[Springframework-developer] Data binding question

[Kopylenko, D. <dko...@ac...>]

Hello everyone. I have a question about the Spring's data binding framework.
Let's say I have a simple bean with the String[] property like

public class ProgramRequest() {
   private String[] programs;
   public void setPrograms(String[] programs)...
   public String[] getPrograms()....
...
}  

And then I have HTML form with elements like this:

<select name="programs" id="programs" tabindex="2" multiple="multiple"
size="6" style="width:99%">
	<option value="1">Program 1</option>
	<option value="2">Program 2</option>
	<option value="3">Program 3</option>
</select>

I'd like to bind these multiple params onto String[] property of the bean
using the Spring's DataBinder:
...
ProgramRequest programRequest = new ProgramRequest();
ServletRequestDataBinder programRequestBinder =
			new ServletRequestDataBinder(programRequest,
"programRequest");
programRequestBinder.bind(request);

...

but it doesn't work (programs property is null after the bind() call).
However, manual binding does work:

programRequest.setPrograms(request.getParameterValues("programs"));


What am I missing?

Thanks,
Dmitriy.