I saw a similar question, but mine is the opposite. I want the user to be able to enter into the combobox
so I have my UltraCombo as DropDown. Here's my problem. I have a BeforeDropDown event inside which I go to the database and load a datatable. Than I bind that datatable to the UltraCombo datasource. As soon as the DropDown Box opens, the current value is blanked out. Even though the current value exists in the list that was loaded. Anyone else having these problems
The Combo should not blank out in DropDown style, even if the item does not exist on the list.
What version are you using?
Can you create a small sample project demonstrating this?
I still see this behavior in Infragistics 10.2. BeforeDropDown sets the DataSource and right after DataSource is set the Value is still preserved. However, sometime later the internal DoDropDown method seems to clear it.
This issue dates back at least a couple of years as evident by this thread and this other thread http://forums.infragistics.com/forums/p/44392/242028.aspx
I've attached a very simple project that demonstrates the bug and the workaround to make it work.
It's been a while since I posted the sample and I haven't heard anything back. Has anyone looked into this issue? Can you confirm whether you are able to reproduce the problem? Can we expect a fix in upcoming releases?
Thanks,
Hi,
I don't think this is a bug. The problem here is that you are setting the Value of the combo before it has a list. In DropDownList style, the combo can never have a value that does not exist on the list, and since your list is empty, the initial value of "a" you are applying in your sample doesn't really stick.
You need to bind the combo to a list before you can set it's value. Or you can use the SetInitialValue method, instead of setting the control's Value property.
//ultraCombo.Value = "a"; ultraCombo.SetInitialValue("a", "a");
Hi Mike, thanks for looking into this. I'm afraid, though, that it is a bug. What you're saying is correct if the combo was, in fact, using DropDownList style. But if you look at the sample, you'll notice that it's specifically set to DropDown style. So the value can be anything.
Hello,
I have logged this as a development issue with an ID# of 96044. I will make another post once this issue has been resolved.
This issue has been resolved in the latest service release as of 1/4/2012. You can download the Service Release from your My Keys & Downloads page: https://es.infragistics.com/Membership/Default.aspx?panel=Downloads#Downloads