Can't get value from Model Binding.....

Question

Hi.
I create a BO name Document in CAF.
with is structure:
name     String
type       String
content   BASE64BINARY
After that
1.I create a Application Services name DocumentAS.
2.create a Operation name createDocument with a input paramter name doc which Type is Document i created.Implement  it.
3.In WD,I create a model for the DocumentAS.
4.In Component controller 's context,create Model bind.
   structure like this:
   Context
Requet_createDocument(Node)
Document(Node)
Content(Node)
item(byte)
name(String)
type(String)
5.init model with code:
DocumentModel documentModel = new DocumentModel();
Document document = new Document(documentModel);
Request_createDocument request_createDocument = new Request_createDocument(documentModel);
wdContext.nodeRequest_createDocument().bind(request_createDocument);
wdContext.currentRequest_createDocumentElement().modelObject().setDocument(document);
6.in excute method
wdContext.currentRequest_createDocumentElement().modelObject().getDocument().setName(fileName);
wdContext.currentRequest_createDocumentElement().modelObject().getDocument().setType(fileType);     
for (int i = 0; i < content.length; i++) {
    wdContext.nodeContent().createAndAddContentElement().setItem(content<i>);
wdContext.currentRequest_createDocumentElement().modelObject().execute();
I run app with debug mode, In the DocumentAS 's createDocument Operation.
I found the input paramter of document's property "content" is null.But the other property is not null....
Is some problem in my init code or excute code?
Please help me!

Answer 1

Well, you can easily check all the entries in your map with
Object key;
for (Iterator it = map.keySet().iterator(); it.hasNext();) {
  key = it.next();
  System.out.println(key + " : " + map.get(key));
}