Navigation services not working in WPF

Accepted answer

As seen in the screenshot, you had called the NavigationService class in the constructor of Sale page, as NavigationService class may not initialized in the memory.

Try this event in your Page load event.

Hope this will fix this issue.

Devendra Kumar9y ago

Thank you all.. writing on page load works fine.. thanks

Devendra Kumar9y ago

Pz look at the screenshot

Afzaal Ahmad Zeeshan9y ago

Can you show me the code as well? Also, it gives a null reference exception on what object or line. That would help us understand and help the problem.