private void tabPage1_Enter(object sender, EventArgs e)
{
sisDBADM obj = new sisDBADM();
cbCad_UF.DataSource = obj.listUF();
cbCad_UF.DisplayMember = "Sigla";
}
private void tabPage2_Enter(object sender, EventArgs e)
{
sisDBADM obj = new sisDBADM();
cbEd_UF.DataSource = obj.listUF();
cbEd_UF.DisplayMember = "Sigla";
dgEditarAluno.DataSource = obj.ListaGrid();
}