private void Frm_Impresion_Presupuesto_Load(object sender, EventArgs e)
    {
        ConnectionInfo myConnectionInfo = new ConnectionInfo();
        myConnectionInfo.ServerName = System.Environment.MachineName;

        myConnectionInfo.DatabaseName = "DIENTE_SANOS";
        myConnectionInfo.UserID = "ODONTOLOGIA";
        myConnectionInfo.Password = "ODONTOLOGIA";
        myConnectionInfo.IntegratedSecurity = false;
        rd = new ReportDocument();
        ParameterField pco = new ParameterField();
        ParameterFields pfields = new ParameterFields();
        ParameterDiscreteValue pdvc = new ParameterDiscreteValue();

        pco.Name = "@CODPRE";
        pdvc.Value = SecPre;

        pco.CurrentValues.Add(pdvc);
        pfields.Add(pco);

        crystalReportViewer1.ParameterFieldInfo = pfields;
        SetDBLogonForReport(myConnectionInfo);
        rd.Load("D:/Reporte/Reporte_Presupuesto.rpt");
        crystalReportViewer1.ReportSource = rd;
        SetDBLogonForReport(myConnectionInfo);
    }

    ReportDocument rd = new ReportDocument();

    private void SetDBLogonForReport(ConnectionInfo connectionInfo)
    {
        TableLogOnInfos tableLogOnInfos = crystalReportViewer1.LogOnInfo;
        foreach (TableLogOnInfo tableLogOnInfo in tableLogOnInfos)
        {
            tableLogOnInfo.ConnectionInfo = connectionInfo;
        }

    }