private void ad_ba_Click(object sender, EventArgs e)
 {
     ad_clicked.Location = ad_ba.Location;
     BUS.AllocationBLL t = new BUS.AllocationBLL();
     uc_al.dgvAllocation.DataSource = t.getAllAllocations();
     uc_db.Hide();
     uc_us.Hide();
     uc_at.Hide();
     uc_cs.Hide();
     uc_ep.Hide();
     uc_al.Show();
 }