Dynamically set report viewer report name

Question

<p>I have a CR4E application with several reports. I want to use the same viewer for each report in the app but need to change the report name based on the user&#39;s selection from a dropdown list on a form. How do I dynamically change the reportName in the viewer?<br />Thanks, Bill</p>

Answer 1

The viewer takes reportSource objects to display reports. The trick is to always have viewer in a seperate page from the rest of your business logic.
I created a sample for you where I have a page that has two links. Both links go to the same jsp page but they display different reports depending on the variables placed in the URL. My viewer page then reads the URL to discover which report you want display.Â
First Page:Â
<</font>body>
<<font size="2" color="#3f7f7f">a href="DynamicReportViewer.jsp?report=CrystalReport1.rpt" > Report1 </</font>a><</font>br>
<</font>a href="DynamicReportViewer.jsp?report=CrystalReport2.rpt" /a>Report2 </</font>a><</font>br>
</<font size="2" color="#3f7f7f">body>
JSP CODE to display reports
String reportName;
reportName = (String)request.getParameter("report");
ReportClientDocument clientDoc = (ReportClientDocument) session.getAttribute(reportName);
<font size="2" color="#7f0055">if</font>(clientDoc ==<font size="2" color="#7f0055">null</font>) {clientDoc =<font size="2" color="#7f0055">new</font>ReportClientDocument();
clientDoc.open(reportName, OpenReportOptions._openAsReadOnly);
session.setAttribute(reportName, clientDoc);
CrystalReportViewer crystalReportPageViewer =<font size="2" color="#7f0055">new</font>CrystalReportViewer();
IReportSource reportSource = clientDoc.getReportSource();
crystalReportPageViewer.setReportSource(reportSource);
crystalReportPageViewer.setOwnPage(<font size="2" color="#7f0055">true</font>); crystalReportPageViewer.setOwnForm(<font size="2" color="#7f0055">true</font>);
crystalReportPageViewer.processHttpRequest(request, response, application, <font size="2" color="#7f0055">null</font>);
Rob Horne
http://diamond.businessobjects.com/blog/10