BWPM/BlazorApp/Controller/Teacher/LehrerController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using BWPMModels;
using BlazorApp.Helper;
using Newtonsoft.Json;
using System.Data;
using Microsoft.AspNetCore.Mvc;

namespace BlazorApp.Controller

{

    public class LehrerController : ControllerBase
    {
        public static List<Lehrer> GetAllData()
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabledata("Select * from Lehrer", false, true);
            return dbh.ConvertDataTable<Lehrer>(dbh.dsdaten.Tables[0]);
        }

        public static List<Lehrer> GetByID(int ID)
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabledata("Select * from Lehrer where id=" + ID.ToString(), false, true);
            return dbh.ConvertDataTable<Lehrer>(dbh.dsdaten.Tables[0]);
        }

        public static List<Lehrer> GetByUserID(string UserID)
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabledata("Select * from Lehrer where userid='" + UserID + "'", false, true);
            if (dbh.dsdaten.Tables[0].Rows.Count == 0)
            {
                Lehrer Lehrerdata = new Lehrer();


                Lehrerdata.aktiv = true;
                Lehrerdata.erstellt_am = DateTime.Now;
                Lehrerdata.mutierer = UserID;
                Lehrerdata.mutiert_am = DateTime.Now;
                Lehrerdata.userid = UserID;

                POST(Lehrerdata);
                dbh.Get_Tabledata("Select * from Lehrer where userid='" + UserID + "'", false, true);
            }
            return dbh.ConvertDataTable<Lehrer>(dbh.dsdaten.Tables[0]);

        }
        public static List<Lehrer> GetLast()
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabledata("Select top 1 * from Lehrer order by mutiert_am desc", false, true);
            return dbh.ConvertDataTable<Lehrer>(dbh.dsdaten.Tables[0]);
        }
        public static List<Lehrer> GetLastByMutierer(string Mutierer)
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabledata("Select top 1 * from Lehrer where mutierer='" + Mutierer + "' order by mutiert_am desc", false, true);
            return dbh.ConvertDataTable<Lehrer>(dbh.dsdaten.Tables[0]);
        }

        public static List<Lehrer> GetbyUserSQL(string SQL)
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabledata(SQL, false, true);
            return dbh.ConvertDataTable<Lehrer>(dbh.dsdaten.Tables[0]);
        }

        public static int POST(Lehrer Lehrerdata)
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabeldata_for_Update("Select top 1 * from [Lehrer] where id=-1", false, true);
            DataRow dr = dbh.dsdaten.Tables[0].NewRow();
            Lehrerdata.GetType().GetProperties().ToList().ForEach(f =>
            {
                try
                {
                    if (f.PropertyType == typeof(DateTime))
                    {
                        dr[f.Name] = (DateTime)f.GetValue(Lehrerdata, null);

                    }
                    else
                    {
                        dr[f.Name] = f.GetValue(Lehrerdata, null);
                    }
                }
                catch (Exception ex) { string s = ex.Message; }
            });
            dbh.dsdaten.Tables[0].Rows.Add(dr);
            dbh.Update_Tabeldata();
            List<Lehrer> tmplst = GetLastByMutierer(Lehrerdata.mutierer);
            return tmplst.First<Lehrer>().ID;
        }

        public static void PUT(Lehrer Lehrerdata)
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabeldata_for_Update("Select top 1 * from [Lehrer] where id=" + Lehrerdata.ID.ToString(), false, true);
            DataRow dr = dbh.dsdaten.Tables[0].Rows[0];
            Lehrerdata.GetType().GetProperties().ToList().ForEach(f =>
            {
                try
                {
                    if (f.PropertyType == typeof(DateTime))
                    {
                        dr[f.Name] = (DateTime)f.GetValue(Lehrerdata, null);
                    }
                    else
                    {
                        dr[f.Name] = f.GetValue(Lehrerdata, null);
                    }
                }
                catch (Exception ex) { string s = ex.Message; }
            });
            dbh.Update_Tabeldata();

        }

        public static void DELETE(Lehrer Lehrerdata)
        {
            dbhelper dbh = new dbhelper();
            dbh.Get_Tabeldata_for_Update("delete from [Lehrer] where id=" + Lehrerdata.ID.ToString(), false, true);
        }
    }



}