//for saving lease
protected void btnLease_Click(object sender, EventArgs e)
{
MarinaManager mm = new MarinaManager();
int custID = int.Parse(Session["CustomerID"].ToString());
int spId = int.Parse(txtSlipLease.Text);
mm.SaveLease(custID, spId);
//Shows the updated leased slip list
grdLesSlp.DataSource = mm.GetLeaseSlip();
grdLesSlp.DataBind();
}