Using .NET 4.5, I have a set of controls contained within UpdatePanel. One of these controls is a dropdown that does partial page postback.
If I enter this form and exit the submit button from the update panel and then select an item in the drop down within UpdatePanel, I get a JS error from ScriptResource.axd I am receiving
Sys> ArgumentTypeExceltion: object type object can not be converted to type string. Parameter name value
The server side postback event is not removed on the drop down
this In condition, this was due to the form containing the hidden field with the "Action" ID
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