private void VisualizarRptPeriodo_Load(object sender, EventArgs e)
        {
            try
            {
                NpgsqlConnection conn = new NpgsqlConnection("Server=localhost; Port=5432; User Id=postgres; Password=@postgre; Database=ouvidoria;");
                conn.Open();
                NpgsqlCommand comando = new NpgsqlCommand("SELECT * FROM manifestacao WHERE data_gravacao BETWEEN @dataInicial AND @dataFinal", conn);
                comando.Parameters.AddWithValue("@dataInicial", dataInicial);
                comando.Parameters.AddWithValue("@dataFinal", dataFinal);

                NpgsqlDataAdapter da           = new NpgsqlDataAdapter(comando);
                DataSet           ds           = new DataSet();
                DataTable         manifestacao = new DataTable();
                da.Fill(manifestacao);
                RptPeriodo rptPeriodo = new RptPeriodo();
                rptPeriodo.SetDataSource(manifestacao);
                crystalReportViewerPeriodo.ReportSource = rptPeriodo;
                crystalReportViewerPeriodo.Refresh();

                this.WindowState = FormWindowState.Maximized;
            }
            catch
            {
                MessageBox.Show("PostgreSQL Error!", "Erro!", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        public virtual CrystalDecisions.CrystalReports.Engine.ReportDocument CreateReport()
        {
            RptPeriodo rpt = new RptPeriodo();

            rpt.Site = this.Site;
            return(rpt);
        }