I also encountered similar problems. How to solve.

Here's what I've been able to observe:

Removing the updatepanel made no difference, the behavior was the same.  I have 3 combo boxes, the latter two of which are populated according to the selection made in the first one, using the SelectedRowChanged Event in code-behind.  If I select a value in all 3 controls, I can go back and change the selection in the first, which triggers the datasource in controls 2 and 3 to rebind, based on the  new selection.  this works fine.  However, if I don't select an item in the third combobox so that the control appears empty, go back and make a new selection in the first control (which repopulates combos 2 and 3) then combo 2 does not allow me to make a new selection, even though the list contains the new records.  Additionally, the text portion of combo 2 remains populated with the selected value from the old list of records.  One caveat, if the item I want to select in combo 2 has the same index value as the previously selected item, I cannot select the new value...or at least it doesn't display in the textbox portion of the control.  If I select an item with a different index, the control appears to function normally.

Any insight into what's happening would be greatly appreciated!

Sooo...has anyone discovered how to resolve this issue?  I having the same problem with placing a webcombo inside an updatepanel.  :(

Hello,

I am having a similar problem. I have the WebCombo inside an UpdatePanel and that WebCombo has a SelectedRowChangedEventHandler. I can select an item initially, but can never change that selection. The control won't even respond to the click at all. If I remove the SelectedRowChangedEventHandler, the WebCombo doesn't behave this way (still inside the UpdatePanel). Thanks in advance for your advice on this issue.

 Best,
Amber