private void button4_Click(object sender, EventArgs e)
{
try
{
Reader r = new Reader();
context c = new context();
loan l = new loan(usernametxt.Text, Convert.ToInt32(ReaderIDtxt.Text));
c.Setstrategy(new loan(usernametxt.Text, Convert.ToInt32(ReaderIDtxt.Text)));
if (r.Data_is_correct(usernametxt.Text, Convert.ToInt32(ReaderIDtxt.Text)) == 1)
{
if (l.Check_data_is_true_in_request(ISBNtxt.Text) == 0)
{
if (r.Checking_block_or_not(usernametxt.Text, Convert.ToInt32(ReaderIDtxt.Text)))
{
if (c.Execute_strategy(ISBNtxt.Text))
{
MessageBox.Show("Done");
}
else
{
MessageBox.Show("Unfortunately there are no copies from this book");
}
}
else
{
MessageBox.Show("Unfortunately you are blocked");
}
}
else
{
MessageBox.Show("There is the same data for current request");
}
}
else
{
MessageBox.Show("Error in Data you entered");
}
}
catch (Exception)
{
MessageBox.Show("You forget to enter some data");
}
}
