page load after postback - how does it know?

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  • oaksong

    page load after postback - how does it know?

    Looking at the locals I have "ME" and "sender". I've just clicked on a
    dropdownlist and it's fired a post back. I'm in the page_load. I know
    that after the page_load is complete it will fire the click event
    handler for my dropdownlist, which indicates, since I've got several
    of these, that it knows which one fired.

    The question is: How does it know? Is there something in "Me" or
    "sender" that tells it what I clicked on? This seems to me to be a
    fairly rudimentary question, yet I'm not having any luck finding an
    answer via the usual search mechanisms.

    tia
    Chris
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