Agents/Functions/AddProduct.axaml.cs

using Agents.Models;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Interactivity;
using Avalonia.Markup.Xaml;
using Avalonia.Media;
using System;
using System.Collections.ObjectModel;
using System.Linq;

namespace Agents;

public partial class AddProduct : Window
{
    static User11Context db = new User11Context();
    ObservableCollection<Product> ProductsitemSource = new ObservableCollection<Product>(db.Products.OrderByDescending(it=>it.Id));
    ObservableCollection<Producttype> ProducttypesitemSource = new ObservableCollection<Producttype>(db.Producttypes);
    public AddProduct()
    {
        InitializeComponent();
        ListProducts.ItemsSource = ProductsitemSource;
        ListProductType.ItemsSource = ProducttypesitemSource;
    }
    void Addproduct(object sender, RoutedEventArgs e)
    {
        try
        {
            float? i = float.Parse(TextNewCount.Text);
            int? count = Convert.ToInt32(i);


            decimal? min = Convert.ToDecimal(TextNewMincostforagent.Text);

            Producttype? t = db.Producttypes.Where(it => it == ListProductType.SelectedItem).FirstOrDefault();
            if(t != null)
            {
                if (TextNewTitle.Text != "" && TextNewArticlenumber.Text != "" && count != null && min != null)
                {
                    if (TextNewArticlenumber.Text != "")
                    {
                        if (count != null)
                        {
                            if (min != null)
                            {
                                Product product = new Product()
                                {
                                    Title = TextNewTitle.Text,
                                    Producttypeid = t.Id,
                                    Articlenumber = TextNewArticlenumber.Text,
                                    Productionpersoncount = count,
                                    Mincostforagent = (decimal)min,

                                };
                                db.Products.Add(product);
                                db.SaveChanges();

                                Update();

                                Status.Foreground = Brushes.White;
                                Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
                            }
                            else
                            {
                                Status.Foreground = Brushes.Red;
                                Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>";
                            }
                        }
                        else
                        {
                            Status.Foreground = Brushes.Red;
                            Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
                        }
                    }
                    else
                    {
                        Status.Foreground = Brushes.Red;
                        Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
                    }
                }
                else
                {
                    Status.Foreground = Brushes.Red;
                    Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
                }
            }
            else
            {
                Status.Foreground = Brushes.Red;
                Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
            }
        }
        catch
        {
            Status.Foreground = Brushes.Red;
            Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
        }
    }

    void DeleteProduct(object sender, RoutedEventArgs e)
    {
        if (ListProducts.SelectedItem != null)
        {
            Product product = db.Products.Where(it => it == ListProducts.SelectedItem).FirstOrDefault();
            db.Products.Remove(product);
            db.SaveChanges();

            Update();

            Status.Foreground = Brushes.Green;
            Status.Text = "<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
        }
    }

    void Update()
    {
        ProductsitemSource = new ObservableCollection<Product>(db.Products.OrderByDescending(it => it.Id));
        ListProducts.ItemsSource = ProductsitemSource;
    }
    void Exit(object sender, RoutedEventArgs e)
    {
        new MainWindow().Show();
        Close();
    }
}