I have three cascadingdropdowns, which gets populated using a webservice depending on the selection of the other. First the user selects values from the three dropdowns and clicks a button. In this click event I am trying to disable the first two dropdowns and allow the user to select the third dropdown values. But when I do this only the 1st dropdown is disabled and I can't see any values in the third dropdown except the one that I have selected before the click event. I want the users to select different values from the third dropdown and make the first two dropdowns disabled.
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