private void button2_Click(object sender, EventArgs e)
{
if (Userhelp.Lend_num() > 0)
{
if (Bookhelp.Have_book(click_book))
{
if (Bookhelp.LendBook(click_book) && Userhelp.User_lend())
{
MessageBox.Show("借书成功！");
Userhelp.Record_Lend(click_book);
}
else
{
MessageBox.Show("借书失败！");
}
}
else
{
MessageBox.Show("此书余量不足！");
}
}
else
{
MessageBox.Show("可借次数不足！");
}
}
public Back_Book()
{
InitializeComponent();
init_grid();
count = Userhelp.Lend_num();
name.Text = Userhelp.ruid;
lend_num.Text = count.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
if (!sernum.Equals(""))
{
if (Userhelp.Back_book(sernum))
{
Userhelp.update_ustate();
bookcount = Bookhelp.BookNum(bookid);
bookcount++;
Bookhelp.UpdateBook_lend(bookid, bookcount.ToString());
MessageBox.Show("还书成功！");
init_grid();
lend_num.Text = Userhelp.Lend_num().ToString();
}
else
{
MessageBox.Show("本书已归还！请勿重复操作！");
}
}
else
{
MessageBox.Show("没有选择的书目！");
}
}