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Accessing CORO Elements

Iam using grid v1.6 and i have a coro defined in my grid as follows:

<column width="100" id="tableName" type="coro" align="center" sort="str">Name
<option value="9">John</option>
<option value="11">Sam</option>
<option value="12">Smith</option>
<option value="15"> Cody</option>
<option value="14">Tony</option>
</column>

Now when the user selects a name from the coro i dont want the name to be availiable again to the user. For example if i select the name "John" in the first row. I dont want John to be availiable as an option in the second row. How can I achieve this?

Next code can be used to delete option from select's collection

mygrid.getCombo(index).remove(14);

http://dhtmlx.com/docs/products/dhtmlxGrid/doc/articles/Selectbox_collections.html#grid_art_selectbox

In your case it has sense to place such code in onEditCell handler, stage 2 of which generated when value selected and receives new value of cell.