On Thu, 29 Aug 2002, Aaron Lindsey wrote:
> Date: Thu, 29 Aug 2002 00:09:28 -0400
> From: Aaron Lindsey <[EMAIL PROTECTED]>
> Reply-To: Struts Users Mailing List <[EMAIL PROTECTED]>,
> [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Subject: Creating a DynaActionForm instance
>
> Hi all,
> I've seen this question asked a couple of times in the archives, but there
> weren't any answers that I could find, so I'm giving it another shot. How
> can I create an instance of DynaActionForm from inside an Action in order to
> prepopulate it with data to be displayed in a jsp form? I tried the
> following:
>
> DynaActionForm myForm = new DynaActionForm();
> myForm.set("firstName", "bob");
>
> A NullPointerException is thrown. Is it possible to do something like this
> with a DynaActionForm? Do I have to go back to the regular ActionForm to
> have the ability to create an instance of an ActionForm, populate it, put it
> on the Request, and forward to a jsp that will then use the form? Thanks.
>
To create a new DynaActionForm instance, you *must* ask for a new instance
from the corresponding DynaActionFormClass. Otherwise, the DynaActionForm
instance will not know what it's valid properties are:
DynaActionFormClass dafc =
DynaActionFormClass.getDynaActionFormClass("formBeanName");
DynaActionForm myForm = dafc.newInstance();
> Aaron
Craig
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