Datalink value of a Tree Browser

Hi,

I have a Tree browser which displays the data in a parent child relationship. My display column list contains "CHILDNAME, PARENTNAME, CHILD_KEY, PARENT_KEY". So when ever a folder is selected and tried to fetch the datalink value, then it fetches the value of the CHILD_KEY.

But I want the value of another column of the query output as the Datalink value.

Query returns the following columns:

CHILDNAME, PARENTNAME, CHILD_KEY, PARENT_KEY, COLVALUE1, COLVALUE2

Now in the display template I mapped the columns as

<Param Name="DisplayColumns" value="CHILDNAME, PARENTNAME, CHILD_KEY, PARENT_KEY">

If I change the above line of code to as shown below:

<Param Name="DisplayColumns" value="CHILDNAME, PARENTNAME, CHILD_KEY, PARENT_KEY, COLVALUE1">

then I dont have a method to fetch the value of the COLVALUE1.

I cannot keep this column name in between the list because it distorts the heirarchy view. But I really need the value of COLVALUE1 on selection of a folder in Tree View browser.

Could any body help!

I am using MII 11.5

Regards,

Rajesh.