protected void btnRefreshOverdues_Click(object sender, EventArgs e)
        {
            //All Overdue Books
            LibrarianLogic ll = new LibrarianLogic();

            ll.CreateOverdueLoan();
            DataTable tblOverdues = ll.GetOverdueInformation();

            GridView1.DataSource = tblOverdues;
            GridView1.DataBind();
        }
        protected void btnReport3_Click(object sender, EventArgs e)
        {
            btnRefreshOverdues.Visible = true;

            //All Overdue Books
            LibrarianLogic ll          = new LibrarianLogic();
            DataTable      tblOverdues = ll.GetOverdueInformation();

            GridView1.DataSource = tblOverdues;
            GridView1.DataBind();
        }