Hello Norbert, 

Did you refresh the invisible combobox after changing the visible property? Try to use the ajax refresh widget. It will do the trick.

Yes, I used ajax refresh but my problem is that I don't know what I should check and compare. I mean I don't know what should I use as "value" in combobox.value in my example because I can't find sth like combobox.value when I set condition for "if" there are only Id, SpecialListValue, Valid, ValidationMessage. I tried combobox.speciallistvalue = "first" but it didn't work

Ok, here is an example OML. Hope it helps. 

Choose the admin to show combo2. (I assume you have "Users" espace with sample data)

The selected value is assigned to the combo variable. You have to set the combo's variable to a local variable (or an attribute of an entity if the combo is in an EditRecord) in the combo properties.

Feel free to ask any questions. 

I changed your OML file. It would be nice if you'll change this file to show combobox2(selected "first" in combobox1)/combobox3(selected "second" in combobox1) depend on which variable will be selected in combobox1

Here you go.

You have to create a "dummy" structure for the combobox. 

Hope it helps.

Feel free to ask any questions.

I believe Norbert may have been thinking of a slightly different scenario: select from a single combo either "first" or "second" and have a different child-combobox appear. Am I correct?

In this case, if you want the edit-mode screen to better "show" that combo's 2 & 3 are mutually exclusive while in runtime, would be to place these "child" comboboxes into the TRUE and FALSE parts of an IF to which you specify a name (like "ComboSelectorIF").

Then, on the onChange as André exemplified, you would set a single Boolean var (the one that is used by the IF) and refresh the "ComboSelectorIF". This will make one of the child-combos appear and the other disappear.

Let me know if this helped,

Miguel

André!

Thanks for your help, "OML" is very useful and it works like I want!

No problem Norbert!

I'm glad you accomplished what you wanted! 

Cya around!

I have problem connected to the previous so I decided put it here. In eSpace which I uploaded I want generate XML file ( I know that exist XML records but I want do it in my own way) from user input but I can't get value of current selected combobox. My problem is in "Createconfig" action in "router" assign. Anyone can help me with generete output with included router name?

PS. Miquel I just saw your post, yes you are right but I Andre's example explained me how it works and I used it without difficulties for my problem.

Andre you are my hero :)
Thanks again for help

No Problem!

Cya around