private void acceptButton_Click(object sender, EventArgs e) { RequestManager aRequestManager = new RequestManager(); if (requestedBookIDTextBox.Text != "" && requestedReaderTextBox.Text != "") { MessageBox.Show(aRequestManager.AcceptThisRequest(requestedReaderTextBox.Text) + "\n\n" + aRequestManager.UpdateBookQuantity(requestedBookIDTextBox.Text) + "\n\n" + aRequestManager.UpdateBookReader(requestedReaderTextBox.Text, DateTime.Today)); LoadBookListGridView(); requestedReaderTextBox.Clear(); requestedBookIDTextBox.Clear(); LoadRequestGridView(); LoadReaderListGridView(); } else { MessageBox.Show("Fill up the required field"); } }