This sounds like you're using a ValueList.  A ValueList doesn't exist as a standalone control, so there's no function similar to igcmbo_getComboById() to get a reference to it.  Additionally, a ValueList does not have selectWhere() functionality or any other kind of filtering capabilities.

You'll need to use WebCombo if you want to use selectWhere functionality.

What I am trying to achieve is simple: I need 2 columns with webcombos, where the second combo gets filtered according to the value in the first. I thought this should be easy, and implemented a similar solution to what's done in the sample "Dynamically Populated WebCombo" : https://es.infragistics.com/samples/aspnet/data-grid/dropdown-editors

To be able to use clientside selectWhere method on the combo, I think "EnableXmlHTTP" must be set to true. Problem is that EnableXmlHTTP=True seems to have a flaw: On som of the rows it makes the cell show only the DataValueField, on others it correctly shows the DataTextField.

If I change to EnableXmlHTTP=False then each cell in the column correctly shows DataTextField. But the selectWhere does not work.

I have doublechecked the datatypes, from SQL they are Int for DataValueField and String for DataTextField, and I have used "System.Int32" as the ultragridcolumns datatype.

Any clues? Is this a known bug or am I doing something wrong. Do you know any real-life examples out there? (The adjustablecombo sample is not a good one because it does not show the grid with multiple rows. I suspect multiple rows in that example would have the same problem I'm experiencing)

https://es.infragistics.com/samples/aspnet/data-grid/dropdown-editors

Select Grid -> WebCombo -> Dynamically Populated WebCombo