private void signInButton_Click(object sender, EventArgs e)//登录,完成
        {
            FormRegisterandSignin formRegisterandSignin = new FormRegisterandSignin(1);

            if (formRegisterandSignin.ShowDialog() == DialogResult.OK)
            {
                currentClient = formRegisterandSignin.currentClient;
                if (currentClient != null)
                {
                    nameTextBox.ReadOnly        = false;
                    nameTextBox.Text            = currentClient.Name;
                    nameTextBox.ReadOnly        = true;
                    this.signOutButton.Visible  = true;
                    this.signOutButton.Enabled  = true;
                    this.signInButton.Visible   = false;
                    this.signInButton.Enabled   = false;
                    this.registerButton.Visible = false;
                    this.registerButton.Enabled = false;
                    if (currentClient.Name == "管理员")
                    {
                        this.manageButton.Visible = true;
                        this.manageButton.Enabled = true;
                    }
                    appointBooks = BookShelfService.GetAllAppointedBooks(currentClient);
                    lendBooks    = BookShelfService.GetAllLentBooks(currentClient);
                    appointBindingSource.DataSource = appointBooks;
                    lendBindingSource.DataSource    = lendBooks;
                }
            }
        }
        private void manageButton_Click(object sender, EventArgs e)//图书管理,完成
        {
            FormShelf formShelf = new FormShelf(currentClient);

            if (formShelf.ShowDialog() == DialogResult.OK)
            {
                Query(1);
                appointBooks = BookShelfService.GetAllAppointedBooks(currentClient);
                lendBooks    = BookShelfService.GetAllLentBooks(currentClient);
                appointBindingSource.DataSource = appointBooks;
                lendBindingSource.DataSource    = lendBooks;
            }
        }
        private void intoDetailButton_Click(object sender, EventArgs e)//查看细节,完成
        {
            if (currentClient == null)
            {
                MessageBox.Show("请登录后再进行此操作!");
                return;
            }
            Book           book           = booksBindingSource.Current as Book;
            FormBookDetail formBookDetail = new FormBookDetail(book, currentClient, 1);

            if (formBookDetail.ShowDialog() == DialogResult.OK)
            {
                Query(1);
                appointBooks = BookShelfService.GetAllAppointedBooks(currentClient);
                lendBooks    = BookShelfService.GetAllLentBooks(currentClient);
                appointBindingSource.DataSource = appointBooks;
                lendBindingSource.DataSource    = lendBooks;
            }
        }
        private void cancellButton_Click(object sender, EventArgs e)//取消预约,完成
        {
            Book book = appointBindingSource.Current as Book;

            if (book == null)
            {
                MessageBox.Show("请选择一本书进行操作!");
                return;
            }
            BookShelfService.CancellAppoint(book, currentClient);
            appointBooks = new List <Book>();
            appointBindingSource.DataSource = appointBooks;
            appointBooks = BookShelfService.GetAllAppointedBooks(currentClient);
            appointBindingSource.ResetBindings(false);
            appointBindingSource.DataSource = appointBooks;
            Books = new List <Book>();
            booksBindingSource.DataSource = Books;
            Books = BookShelfService.AllBooks();
            booksBindingSource.ResetBindings(false);
            booksBindingSource.DataSource = Books;
            Query(1);
        }