private void button2_Click(object sender, EventArgs e)
        {
            tela_consulta_ocorrencia telas = new tela_consulta_ocorrencia();

            Lista_DataGrids listar = new Lista_DataGrids();
            DataSet         ds     = new DataSet();

            ds = listar.listarTodos();
            dataGridView1.DataSource            = ds.Tables[3];
            dataGridView1.Columns[0].HeaderText = "N° Orçamento";
            dataGridView1.Columns[1].HeaderText = "N° Ocorrência";
            dataGridView1.Columns[2].HeaderText = "Status";
            dataGridView1.Columns[3].HeaderText = "Tipo orçamento";
            dataGridView1.Columns[4].HeaderText = "Descrição";
            dataGridView1.Columns[5].HeaderText = "Data conclusão";
            dataGridView1.Columns[6].HeaderText = "Valor";
            dataGridView1.Columns[7].HeaderText = "Motivo";
            dataGridView1.Refresh();
        }