Close();

                conn.Open();
                adp.UpdateCommand = new MySqlCommand(SQLQuery, conn);

                adp.Update(list);

                list.AcceptChanges();

                File.WriteAllText(@"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\JSON\sql.lck", "erwischt!!");
                if(SQLQuery.Contains("track"))
                    File.WriteAllText(@"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\JSON\track.lck", "erwischt!!");

                conn.Close();
            }

            list.DefaultView.RowFilter = filter;
            return list;
        }

        public static async Task WriteSQL(string SQLQuery)
        {            
            using (conn)
            {
                if (conn.State == ConnectionState.Open) conn.Close();

                conn.Open();

                MySqlCommand cmd = new MySqlCommand(SQLQuery, conn);
                cmd.ExecuteNonQuery();
                conn.Close();

                File.WriteAllText(@"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\JSON\sql.lck", "erwischt!!");
                if (SQLQuery.Contains("track"))
                    File.WriteAllText(@"\\bku.db.de\db\DB_006\GLW_11\ICE-Fertigung\M2\Personaleinsatzplanung\JSON\track.lck", "erwischt!!");
            }
        }



        public static async Task<DataTable> ReadSQL(string SQLCommand, DataTable list)
        {
            var filter = list.DefaultView.RowFilter;

            using (conn)
            {
                if (conn.State == ConnectionState.Open) conn.Close();

                conn.Open();
                adp.SelectCommand = new MySqlCommand(SQLCommand, conn);

                list.Clear();
                adp.Fill(list);
                conn.Close();
            }

            list.DefaultView.RowFilter = filter;
            return list;
        }

        public static async Task<DataTable> ReadSQL(string SQLCommand)
        {
            DataTable list = new DataTable();

            using (conn)
            {
                if (conn.State == ConnectionState.Open) conn.Close();

                conn.Open();
                adp.SelectCommand = new MySqlCommand(SQLCommand, conn);

                list.Clear();
                adp.Fill(list);
                conn.Close();
            }


            return list;
        }



        public static async Task<DataTable> ReadAllData(DataTable list)
        {
            var filter = list.DefaultView.RowFilter;

            using (conn)
            {
                if (conn.State == ConnectionState.Open) conn.Close();

                conn.Open();
                adp.SelectCommand = new MySqlCommand("select PersNr,Name,Vorname,Abteilung,o.Datum,Beginn,Gehen,Tagescode,Arbeitsmuster,Zuweisung,Bemerkung,Telefon,AnzahlLizenzen,ZugNameB from mitarbeiter_static p left join mitarbeiter_change o ON o.mitarbeiter_static_PersNr = p.PersNr ORDER BY Name", conn);
                list.Clear();
                adp.Fill(list);
                conn.Close();
            }

            list.DefaultView.RowFilter = filter;
            return list;
        }

        public static async Task<DataTable> ReadAllData(string filter = "")
        {
            try
            {
                DataTable list = new DataTable("UserList");

                using (conn)
                {
                    if (conn.State == ConnectionState.Open) conn.Close();

                    conn.Open();
                    adp.SelectCommand = new MySqlCommand("select PersNr,Name,Vorname,Abteilung,o.Datum,Beginn,Gehen,Tagescode,Arbeitsmuster,Zuweisung,Bemerkung,Telefon,AnzahlLizenzen,ZugNameB from mitarbeiter_static p left join mitarbeiter_change o ON o.mitarbeiter_static_PersNr = p.PersNr ORDER BY Name", conn);
                    list.Columns.Clear();
                    adp.Fill(list);
                    conn.Close();
                }

                list.DefaultView.RowFilter = filter;
                return list;
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex);
                return await ReadAllData();
            }
        }
    }
}