I have an ajax enabled control which has a Dropdownlist that changes the Textbox when index gets changed. It is working fine if I use an ASPX page that contains the control in design time.
However, when I dynamically add this control to the ASPX in run time, I got an error when the Dropdownlist is triggered:
Javascript error: System.InvalidOperationException: A control with ID 'myDropDownList' could not be found for the trigger in UpdatePanel..etc..
What should I do? Please help..
There's a good chance that if you look at your page source you'll find that the dynamic control does not have a clientside Id of 'myDropDownList'. It'll probably have something more complex like ct100_myDropDownList or something.
Two possible fixes: 1) wire up your javascript on something other than the id (e.g. iterate over getElementsByTagName), or 2) render the control's ClientID inside a script tag on the page like: var ddl = '<%= myDropDownList.ClientID %>'
HOpe that helps.
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