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Explain routed events in WPF (C# WPF interview questions with answers)?

By : Shiv Prasad Koirala | Jan 21st, 2014 | Views : 3364 | Comments : 0 Bookmark and Share

This question needs understand of WPF visual tree and logical tree, so please first read about the same from http://dotnetinterviewquestion.wordpress.com/2013/11/22/explain-the-difference-between-visual-and-logical-tree-in-wpf-wpf-interview-questions-with-answers/ and then read the below answer.


Routed events are those events which travel up or down the visual tree hierarchy. WPF events can be classified in to 3 types:-


Direct events: - Event is raised at the source and handled at the source itself.


Bubbling events: - They travel up the visual tree hierarchy. For example "MouseDown" is a bubbling event.


Tunneling events: - These events travel down the visual tree hierarchy. "PreviewKeyDown" is a tunneling event.



Also we would request you to go through the below WPF Questions and Answers videos created by www.questpond.com so that you can quickly prepare for WPF interviews. To see these videos please visit www.questpond.com


Lab 1: - What is WPF and how it is better than Winforms?Theory: - Explain WPF object hierarchy?

Lab 2 :- How to implement threading in WPF?

Lab 3:- Explain one way, two way, one time & one way to source bindings?

Lab 4 :- Explain UpdateSourceTrigger in WPF ?

Lab 5 :- Explain WPF Resources ?

Lab 6 :- What are WPF Value Converters ?

Lab 7 :- Explain WPF multibindings and multivalueconverters ?

Lab 8 :- Explain Visual tree , logical tree and routed events in WPF ?


video explain what is WPF and how they differ from Windows form


 
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