private void button1_Click(object sender, EventArgs e)
{
List <String> bnums = new List <String>();
Boolean copies_flag = false, ownership_flag = false;
for (int i = 0; i < dt.Rows.Count; i++)
{
if (Convert.ToBoolean(dataGridView1.Rows[i].Cells[0].Value) == true)
{
if (Convert.ToInt32(dt.Rows[i].ItemArray[3].ToString()) > 0)
{
foreach (Book value in user.BOOKS)
{
if (value.BNUM == Convert.ToInt32(dt.Rows[i].ItemArray[0]))
{
ownership_flag = true;
}
}
bnums.Add(dt.Rows[i].ItemArray[0].ToString());
}
else
{
copies_flag = true;
}
}
}
if (copies_flag == true)
{
MessageBox.Show("One or more of the selected books is not in stock!", "Message");
return;
}
if (ownership_flag == true)
{
MessageBox.Show("You already have one or more of the selected books!", "Message");
return;
}
int num;
dataGridView1.Columns[4].ReadOnly = false;
for (int i = 0; i < dt.Rows.Count; i++)
{
if (bnums.Contains(dt.Rows[i].ItemArray[0].ToString()))
{
num = Convert.ToInt32(dt.Rows[i].ItemArray[3].ToString()) - 1;
dataGridView1.Rows[i].Cells[4].Value = num;
dt.Rows[i].ItemArray[3] = num;
}
}
dataGridView1.Columns[4].ReadOnly = true;
dt = db.UpdateTable(db.TLIBRARY, "Book_Number, Book_Count", "Department = 0 OR Department = " + (int)user.DEPT, dt);
foreach (Book value in user.BOOKS)
{
bnums.Add(value.BNUM.ToString());
}
String book_code = user.encrypt_books(bnums);
db.SimpleUpdate(db.TSTUDENT, "Books = '" + book_code + "'", "id = " + user.ID);
user.decrypt_books(book_code);
MessageBox.Show("You have successfully taken all the selected books!", "Message");
foreach (DataGridViewRow value in dataGridView1.Rows)
{
DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell)value.Cells[0];
chk.Value = false;
}
}