Need to upload a CSV/Excel to a table in OAF page

Question

I have an updatable products table on a OAF page. I need to provide that table with an 'Upload' button, On clicking, user should be able to browse for the excel/csv(It contain some products) file from local desktop and be able to upload it into products table.
Any idea how this can be done?
Do we need to use messageFileUpload> get DataObject>> convert to StringBuffer>>> and break it into rows >>>>insert each row thru VO >>>>> refresh the VO?
Is that the process or do we have any other process. If so could you please point out to some examples of using messageFileUpload?
Thanks,
Santosh.

Answer 1

public void processFormRequest(OAPageContext pageContext, OAWebBean webBean)
super.processFormRequest(pageContext, webBean);
OAApplicationModule am = (OAApplicationModule) pageContext.getApplicationModule(webBean);
OAViewObjectImpl vo = (OAViewObjectImpl) am.findViewObject("XxCholaCsvDemoVO1");
if ("Go".equals(pageContext.getParameter(EVENT_PARAM)))
DataObject fileUploadData =(DataObject)pageContext.getNamedDataObject("FileUploadItem");
String fileName = null;
String contentType = null;
Long fileSize = null;
Integer fileType = new Integer(6);
BlobDomain uploadedByteStream = null;
BufferedReader in = null;
try
fileName = (String)fileUploadData.selectValue(null, "UPLOAD_FILE_NAME");
contentType =(String)fileUploadData.selectValue(null, "UPLOAD_FILE_MIME_TYPE");
uploadedByteStream = (BlobDomain)fileUploadData.selectValue(null, fileName);
in = new BufferedReader(new InputStreamReader(uploadedByteStream.getBinaryStream()));
fileSize = new Long(uploadedByteStream.getLength());
System.out.println("fileSize"+fileSize);
catch(NullPointerException ex)
throw new OAException("Please Select a File to Upload", OAException.ERROR);
try{
//Open the CSV file for reading
String lineReader="";
long t =0;
String[] linetext;
while (((lineReader = in.readLine()) !=null) ){
//Split the deliminated data and
if (lineReader.trim().length()>0)
System.out.println("lineReader"+lineReader.length());
linetext = lineReader.split(",");
t++;
//Print the current line being
System.out.println(t + " - " +
linetext[0].trim() + " - " + linetext[1].trim() + " - " +
linetext[2].trim() + " - " + linetext[3].trim() + " - " +
linetext[4].trim() + " - " + linetext[5].trim() );
if (!vo.isPreparedForExecution()) {
vo.setMaxFetchSize(0);
vo.executeQuery();
Row row = vo.createRow();
row.setAttribute("Column1", linetext[0].trim());
row.setAttribute("Column2",linetext[1].trim());
row.setAttribute("Column3",linetext[2].trim());
row.setAttribute("Column4", linetext[3].trim());
vo.last();
vo.next();
vo.insertRow(row);
catch (IOException e)
throw new OAException(e.getMessage,OAException.ERROR);
else if ("Upload".equals(pageContext.getParameter(EVENT_PARAM))) {
am.getTransaction().commit();
throw new OAException("Uploaded SuccessFully",OAException.CONFIRMATION);
}