Not able to export context data to excel in NWDS 7.1

Question

Hi all,
We have a requirement wherein I need to export data from a local context node to an excel file. I am using jxl.jar for this purpose.
I am using a FileDownload UI element to generate the excel. I am working with NWDS 7.1 EhP1.
I am using the following code :
public void excel_download( )
     IWDCachedWebResource cachedExcelResource = null;
     String fileName = "TestExcel.xls";
     File f = new File(fileName);
     WritableWorkbook workbook = Workbook.createWorkbook(f);
     FileInputStream excelCSVFile = new FileInputStream(f);
     cachedExcelResource =getCachedWebResource(excelCSVFile,fileName,WDWebResourceType.getWebResourceType("xls","application/ms-excel"));
     wdContext.currentContextElement().setResource(cachedExcelResource);
     workbook.close();
     f.delete();
private IWDCachedWebResource getCachedWebResource(InputStream file, String name, WDWebResourceType type)
     IWDCachedWebResource cachedWebResource = null;
     if (file != null)
          cachedWebResource = WDWebResource.getWebResource(file, type);     
          cachedWebResource.setResourceName(name);               
     return cachedWebResource;
When I try to download the data to excel I am getting the following error:
you must flush before accessing the resource content
But when I deploy the application using NWDS2004s it works perfectly.
Can anyone shed some light on why this may be happening? Am I missing something? Has it got anything to do with the NWDS version?
Thanks and Regards,
Saurabh

Answer 1

Hi Saurabh,
      The above code is deprecated :-
Replace that with this piece of code -->
File f = new File(fileName);
WritableWorkbook workbook = Workbook.createWorkbook(f);
FileInputStream excelCSVFile = new FileInputStream(f);
IWDResource cachedExcelResource = WDResourceFactory.createCachedResource(excelCSVFile, "FileName.xls", WDWebResourceType.XLS, false);
wdContext.currentContextElement().setResource(cachedExcelResource);
cachedExcelResource.getUrl(WDFileDownloadBehaviour.ALLOW_SAVE.ordinal());
WDFileDownloadBehaviour --> Will determine how you would like to download your file.
Hope this helps !!!
Cheers,
Brian.