private void lendButton_Click(object sender, EventArgs e)//借阅,当图书可用时将图书的状态改为借阅
{
if (yearComboBox.Text != "" && monthComboBox.Text != "" && dayComboBox.Text != "")
{
string year = yearComboBox.Text;
string month = monthComboBox.Text;
string day = dayComboBox.Text;
BookShelfService.LendBook(currentBook, currentClient, year, month, day);
}
else
{
MessageBox.Show("没有输入正确的日期！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}