When app runs combo takes as initial value 1st item on list (Im binding datatatble)
Is there any option to leave it blank - so user need to select ?
(still I do need Limit to list functionality)
The UltraCombo does not automatically select a value, so something in your code must be setting a value initially.
My guess is that you are doing this without realizing it. Perhaps you are binding the Value or Text property, in addition to binding the list.
Im not binding this control
Only thing Im doing is setting: dataSource = dTable DisplayMember and ValueMember
Can this be because of *Member assignements ?
No, to bind the Value or Text property, you would have to be using Bindiings.Add in code or maybe at design-time. You might also want to check to see if you are setting SyncWithCurrencyManager to true. That might cause the combo to "select" the current item in the data source. Other than that, your code would have to be setting the Value or Text property directly. I can't think of any other way the value could be getting set.
Why don't you try putting a breakpoint in the ValueChange and/or TextChange events of the combo and see if it's getting hit, and if so, look at the call stack to see where the set it occurring?
Thanks Mike!
SyncWithCurrencyManager=true
Did that !
Dont know how it was changed because I didnt touch it.
So... what that property does is it keeps the Combo in synch with the current position of the CurrencyManager/BindingManager for the list.
So that means if you select an item from the list and you have some other controls bound to the same data source, they will all update to that position. You typically use that when your combo is being using for navigation - so the user selects a row and then you have a bunch of textboxes and other controls on the form and you want them all to show the data from that row. If you are not using the UltraCombo to navigate your data, then setting SyncWithCurrencyManager to false (or simply NOT setting it to true, since false is the default) is the correct solution.
If you ARE using the UltraCombo for navigation, then the initial behavior you were seeing is correct, because the CurrencyManager is positioning itself to the first row when you bind and I don't think there's any way around that. Although I suppose you could try getting the CurrencyManager and setting it's position to -1 or something. Not sure if they allow that.