Looking for example to export data from a DynPro table to Excel file

Question

Hello,
I have a certain content in a table.
I would like to export this content to Excel file and let the user save it on his PC. I tried to use the Office Controller but with no success.
Have someone already made something like this and can show me an example?

Answer 1

Hi
I already explained this in another post. Anyway i will cut and paste the same for you.Here you go.Sample way to create a Excel file and then download it to a local pc using a FileUI Download element.
We are developing a generic component for the same requirement which will download data to a excel from any table.
Anyway here is something which will give you some kind of idea as to how you can write the data from WebDynpro to a excel file.
For running this application
Ensure that the requisite JAR files are set for the Excel API's. See the blog link below.
Steps :
All your files in the machine running the WAS will be created in the default location
Alias : webdynpro/resources
Path : <Drive>:/usr/sap/J2E/JC00/j2ee/cluster/server0/temp/webdynpro/web
You can open your Visual Administrator and go to HTTP provider service and then create your own Alias. say
Alias : myAlias
Path : <Drive>:/mydirectory/myfiles
Once this is done restart your WebAS.
The code explained will perform the following.
There is a button UI element and a Download UI element. On click of the Action associated with the button ui element
The code below will create a excel file in the location mentioned.
On click of the download UI element you can view the excel file that was created.
Now create a New project in your NWDS
Follow the blog for importing the necessary jar files for Excel
/people/perumal.kanthan/blog/2005/03/21/reading-excel-data-from-java-using-hssf-api
Once that is done you can create say a button in your Webdynpro and associate it with a action.
Then you can write some code like the one below.
//Declare this in the end between the Begin others block.
  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;
//Code to create the Excel.
  public void onActionExportToExcel(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    //@@begin onActionExportToExcel(ServerEvent)
    try
      out = new FileOutputStream("C:/mydirectory/myfiles/testexcel.xls");
      workBook = new HSSFWorkbook();
      hsSheet = workBook.createSheet("My Sheet");
      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(true);
      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);
     row = hsSheet.createRow(0);
     hsSheet.createFreezePane(0,1,1,1);
    for(int i=1; i<10;i++)
       cell = row.createCell((short)i);
      cell.setCellValue("Excel Column "+i);
      cell.setCellStyle(cs2);
     workBook.write(out);
     out.close();
//Read the file that was created.
     FileInputStream fin = new FileInputStream("C:/mydirectory/myfiles/testexcel.xls");
     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);  
    //@@end
You can now add a Download UI Element to the layout.
Create a Context Attribute say "dataContent" and this should be of Type Binary.
The Data property of the File UI download element should be mapped to dataContent.
In the init method write code like
This is done for the download element.
     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);
Hope that helps you. Anyway its a sample and it should be helpful for you to see how you can modify it and of course maintain some standards in coding unlike the test sample given above :).
Let me know if you require further clarifications
regards
ravi