private void UpdateBTN_Click(object sender, EventArgs e) { if (book == null) { MessageBox.Show("select a book"); } else { bool Isopen = false; foreach (Form f in Application.OpenForms) { if (f.Text == "Book_List") { Isopen = true; f.BringToFront(); break; } } if (Isopen == false) { Book_List bl = new Book_List(book, "update"); bl.Show(); } } }
private void Button_Click(object sender, EventArgs e) { Button button = sender as Button; if (button.Name.Equals("newbook_Btn")) { bool Isopen = false; foreach (Form f in Application.OpenForms) { if (f.Text == "Book_List") { Isopen = true; f.BringToFront(); break; } } if (Isopen == false) { Book_List bl = new Book_List(); bl.Show(); } } }