Are dynamically loaded controls preserved over a postback?

Hello,

I have a placeholder, which gets a user control added in when the page first loads. This user control contains a dropdownlist, and I would like to get hold of the value of this drop down list form the calling page on postback. Can I do this? If I try and use FindControl on the placeholder, it can't find the dropdownlist.

I tried...

ShowCategory ctlShowCategory = (ShowCategory)plcCategoryDetails.Controls[0];

(where ShowCategory is the user control) but this gave the error...

System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values. Parameter name: index

which sounds like the user control wasn't preserved in the placeholder over the postback.

Any ideas how I do this? Hope this was clear!! TIA

--
Alan Silver
(anything added below this line is nothing to do with me)
.

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