[CONF] Apache Tapestry > Link Components FAQ

[confluence]

Link Components FAQ Page edited by Howard M. Lewis Ship Changes (2) {scrollbar} h2. Link Components ... A similar technique can be used to add query parmeters to component event URLs (the type generated by the ActionLink or EventLink components), by injecting the ComponentResources, and invoking method {{createEventLink()}}. {scrollbar} Full Content Forms and Form Components  Frequently Asked Questions  _javascript_ FAQ Link Components How do I add query parameters to a PageLink or ActionLink? These components do not have parameters to allow you to specify query parameters for the link; they both allow you to specify a context (one or more values to encode into the request path). However, you can accomplish the same thing with a little code and markup. For example, to create a link to another page and pass a query parameter, you can replace your PageLink component with a standard <a> tag: <a href="" class="code-quote">"${profilePageLink}">Display Profile (w/ full details)</a> In the matching Java class, you can create the Link programmatically: @Inject private PageRenderLinkSource linkSource; public Link getProfilePageLink() { Link link = linkSource.createPageRenderLinkWithContext(DisplayProfile.class, user); link.addParameterValue("detail", true); return link; } ... and in the DisplayProfile page: public class DisplayProfile { void onActivate(@RequestParameter("detail") boolean detail) { . . . } } The @RequestParameter annotation directs Tapestry to extract the query parameter from the request and coerce it to type boolean. You can use any reasonable type for such a parameter (int, long and Date are common). A similar technique can be used to add query parmeters to component event URLs (the type generated by the ActionLink or EventLink components), by injecting the ComponentResources, and invoking method createEventLink(). Forms and Form Components  Frequently Asked Questions  _javascript_ FAQ Change Notification Preferences View Online | View Changes