private void InitializeComboBoxSages()
{
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
comboBoxSages.Items.AddRange(context.Sages.ToArray());
}
}
private void InitializeDataGridViewSage()
{
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
bindingSourceSage.DataSource = context.Sages.Select(s => new
{
Id = s.Id,
Name = s.Name,
Age = s.Age
}).ToArray();
dataGridViewSage.DataSource = bindingSourceSage;
}
}
private void InitializeDataGridViewBook()
{
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
bindingSourceBook.DataSource = context.Books.Select(b => new
{
Id = b.Id,
Name = b.Name,
Price = b.Price,
SageId = b.SageId
}).ToArray();
dataGridViewBook.DataSource = bindingSourceBook;
}
}
private void deleteToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
int sageId = Convert.ToInt32(dataGridViewSage.SelectedRows[0].Cells["Id"].Value);
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
Sage sage = context.Sages.Where(s => s.Id == sageId).FirstOrDefault();
context.Sages.Remove(sage);
context.SaveChanges();
}
InitializeDataGridViewSage();
}
catch { MessageBox.Show("Selected row == null"); }
}
private void buttonUpdate_Click(object sender, EventArgs e)
{
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
Sage sage = context.Sages.Where(s => s.Id == sageId).FirstOrDefault();
if (!string.IsNullOrWhiteSpace(textBoxName.Text) &&
!string.IsNullOrWhiteSpace(textBoxAge.Text))
{
sage.Name = textBoxName.Text;
sage.Age = Convert.ToInt32(textBoxAge.Text);
context.SaveChanges();
}
this.Dispose();
this.Close();
}
}
private void buttonUpdate_Click(object sender, EventArgs e)
{
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
Book book = context.Books.Where(b => b.Id == bookId).FirstOrDefault();
if (!string.IsNullOrWhiteSpace(textBoxName.Text) &&
!string.IsNullOrWhiteSpace(textBoxPrice.Text) && book != null)
{
book.Name = textBoxName.Text;
book.Price = Convert.ToInt32(textBoxPrice.Text);
context.SaveChanges();
}
this.Dispose();
this.Close();
}
}
private void buttonInsert_Click(object sender, EventArgs e)
{
if (!string.IsNullOrWhiteSpace(textBoxName.Text) &&
!string.IsNullOrWhiteSpace(textBoxAge.Text))
{
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
Sage sage = new Sage()
{
Name = textBoxName.Text,
Age = Convert.ToInt32(textBoxAge.Text)
};
context.Sages.Add(sage);
context.SaveChanges();
}
this.Dispose();
this.Close();
}
}
private void buttonInsert_Click(object sender, EventArgs e)
{
if (!string.IsNullOrWhiteSpace(textBoxName.Text) &&
!string.IsNullOrWhiteSpace(textBoxPrice.Text) &&
!string.IsNullOrWhiteSpace(comboBoxSages.Text))
{
using (SagesAndBooksEntities context = new SagesAndBooksEntities())
{
Book book = new Book()
{
Name = textBoxName.Text,
Price = Convert.ToInt32(textBoxPrice.Text),
SageId = (comboBoxSages.SelectedItem as Sage).Id
};
context.Books.Add(book);
context.SaveChanges();
}
this.Dispose();
this.Close();
}
}
