Strange problem of Pdf downloading with Web Dynpro

Question

Hi, experts, I have to setup a project to realize pdf downloading with web dynpro. But unluckily, I have tried all the methods in this froum ,there's really strange problem .Because when I click the link of Download UI link, there's no reaction at all, I really don't know why.Below is the codes I used , can anyone help me ? thank you very much!
public void wdDoInit()
    //@@begin wdDoInit()
          IWDAttributeInfo attInfo =
               wdContext
                    .currentContextElement()
                    .node()
                    .getNodeInfo()
                    .getAttribute(
                    "Pdfsource");
          ISimpleTypeModifiable type = attInfo.getModifiableSimpleType();
          IWDModifiableBinaryType binaryType = (IWDModifiableBinaryType) type;
          binaryType.setFileName("test.pdf");
          binaryType.setMimeType(WDWebResourceType.PDF);
          try {
               int length =
                    (int) wdContext.currentPdfdownloadElement().getBin_Filesize();
               byte b[] = new byte[length];
               b = wdContext.currentPdfdownloadElement().getBin_File();
               wdContext.currentContextElement().setPdfsource(b);
          } catch (Exception ex) {
"Pdfsource" is the context value attribute of type binary.And Bin_File is the xstring type parameter from my RFC contains pdf content.
I used two views and one customer-controller . I put some value in the first view to set search condition.and the second then appears and have the download UI element. Are there any additional codes I should use? pls help!

Answer 1

Hi Hao,
Try this out
Suppose the file name is test.doc in c drive in server
create a context attribute filedata of binary type
bind it to data property
write the following code
try
   File input = new File("C:
test.doc");
   int length =(int)input.length();
   //Create a byte array b to hold the file
   byte b[] = new byte[length];
   FileInputStream in = new FileInputStream(input);
   //Reading the file to a byte array b
   in.read(b);            
   in.close();
   //Setting the data from the byte array to the context element.
   wdContext.currentContextElement().setfiledata(b);
catch(Exception ex)
  wdComponentAPI.getMessageManager().reportSuccess("Error in File 
  IO"+ex.toString());
// Structure information of the context attribute
IWDAttributeInfo attinfo = wdContext.getNodeInfo().getAttribute("filedata");
IWDModifiableBinaryType binaryType = (IWDModifiableBinaryType) attinfo.getModifiableSimpleType();
// Default File name which appears when opened on client machine
binaryType.setFileName("testing.doc");
//Explicitly setting the file type
binaryType.setMimeType(WDWebResourceType.DOC);