private void 添加书籍_Click(object sender, EventArgs e)
{
// 借书
BookQueryAndBor subForm = new BookQueryAndBor();
subForm.Show();
}
private void 借书ToolStripMenuItem_Click(object sender, EventArgs e)
{ //借书
BookQueryAndBor subForm = new BookQueryAndBor();
subForm.Show();
}