Hi,

Is your question the same as this one ?:

http://forums.infragistics.com/forums/t/27316.aspx

(I assume it's the same). 

What you would like to achieve is not disable the dropdown, but disable the input box inside the control. This is internal to the rendering, and is not publicly exposed. You should not do this, and even if you do, it's not guaranteed that everything will work fine.

I proposed a solution to cancel the ValueChanging client-side event - which will have the same effect, using public APIs. Did you try this?

Thanks for the feedback,

Angel