private void addReader_Click(object sender, EventArgs e)
{
NewReaderForm newReader = new NewReaderForm(readers);
newReader.Show();
newReader.FormClosing += HandleNewReader;
}
//办理借书证
private void CardRegistor(object sender, EventArgs e)
{
NewReaderForm nr = new NewReaderForm();
nr.MdiParent = this;
nr.StartPosition = FormStartPosition.CenterScreen;
nr.WindowState = FormWindowState.Maximized;
nr.Show();
}