Upload/Download UI elements

Question

Hi
Does anybody know if there's any documentation on upload/download applications.
i saw a general UI tutorial but it explained only how to design the iView and didn't explain the code behind.

Answer 1

Hi
A brief but apt description on using FileDownload UI element is given below.
Insert the File Download UI element into the View.
The File Download UI element has various properties out of which only the data property is bindable and mandatory.
Bind this property to a context attribute of type binary.(Lets call the attribute filedata)
The file to be downloaded will be stored in this attribute.
The File Download element will be active only if there is data in the above attribute.
We have to write the file to be downloaded to the attribute.
Lets now look into the coding part how this can be achieved.
Consider that you have created a value attribute “filedata” of type binary in the context of the view. Also consider that the name of the file in server is “test.doc”.At this moment the attribute does not have any data.
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);
Kindly revert back if you find this useful. I can help you with the FileUpload functionality too.
Thanks and regards
Leena