Hi Thomas LEBRUN,
With the Q3 release we have obsoleted the AddedDescriptors and RemovedDescriptors properties and replaced the with the Added and Removed properties. The new properties are IEnumerable which means that they cannot be modified, i.e. they are for reading purposes only.
With the same release however, we have introduced a new feature called Custom Filtering Controls. With it you can create any
control with any
custom logic and use it for filtering. Here is an example
of two such custom filtering controls.
So in your case you should create a custom filtering control like shown in the examples and use the CaseInsensitiveFilterDescriptor class (from this thread) to add / remove filters to the grid.
By the way, I am currently in the process of writing a step-by-step tutorial on creating custom filtering controls. I will explain the whole process in great detail. The tutorial will also contain a fully-functional sample control along with the source code. Once I am ready with my article I will publish it on my blog
. I hope that it will be available early next week.
the Telerik team