private void ButtonAdd_Click(object sender, EventArgs e)
{
if (textBoxTitle.Text != "" && textBoxAuthor.Text != "" &&
textBoxPrice.Text != "" && comboBoxGenre.SelectedItem != null)
{
BookSet book = new BookSet();
book.Title = textBoxTitle.Text;
book.Author = textBoxAuthor.Text;
if (comboBoxGenre.SelectedIndex == 0)
{
book.Genre = 0;
}
else if (comboBoxGenre.SelectedIndex == 1)
{
book.Genre = 1;
}
else if (comboBoxGenre.SelectedIndex == 2)
{
book.Genre = 2;
}
book.Price = Convert.ToInt32(textBoxPrice.Text);
Program.litRes.BookSet.Add(book);
Program.litRes.SaveChanges();
ShowBookSet();
}
else
{
MessageBox.Show("Заполните обязательные поля!", "Ошибка",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void ButtonDel_Click(object sender, EventArgs e)
{
try
{
if (comboBoxGenre.SelectedIndex == 0)
{
if (listViewBooks.SelectedItems.Count == 1)
{
BookSet book = listViewBooks.SelectedItems[0].Tag as BookSet;
Program.litRes.BookSet.Remove(book);
Program.litRes.SaveChanges();
ShowBookSet();
}
textBoxTitle.Text = "";
textBoxAuthor.Text = "";
textBoxPrice.Text = "";
}
else if (comboBoxGenre.SelectedIndex == 1)
{
if (listViewBooks.SelectedItems.Count == 1)
{
BookSet book = listViewBooks.SelectedItems[0].Tag as BookSet;
Program.litRes.BookSet.Remove(book);
Program.litRes.SaveChanges();
ShowBookSet();
}
textBoxTitle.Text = "";
textBoxAuthor.Text = "";
textBoxPrice.Text = "";
}
else if (comboBoxGenre.SelectedIndex == 2)
{
if (listViewBooks.SelectedItems.Count == 1)
{
BookSet book = listViewBooks.SelectedItems[0].Tag as BookSet;
Program.litRes.BookSet.Remove(book);
Program.litRes.SaveChanges();
ShowBookSet();
}
textBoxTitle.Text = "";
textBoxAuthor.Text = "";
textBoxPrice.Text = "";
}
}
catch
{
MessageBox.Show("Невозможно удалить, эта запись используется!", "Ошибка!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void ListViewBooks_SelectedIndexChanged(object sender, EventArgs e)
{
if (listViewBooks.SelectedItems.Count == 1)
{
BookSet book = listViewBooks.SelectedItems[0].Tag as BookSet;
textBoxTitle.Text = book.Title;
textBoxAuthor.Text = book.Author;
comboBoxGenre.Text = book.Genre.ToString();
textBoxPrice.Text = book.Price.ToString();
}
else
{
textBoxTitle.Text = "";
textBoxAuthor.Text = "";
comboBoxGenre.SelectedItem = null;
textBoxPrice.Text = "";
}
}
private void ButtonEdit_Click(object sender, EventArgs e)
{
try
{
if (listViewBooks.SelectedItems.Count == 1)
{
BookSet book = listViewBooks.SelectedItems[0].Tag as BookSet;
if (textBoxTitle.Text != "" && textBoxAuthor.Text != "" &&
textBoxPrice.Text != "" && comboBoxGenre.SelectedItem != null)
{
throw new Exception("Заполните обязательные поля!");
}
book.Title = textBoxTitle.Text;
book.Author = textBoxAuthor.Text;
if (comboBoxGenre.SelectedIndex == 0)
{
book.Genre = 0;
}
else if (comboBoxGenre.SelectedIndex == 1)
{
book.Genre = 1;
}
else if (comboBoxGenre.SelectedIndex == 2)
{
book.Genre = 2;
}
book.Price = Convert.ToInt32(textBoxPrice.Text);
Program.litRes.SaveChanges();
ShowBookSet();
}
}
catch (Exception ex) { MessageBox.Show("" + ex.Message, "Внимание",
MessageBoxButtons.OK, MessageBoxIcon.Information); }
}