Component-oriented-programming/LibraryWinFormsApp/FormBook.cs

using DocumentFormat.OpenXml.Office2010.Excel;
using Library_var_4_lab_1;
using LibraryContracts.StorageContracts;
using LibraryDatabase.Models;
using LibraryDatabase.Storages;
using LibraryDataModels.Dtos;
using LibraryDataModels.Views;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls.Primitives;
using System.Windows.Forms;
using static LibraryUtils.ImageConverter.ImageConverter;

namespace LibraryWinFormsApp
{
	public partial class FormBook : Form
	{
		public int _id { get; set; } = -1;
		private string _cover { get; set; } = string.Empty;
		private BookView? _book = null;
		private IBookStorage _bookStorage;
		private IAuthorStorage _authorStorage;
		public FormBook(IBookStorage bookStorage, IAuthorStorage authorStorage)
		{
			InitializeComponent();
			_bookStorage = bookStorage;
			_authorStorage = authorStorage;
		}

		private void FormBook_Load(object sender, EventArgs e)
		{
			LoadData();
		}

		private void LoadData()
		{
			try
			{
				releaseDateField.Template = @"^([1-9]|[12][0-9]|3[01]) (января|февраля|марта|апреля|мая|июня|июля|августа|сентября|октября|ноября|декабря) [0-9]{4}$";
				var authors = _authorStorage.GetFullList();
				if (authors != null)
				{
					foreach (var author in authors)
					{
						authorField.Input(author.Name);
					}
				}
				if (_id != -1)
				{
					_book = _bookStorage.GetElement(new BookDto()
					{
						Id = _id,
					});
					if (_book != null)
					{
						_cover = _book.BookCover;
						nameField.Text = _book.Name;
						releaseDateField.Date = _book.ReleaseDate;
						authorField.SelectedItem = _book.Author;
						try
						{
							pictureBox.Image = StringToImage(_cover);
						}
						catch
						{
							return;
						}
					}
				}
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}

		private void FormBook_FormClosing(object sender, FormClosingEventArgs e)
		{
			try
			{
				bool Changed = false;
				if (_book == null)
				{
					if (!string.IsNullOrEmpty(_cover))
						Changed = true;
					if (!string.IsNullOrEmpty(nameField.Text))
						Changed = true;
					if (!string.IsNullOrEmpty(releaseDateField.Text))
						Changed = true;
					if (!string.IsNullOrEmpty(authorField.Text))
						Changed = true;
				}
				else
				{
					if (_cover != _book.BookCover)
						Changed = true;
					if (nameField.Text != _book.Name)
						Changed = true;
					if (releaseDateField.Date != _book.ReleaseDate)
						Changed = true;
					if (authorField.SelectedItem != _book.Author)
						Changed = true;
				}
				if (Changed)
				{
					DialogResult dialogResult = MessageBox.Show("Изменения не были сохранены. Всё равно выйти?", "Внимание!", MessageBoxButtons.YesNo);
					if (dialogResult == DialogResult.No)
					{
						e.Cancel = true;
					}
				}
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}

		private void saveButton_Click(object sender, EventArgs e)
		{
			try
			{
				if (string.IsNullOrEmpty(_cover))
				{
					throw new Exception("Выберите обложку");
				}
				var book = new BookDto()
				{
					Name = nameField.Text,
					BookCover = _cover,
					Author = authorField.SelectedItem,
					ReleaseDate = releaseDateField.Date,
				};
				if (_id != -1)
				{
					book.Id = _id;
					_book = _bookStorage.Update(book);
				}
				else
				{
					_book = _bookStorage.Insert(book);
				}
				_id = _book?.Id ?? -1;
				_cover = _book?.BookCover ?? string.Empty;
				Close();
			}
			catch (Exception ex)
			{
				MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}

		private void changeCoverButton_Click(object sender, EventArgs e)
		{

			var dialog = new OpenFileDialog();

			dialog.Title = "Выберите изображение";
			dialog.Filter = "Изображения|*.jpg;*.jpeg;*.png;*.bmp";

			if (dialog.ShowDialog() == DialogResult.OK)
			{
				var image_new = new Bitmap(dialog.FileName);
				pictureBox.Image = image_new;
				_cover = ImageToString(image_new);
			}

			dialog.Dispose();
		}
	}
}