You can pass the parameter as you have
done and get the value of the parameter as follows
FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("empID");
From: Rick Reumann
[mailto:[EMAIL PROTECTED]
Sent: Friday, August 26, 2005 2:49
PM
To: MyFaces Discussion
Subject: Dealing with
links/buttons to fire off an action? confusion on how to set this up
I was wondering how to d something that I would think would be a common
situation, yet I'm not finding any examples at the moment...
scenario:... list of employees. You want to be able to click on one of the
employees and go to an "editEmployee" backing bean method that would
retrieve the employee based on the id of the employee in the list.
I'm used to doing this with a simple link John Doe <a
href="" /setUpForEdit?employeeID=4355">Edit</a>
With JSF I'm not so sure about how to do this. My JSF book mentions briefly
about passing in f:param in commandLink but doesn't show how to retrieve this
param.
As a side note I find this very interesting, I was testing by using a DataTable
and providing a commandLink next to each employee for each row...
<h:commandLink value="Edit"
action="">
<f:param name="empID"
value="#{emp.id}"/>
</h:commandLink>
One of the odd/interesting things is that when I cycle through and print out
the Request parameters I noticed that I'm getting a single parameter (assuming
a map) that actually has the Employee info that I'm concerned with (2nd one):
8/26/05 02:28:55 PM DEBUG net.reumann.Employee editAction - param =
[EMAIL PROTECTED]
08/26/05 02:28:55 PM DEBUG net.reumann.Employee editAction - param = id:
3, name: Rachel, age: 26
08/26/05 02:28:55 PM DEBUG net.reumann.Employee editAction - param =
/employees.jsp
That second enry *does* correspond to the button I clicked but not sure how I'm
supposed to get a handle to the id (actually I'm not even sure how the heck
that got into the request based on the commandLink I set up)?
Also the f:param "empID" is *not* seen as a request parameter when I
loop over them.
What is the typical procedure for providing a link or button to click on that
isn't part of a form but should fire off an action method that will look up
something based on parameter(s) ?
|
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