Need suggestion to achieve this functionality

Grid and Tree are alternative ways of representing data in two dimensions. One is a table, the other, well, a tree.

The addition of checkboxes is also superfluous, because a cfgrid or cftree enables you to make a selection.  However, there's nothing stopping you from putting 2 or more trees in a form.

Here is an example I borrowed from the Adobe Livedocs on cftree . The cfdocexamples datasource is pre-installed in Coldfusion, so you can run it directly.

<cfquery name="getCourses" datasource="cfdocexamples">
    SELECT d.dept_name, c.course_id, c.CorName, c.CorLevel, c.corName ||' ( ' ||c.corLevel ||' )' AS corLabel
    FROM CourseList c, Departments d
    WHERE d.Dept_ID = c.Dept_ID
    ORDER BY d.dept_Name, c.corName, c.corLevel
</cfquery>

<cfform name="studentForm" format="flash" width="400" height="450">
    <cfformgroup type="vertical">   
    <cftree name="courseTree1">
        <cfinput type="checkbox" name="chkbx1">
        <cftreeitem 
            query="getCourses" 
            value="dept_name,Course_id" 
            display="dept_name,CorLabel" queryasroot="NO" expand="yes,no">
    </cftree>
    <cftree name="courseTree2">
        <cfinput type="checkbox" name="chkbx2">
        <cftreeitem 
            query="getCourses" 
            value="dept_name,course_id" 
            display="dept_name,corName" queryasroot="NO" expand="yes,no">
    </cftree>    
    </cfformgroup>
</cfform>

I think you're probably pushing beyond the boundaries of what <cfgrid> and <cftree> can do.

From your example you're demonstrating the tree requirement, but you don't explain how this ties into a grid.

For the tree part, you might wanna look @ this: http://www.jstree.com/

I've never used it - I just googled it up - but it might be worth looking at.

--

Adam