AvaloniaProject/AvaloniaApplication4/ViewModels/StudentsViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using Avalonia.Controls;
using AvaloniaApplication4.AdditionalModels;
using AvaloniaApplication4.Models;
using AvaloniaApplication4.Views.ActionPages;
using Microsoft.EntityFrameworkCore;
using ReactiveUI;

namespace AvaloniaApplication4.ViewModels
{
	public class StudentsViewModel : ViewModelBase
	{
		User? user;
        List<StudentsTemplate> all = new List<StudentsTemplate>();
        List<StudentsTemplate> staticAll = new List<StudentsTemplate>();
        string searchQueryPrograms = string.Empty;

        public string SearchQueryPrograms
        {
            get
            {
                return searchQueryPrograms;
            }
            set
            {
                searchQueryPrograms = value;
                if (searchQueryPrograms != null && searchQueryPrograms != string.Empty && searchQueryPrograms != "")
                {
                    All = staticAll.Where(x=>x.Program.IdProgramTemplateNavigation.NameProgram.ToLower().StartsWith(searchQueryPrograms.ToLower())).ToList();
                }
                else All = staticAll;
            }
        }

        GlobalsData globalsData;
        public StudentsViewModel(User? user, ref GlobalsData globalsData)
        {
            this.user = user;
            List<RunningProgram> programs = dataBase.RunningPrograms
                .Include(x=>x.IdProgramTemplateNavigation)
                .ToList();
            List<ProgramsWithStudent> programsWithStudents = dataBase.ProgramsWithStudents
                .Include(x=>x.IdRunningProgramNavigation)
                .Include(x=>x.IdStudentNavigation)
                .ToList();
            foreach (var program in programs)
            {
                All.Add
                    (
                    new StudentsTemplate(program, programsWithStudents.Where(x=>x.IdRunningProgram == program.IdRunningPrograms).ToList())
                    );
            }
            staticAll = All;

            this.globalsData = globalsData;
        }
        public void EditStudent(int id)
        {
            Student? student = dataBase.Students.Include(x=>x.IdEducationNavigation).FirstOrDefault(x=>x.IdStudent == id);
            if (student != null)
            {
                globalsData.GlobalUserControl = new EditAndAddStudent(user, student, ref globalsData);
            }
        }
        public void AddNewStudent()
        {
            globalsData.GlobalUserControl = new EditAndAddStudent(user, ref globalsData);
        }
        internal List<StudentsTemplate> All
        {
            get { return all; }
            set
            {
                if (all == value)
                    return;

                all = value;
                OnPropertyChanged("All");
            }
        }
    }
}