I wanted to use multi column combo and give user a possibility to narrow down column lists.
I set "RowSelectors" property as in UltraGrid, that is :
combo.DisplayLayout.Override.RowSelectors = DefaultableBoolean.True
and
combo.DisplayLayout.Override.RowSelectorHeaderStyle = RowSelectorHeaderStyle.ColumnChooserButton
Guess what ... it does not work ... there is no row selector on the combo at all.
Any suggestions?
Hi,
RowSelectors are not supported on the UltraCombo. Clicking on a row selects it, so they aren't really needed.
We could, in theory, support them. But supporting the ColumnChooser would be an entirely different matter. It would be very unusual to show a dialog from a dropdown list - not to mention very difficult, since most dropdowns close when the lose the focus.
However, you could implement your own dropdown by using an UltraTextEditor with an UltraGrid control on a DropDownEditorButton. There are a bunch of posts here on the forums which describe this technique, such as this one:
UltraComboEditor - Can I Use a Custom Control for the DropDown? - Infragistics Community
Hmmm ... how about throwing "Not Implemented" exceptions from not implemented methods?
It seems to be a twisted logic to expose public methods on a object and then claim that implementing them would be unusual ...
The correct exception to throw in a case like this would be a NotSupportedException (as opposed to NotImplementedException) but I see what you mean. To be honest, I'm not sure off the top of my head why we don't do this. I will look into it and see what I can find out.