How to export the table data to the excel?

Question

Hi,
I'm new to WebDynpro. im having a table 5rows and 6 columns, i need the data in the table to be exported to excel sheet by clicking on a button.
As i went through some of the blogs and tutorials i couldn't understand the procedure, so could any one help out with detailed procedure.
Thanks & Regards,
  Suresh

Answer 1

HI! Suresh,
  This is a littile bit complicated process.Here i am trying to expalin the procedure,
if you are having any problem then let me know.
Following are the steps:--
1.create two controls one of type linkToAction and other of type FileDownload and a location on your portal server say it's "/server0/temp/webdynpro/web/local/testexcel.xls"
2.create a method in your view or controller and call this method as downLoadToXls()
3.create a Value attribute of type binary in your context,say it's dataContent.
4.Bind your linkToAction Control to the method downLoadToXls() and control   FileDownLoad data property to dataContent.
5.In the init() Hook methos write the following code:--
IWDAttributeInfo attInfo = wdContext.getNodeInfo().getAttribute("dataContent");
IWDModifiableBinaryType binaryType = (IWDModifiableBinaryType)  attInfo.getModifiableSimpleType();
// In addition the FileDownload UI element needs for defined resource types
binaryType.setFileName("testexcel.xls");
binaryType.setMimeType(WDWebResourceType.XLS);
6.in DownLoadToXls() method add the following code:--
try {
        out = new FileOutputStream(path);
       workBook = new HSSFWorkbook();
      hsSheet = workBook.createSheet("UserID");
     cs = workBook.createCellStyle();
     cs1 = workBook.createCellStyle();
     cs2 = workBook.createCellStyle();
     dataFormat = workBook.createDataFormat();
     f = workBook.createFont();
     f1 = workBook.createFont();
     f.setFontHeightInPoints((short) 12);
    //make it blue
     f.setColor( (short)HSSFFont.COLOR_NORMAL );
     //make it bold
    //arial is the default font
    f.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
    //set font 2 to 10 point type
    f1.setFontHeightInPoints((short) 10);
    //make it red
    f1.setColor( (short)HSSFFont.COLOR_RED);
    //make it bold
    f1.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
    f1.setStrikeout(false);
   cs.setFont(f);
   cs.setDataFormat(dataFormat.getFormat("#,##0.0"));
   //set a thick border
   cs2.setBorderBottom(cs2.BORDER_THICK);
   //fill w fg fill color
   cs2.setFillPattern((short) HSSFCellStyle.SOLID_FOREGROUND);
   cs2.setFillBackgroundColor((short)HSSFCellStyle.SOLID_FOREGROUND);
   //set the cell format to text see HSSFDataFormat for a full list
   cs2.setDataFormat(HSSFDataFormat.getBuiltinFormat("text"));
   cs2.setFont(f1);
   cs2.setLocked(true);
    cs2.setWrapText(true);
    hsSheet.createFreezePane(0,1,1,1);
    row = hsSheet.createRow(0);
     cell = row.createCell((short)0 ,0);
      cell.setCellValue("User ID");
      cell.setCellStyle(cs2);
      cell = row.createCell((short)1 ,1);
      cell.setCellValue("Last Changed Password Date");
      cell.setCellStyle(cs2);
    int nodeSize = wdContext.nodeUserIDAndPass().size();
    for(int jCount=0; jCount < nodeSize; jCount++) {
     row = hsSheet.createRow(jCount+1);
       for(int count = 0; count < 2; count++) {
      if(count == 0) {
     cell = row.createCell((short)0,count);               
cell.setCellValue(wdContext.nodeUserIDAndPass().getUserIDAndPassElementAt(jCount).getCtx_UserID());
      if(count == 1) {
        cell = row.createCell((short)1,count);
  cell.setCellValue(wdContext.nodeUserIDAndPass().getUserIDAndPassElementAt(jCount).getCtx_ChangedPasswd());
      cell.setCellStyle(cs2);                            
                                                           workBook.write(out);
out.close();
//Read the file that was created.
        FileInputStream fin = new FileInputStream(path);
        byte b[] = new byte[fin.available()];
       fin.read(b,0,b.length);
       fin.close();
        wdContext.currentContextElement().setDataContent(b);
  }catch(Exception e)     {
  wdComponentAPI.getComponent().getMessageManager().reportException("Exception while reading file "+e,true);                   }
7. Add the follwoing constant at the end:--
private FileOutputStream out = null;
     private HSSFWorkbook workBook = null;
     private HSSFSheet hsSheet = null;
     private HSSFRow row = null;
     private HSSFCell cell = null;
     private HSSFCellStyle cs = null;
     private HSSFCellStyle cs1 = null;
     private HSSFCellStyle cs2 = null;
     private HSSFDataFormat dataFormat = null;
     private HSSFFont f = null;
     private HSSFFont f1 = null;
     private String path = "/server0/temp/webdynpro/web/local/testexcel.xls";
8.Add the follwowing jars in your classPath.
1)poi-3.0.1-FINAL-20070705.jar
2)jxls.jar
regards,
Mithileshwar