gridview not refreshing after update on datafilter

[cielo valdoz]

Hi,

The itemSource of my gridview is bound on a raddatafilter but i'm defining the filter descriptors on code behind. but after adding filters to search, the gridview is not refreshing unless I scrolldown the gridview or set the focus to any control or click somewhere on it.

I'm using a MVVM to bind the item source and used observableCollection with mode=twoway to reflect the changes but it's not working.

Any idea?

Thanks