In order to use the TreeControl-tag on a JSP page, the corresponding tag library must be declared at the start of the page. Then, the Common-Controls can be used with the prefix <ctrl:tagname />. [In addition, the tag libraries must be included in the Deployment descriptor, the WEB-INF/web.xml file]

<%@ taglib uri="/WEB-INF/tlds/cc-controls.tld" prefix="ctrl" %>

<ctrl:tree
    id="prodtree1"
    name="products"
    action="sample201/productBrowse"
    root="true"
    linesAtRoot="true"
    labelProperty="name"
    imageProperty="type"
    expandMode="multiple"
    groupselect="true"
    checkboxes="false"/>

All the necessary steps for using the TreeControl are thus complete. The opening and closing behavior does not have to be self-implemented. It is administered by the control element itself. This also applies to the selection states of checkboxes, which can be activated with the attribute checkboxes="true". The programmer can thus concentrate on the technical sequences and on providing the display data.

Professional Edition: With the attribute runat="client", the tree is generated in a JavaScript version and and can thus be exploded and closed without Server Roundtrips. However, this increase in the user comfort does not need any changes in the application program.

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