protected void btnduedatesubmit_Click(object sender, EventArgs e) { DateTime duedate; if (txtDueDate.Text != "") { duedate = Convert.ToDateTime(txtDueDate.Text); } else { duedate = Convert.ToDateTime("01/01/1900"); } Utilities_Licensing.UpdateDuedateinFinance(Convert.ToInt32(hfdduedateid.Value), txt_edit_amount.Text, chk_edit_recurringfee.Checked, ddl_edit_days.SelectedItem.Text, duedate); altbox("Record updated successfully."); hfdduedateid.Value = "0"; }