Re: Passing Parameters to Pages (Newbie question)

Hi detlef,

There are a couple of options available.

The first is to use the DirectLink component to generate your action links 
and then in the ActionLink event handler set the parameter on the ItemDetail 
page:

public void itemSelectAction(IRequestCycle cycle) {
   Object[] params = cycle.getServiceParameters();
   Integer itemId = (Integer) params[0];

   ItemDetailPage page = (ItemDetailPage) cycle.getPage("ItemDetail");
   page.setItemId(itemId);
   cycle.setPage(page);
}

The second option is to have your ItemDetail page implement the 
IExternalPage interface and use the ExternalLink component instead of 
DirectLink. You will need to include this type of code in your ItemDetail 
page:

public void activateExternalPage(Object[] params, IRequestCycle cycle) {
  Object[] params = cycle.getServiceParameters();
  setItemId((Integer) params[0]);
}

Regards Malcolm

>From: "detlef schulze" <[email protected]>
>To: "tapestry-developer \(E-mail\)" 
><[email protected]>
>Subject: [Tapestry-developer] Passing Parameters to Pages (Newbie question)
>Date: Fri, 15 Nov 2002 16:56:15 +0100
>
>Hi,
>
>I have a question concerning the passing of parameters to a page:
>
>Imagine two pages: ItemList and ItemDetail. ItemList basically has a 
>foreach that creates some <a> tags using a number of ActionLinks. When one 
>of the Links is clicked a listener method is triggered. This method then 
>shows the ItemDetail using cycle.setPage("ItemDetail").
>
>Now the question: since each link on the ItemList page shall display a 
>different Item (using ItemDetail) I wonder how to pass the parameter (lets 
>say the id (int)) of the Item to be displayed. How do you usually do this 
>with tapestry? I probably just overlook the way to do it because I am not 
>used to the Request cycle that is used with tapestry.
>
>Any hint appreciated
>
>tia
>Detlef


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