Hi Bill
I am not able to iterate through the columns, In the example they have given the index instead of the property names. That index is not which showing up on the screen so we really don't know what index show which column. What is the order of the columns will be when list view is loaded so that i can use the property name to fetch the value in each row of the collection. Also when returning the data after through external values. but in the collection we can have variable rows in that case how we will able to create external value field dynamically.