JSP, BC4J: EditCurrentRecord DataWebBean

Question

Hi,
I am using the EditCurrentRecord DataWebBean in a JSP program (using BC4J) to create a combo box. The combo box is populated by from a look up table in the
database.
The value selected by the user is to be used in the where clause of a second query whose results will then be displayed. The value that is selected will also be displayed in the
same page.
How can I carry out the above?
I tried to store the value of the item selected in a variable using:
<%= variable_name = request.getAttribute(attributeName)>
However, I got a null value.
Thanks.

Answer 1

Since you are using JDev 3.1 technology, here is how you code a poplist combobox using the EditCurrentRecord Web Bean.
<jsp:useBean id="RowEditor" class="oracle.jbo.html.databeans.EditCurrentRecord" scope="request">
<%
RowEditor.initialize(application, session , request, response, out, "package1_Package1Module.srchItemsView");
RowEditor.useComboBox("CatId", "select id, name from categories", "NAME", "ID" );
RowEditor.render();
%>
</jsp:useBean>
This source code is from the JSP page: ItemsView_insert.jsp from the JDev 3.1 BC4J Auctions sample application.
To get the value from a specific attribute
you can use:
<%= row.getAttribute("AttributeName") %>
Or in scriptlet form:
<% String AttributeValue = row.getAttribute("AttributeName"); %>
(Taken from BidsView_Insert.jsp of the Auctions app. Also make sure you use quotes around the attribute name.. It is also case sensitive..)
With the JDeveloper 3.2 making poplists/HTML selects is a piece of cake with
the new Data Tags technology.
Here is an example pulled from the new 3.2 Online Orders JSP sample app. (search.jsp)
It uses the DataTags RowsetIterate and ShowValue to populate data into an HTML select.
<select name="advcatsel">
<option value="">All Categories</option>
<jbo:RowsetIterate datasource="cat" >
<option value="<jbo:ShowValue datasource="cat" dataitem="Id" />">
<jbo:ShowValue datasource="cat" dataitem="Name" /></option>
</jbo:RowsetIterate>
</select>
Hope this helps..
-Chris