ListView DataBound Says Items More 0 When Actually Items Less Than 0

Jul 23, 2010

So I have a ListView (assignmentsListView) in an UpdatePanel, being filtered by a DropDownList in the same UpdatePanel. The DropDownList has a list of persons in it and uses autopostback, and the ListView shows the tasks those persons are assigned to.

I am trying to use code similar to this:

[code]....

When I first load the page, the DropDownList shows the first person in the list, and the ListView correctly shows that persons tasks.

If I then select a person who I know has zero tasks, I get an error at the RegisterPostBackControl() method, saying the passed-in control cannot be null.

When debugging, at the RegisterPostBackControl method, it shows that the ListView Items collection has >0 elements in it (the number of elements matches the person selected before the current person).

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