Unable to put a listbox index to -1

[vilrbn]

Hello,

I have three listboxes: ListA, listB, listC.
ListC is updated according to listB choice.

If I click on ListA, my SelectedIndex takes a value.

If I click on ListB just after, I want to set listA index to -1:

listA.SelectedIndex = -1

I can check in the watch window that it it set to -1 but... in reality my ListA' SelectedIndex is set to 0 (first item in the list).
So if I action my search clicking on a button, I'm not able to know if ListA or ListB has been selected as the two indexes are different from -1.

Does anybody already have the same problem ? It drives me crazy, help !

 

[bradlkm]

Just use listA.ClearSelection. This should do what you want it to do! (I don't know why you can't manually do it. . . one of the great mysteries of the universe :-D)

HTH Kevin B.
.Net Programmer

 

[vilrbn]

In fact I also have tried ClearSelection method. Like SelectedIndex = -1, It's working, but... my indexes having -1 turned back to 0 when I click on one of my button.
To solve the problem, for each list, I'm inserting a blank record at page loading:

listA.Items.Insert(0, New ListItem("&quot)
...

and I'm testing that SelectedIndex is greater than 0 !

That's bypassing this strange behaviour.