How to pass a data to a report parameter

How pass data to a report parameter using report viewer for 2008.

Note: Report viewer for 2008 express edition is just an add on component is it not part of the visual web studio.

Assuming that we have a report named rpt_report1.rdlc and the parameter named wkcldr

In our .aspx page we have a ReportViewer named rptVDiversions as shown below

<rsweb:ReportViewer ID="rptVDiversions" runat="server" Font-  

            Names="Verdana"

            Font-Size="8pt" Height="400px" Width="909px">

            <LocalReport ReportPath="rpt_report1.rdlc">

                <DataSources>

                    <rsweb:ReportDataSource

DataSourceId="someDataSource"

                        Name="someName" />

                </DataSources>

            </LocalReport>

</rsweb:ReportViewer>

In code behind

using Microsoft.Reporting.WebForms; //

protected void ShowReport()

{

ReportParameter _rptParamWkcldr = new ReportParameter("wkcldr","data to pass");

//create instance

List<ReportParameter> wkcldr = new List<ReportParameter>();

wkcldr.Add(_rptParamWkcldr);

this.rptVDiversions.LocalReport.ReportPath = "rpt_report1.rdlc";

this.rptVDiversions.LocalReport.SetParameters(wkcldr);

}