C#

crvSTT.RefreshReport();
ReportDocument rptDoc = new ReportDocument();
rptDoc.Load(Server.MapPath("Reports/STTCertificateAnnual1.rpt"));

ParameterFields paramFields = new ParameterFields();

ParameterField pfYear = new ParameterField(); 
ParameterField pfBACode = new ParameterField();
ParameterField pfFromClientCode = new ParameterField();
ParameterField pfToClientCode = new ParameterField();

pfBACode.ParameterFieldName = "pBACode";
ParameterDiscreteValue pdvBACode;
pdvBACode = new ParameterDiscreteValue();
pdvBACode.Value = strUserId;
pfBACode.CurrentValues.Add(pdvBACode);
paramFields.Add(pfBACode);

pfFromClientCode.ParameterFieldName = "pFromClientCode";
ParameterDiscreteValue pdvFromClientCode;
pdvFromClientCode = new ParameterDiscreteValue();
pdvFromClientCode.Value = txtFromCC.Text;
pfFromClientCode.CurrentValues.Add(pdvFromClientCode);
paramFields.Add(pfFromClientCode);


pfToClientCode.ParameterFieldName = "pToClientCode";
ParameterDiscreteValue pdvToClientCode;
pdvToClientCode = new ParameterDiscreteValue();
pdvToClientCode.Value = txtToCC.Text;
pfToClientCode.CurrentValues.Add(pdvToClientCode);
paramFields.Add(pfToClientCode);


pfYear.ParameterFieldName = "pYear";
ParameterDiscreteValue pdvYear;
pdvYear = new ParameterDiscreteValue();
pdvYear.Value = "Current";
pfYear.CurrentValues.Add(pdvYear);
paramFields.Add(pfYear);                    

   
crvSTT.ParameterFieldInfo = paramFields;
crvSTT.ReportSource = rp.tDoc;
crvSTT.DataBind();   

[Serializable]
public class ParticipantList : List<Participant>
{
  private Guid _ID = Guid.NewGuid();
  public Guid ID
  {
    get { return _ID; }
    set { _ID = value; }
  }

  public static void ToFile(ParticipantList list, string filename)
  {
    using (FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write))
    {
      XmlSerializer xs = new XmlSerializer(typeof(ParticipantList));
      xs.Serialize(fs, list);
    }
  }

  public static ParticipantList FromFile(string filename)
  {
    using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
    {
      XmlSerializer xs = new XmlSerializer(typeof(ParticipantList));
      return (ParticipantList)xs.Deserialize(fs);
    }
  }
}