File Upload UI not Working

Question

Hi all,
I am using File Upload UI for one my application, for that i created a context attribute of type
com.sap.ide.webdynpro.uielementdefinitions.Resource
, i placed one button which has the action whether any file was selected or not.
public void onActionuploadSelectedFile(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    if(wdContext.currentContextElement().getCaResource()!=null)
         wdComponentAPI.getMessageManager().reportSuccess("File Selected");
    else
          wdComponentAPI.getMessageManager().reportSuccess("File not Selected");
i am getting the message 
File not Selected
when no file was seleted. But when i select a file i am not getting any message.
Kindly help me and let me know where is the actual problem....
Currently I am using NWDS 7.0.11
Thanks & Regards,
Chandran S

Answer 1

Hi,
Please carefully check the below properties(cardinality, selection && types) and bindings.
1. Create a value node(Ex: ctx_vn_FileData) of cardinality 0..1 and selection 0...1
2. Create a context attribute(Ex: ctx_va_FileResource) of 
    type "com.sap.ide.webdynpro.uielementdefinitions.Resource" under this node.
3. Check you binded this context attribute to resource property of FileUpload UI element.
4. Now you can get the value of this resource using below code.
IPrivateUploadFileKM_View.ICtx_vn_FileDataElement element = wdContext.currentCtx_vn_FileDataElement();
IWDResource resource = element.getCtx_va_FileResource();
4. You can get the resource(file) name & resource(file) extension using below code.
//Read the File
InputStream stream = resource.read(true);
String resourceName = resource.getResourceName();
String resourceExtn = resource.getResourceType().getFileExtension();
Check that you did all these as it is??
Regards,
Charan