protected void IssueButton_Click(object sender, EventArgs e) { if (memberIdTextBox.Text != "" && bookIdTextBox.Text != "") { IssueBook issueBook = new IssueBook(); Book book = new Book(); Member member = new Member(); member.Id = Convert.ToInt32(memberIdTextBox.Text); issueBook.Member = member; book.BookId = Convert.ToInt32(bookIdTextBox.Text); issueBook.Book = book; issueBook.StartDate = startDateTextBox.Text; issueBook.ReturnDate = returnDateTextBox.Text; if (memberManager.GetMemberForIssuedBook(member.Id) == true && bookManager.CheckBookCurrentStock(book.BookId) == true) { if (!issuedBookManager.CheckIssuedBookExisting(member.Id, book.BookId)) { string message = issuedBookManager.IssuedBook(issueBook); string message2 = bookManager.UpdateBookForCurrentStock(book); Response.Write("<script>alert('" + message + "');</script>"); GridView1.DataBind(); Clean(); } else { Response.Write("<script>alert('This Member Already Has The book');</script>"); } } else { Response.Write("<script>alert('Please Insert Book Id and Member Id or Book Stock out');</script>"); } } else { Response.Write("<script>alert('Please Insert Book Id and Member Id');</script>"); } }