How to bind object instances created in Actiom script to properties in mxml?

Question

How can we reference an object instance created with ActionScript in mxml?

So let's say I create a function that creates a query task and a query. I want the results of this Query to populate a datagrid that has been created in mxml. If I set the dataProvider of the datagrid to   dataProvider="{querytaskindustry.executeLastResult.attributes}"

in mxml I get a warning saying that the binding will not occur because it can't identify querytask. I believe this happens because I did not set the variable for the querytask to be bindable. However I can't set a variable to be bindable inside a function. If I create the querytask outside the function and set it as bindable it does not work because the function is based on a button click so the query is just created when the user clicks the search button, so I need to create the querytask and query inside the function. What would be the solution for the mxml datagrid dataProvider property identify the querytask? Thank you!

MarkHoyland · Accepted Answer

You can still instantiate the Bindable query task outside of the function. You just set its paramaters when the button is clicked (or when you need to execute the querytask.) This code is an adaptation of the ESRI sample at: http://help.arcgis.com/en/webapi/flex/samples/index.html#/Query_result_in_table/01nq0000005t000000/ I have just commented out the MXML query and query task, and created and used them in actionscript.