Need to make WPF application keyboard navigable

Question

Hi All,

 

I am working on a WPF application. A couple of combo-boxes and few buttons.

 

Problem statement - Not able to make application keyboard navigable. Default tab order is not working. Even after mentioning tabindexes, application is not responding to navigation keys such as tab, and arrow keys to select combo-box items .

 

Application page is used

 

(MahApps.Metro) is used in UI. Can it be the reason tab not working.

 

Any suggestions will be helpful. Thanks in advance.

 

Regards,

Ankush