private void buttonEdit_Click(object sender, EventArgs e)
{
try
{
if (listViewBooks.SelectedItems.Count == 1)
{
BooksSet booksSet = listViewBooks.SelectedItems[0].Tag as BooksSet;
booksSet.Name = textBoxName.Text;
booksSet.StockBalance = textBoxStockBalance.Text;;
if (textBoxPrice.Text == "" || textBoxAuthor.Text == "" || textBoxName.Text == "")
{
throw new Exception("Обязательные данные не заполнены!");
}
else
{
booksSet.Name = textBoxName.Text;
booksSet.Author = textBoxAuthor.Text;
booksSet.Price = Convert.ToInt32(textBoxPrice.Text);
}
Program.lab.SaveChanges();
ShowBooks();
}
}
catch (Exception ex) { MessageBox.Show("" + ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Information); }
}
private void buttonAdd_Click(object sender, EventArgs e)
{
try
{
BooksSet booksSet = new BooksSet();
if (textBoxStockBalance.Text != "")
{
booksSet.StockBalance = textBoxStockBalance.Text;
}
else
{
booksSet.StockBalance = null;
}
if (textBoxPrice.Text == "" || textBoxAuthor.Text == "" || textBoxName.Text == "")
{
throw new Exception("Обязательные данные не заполнены");
}
else
{
booksSet.Price = Convert.ToInt32(textBoxPrice.Text);
booksSet.Name = textBoxName.Text;
booksSet.Author = textBoxAuthor.Text;
}
Program.lab.BooksSet.Add(booksSet);
Program.lab.SaveChanges();
ShowBooks();
} catch (Exception ex) { MessageBox.Show("" + ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Information); }
}
private void listViewBooks_SelectedIndexChanged(object sender, EventArgs e)
{
if (listViewBooks.SelectedItems.Count == 1)
{
BooksSet booksSet = listViewBooks.SelectedItems[0].Tag as BooksSet;
textBoxName.Text = booksSet.Name;
textBoxAuthor.Text = booksSet.Author;
textBoxStockBalance.Text = booksSet.StockBalance;
textBoxPrice.Text = booksSet.Price.ToString();
}
else
{
textBoxName.Text = "";
textBoxAuthor.Text = "";
textBoxStockBalance.Text = "";
textBoxPrice.Text = "";
}
}
private void buttonDel_Click(object sender, EventArgs e)
{
try
{
if (listViewBooks.SelectedItems.Count == 1)
{
BooksSet booksSet = listViewBooks.SelectedItems[0].Tag as BooksSet;
Program.lab.BooksSet.Remove(booksSet);
Program.lab.SaveChanges();
ShowBooks();
}
textBoxName.Text = "";
textBoxAuthor.Text = "";
textBoxStockBalance.Text = "";
textBoxPrice.Text = "";
}
catch
{
MessageBox.Show("Невозможно удалить, эта запись используется!", "Ошибка!", MessageBoxButtons.OK, MessageBoxIcon.Error);;
}
}
