File upload....How to find the user entered any file or not

Hi Team,
I am working on with file upload UI.
Some times without clicking on browse button, I mean without entering any file they are cliking on upload button, which is giving the exception.
I know there is no action for UI element, Then how to resolve this?
I just control the user, not to press the upload button without entering any file name there?
How to resolve this?
regards,
Bala

Hi,
This code will solve ur problem.
public void onActionUploadFile(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    //@@begin onActionUploadFile(ServerEvent)
    IWDAttributeInfo attributeInfo = wdContext.getNodeInfo().getAttribute(IPrivateFileUploadDownloadView.IContextElement.FILE_RESOURCE);
    IWDModifiableBinaryType binaryType = (IWDModifiableBinaryType)attributeInfo.getModifiableSimpleType();
    IPrivateFileUploadDownloadView.IContextElement element = wdContext.currentContextElement();
    if(element.getFileResource() !=null)
         try
              String mimeType = binaryType.getMimeType().toString();
              byte[] file = element.getFileResource();
              //element.s
              wdComponentAPI.getMessageManager().reportMessage(IMessageFileUploadDownloadComp.SF__UPLOAD,new Object[] {binaryType.getFileName()},false);
         catch(Exception e)
              throw new WDRuntimeException(e);
    else
          wdComponentAPI.getMessageManager().reportMessage(IMessageFileUploadDownloadComp.NO__FILE,new Object[] {" "},true);
    //@@end
Here "fileresource" is context attribute name
Regards,
Sunaina Reddy T

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