Data binding: One vs two way [closed]

Question

Closed. This question needs to be more focused. It is not currently accepting answers.

Want to improve this question? Guide the asker to update the question so it focuses on a single, specific problem. Narrowing the question will help others answer the question concisely. You may edit the question if you feel you can improve it yourself. If edited, the question will be reviewed and might be reopened.

Closed 10 years ago.

Improve this question

I don't currently have an example for my question. I would just like to get some insight of the following : When should one use one or two way data binding in XAML ?

Thank you in advance for the time you take to answer this !

Binding.Mode Property. and BindingMode Enumeration In summary: use OneWay if the property is readonly, use TowWay if you want to change it from your view. — Bolu
– Bolu, Commented Jan 6, 2015 at 17:00
Oh gee, that sounds really simple ! Thank you for the insight, you should write an answer and I'll check it as the answer for my query ! @Bolu — Kevin Avignon
– Kevin Avignon, Commented Jan 6, 2015 at 17:03
Assuming you've read about data binding it is very unclear what you are looking for here. Indeed you use one way when you need one way binding and twoway when you need updates both ways... So what exactly you are looking for with this question? — Alexei Levenkov
– Alexei Levenkov, Commented Jan 6, 2015 at 17:06
Currently, I'm in the process of learning my way around XAML/UI/MVVM. I read a bit on the web but was wondering when I should use which or even if I needed to use them while creating a Windows Phone Application — Kevin Avignon
– Kevin Avignon, Commented Jan 6, 2015 at 17:13

Bolu · Accepted Answer · 2015-01-06 17:06:05Z

7

In summary: use OneWay if the property is readonly, use TowWay if you want to change it from your view.

TwoWay updates the target property or the property whenever either the target property or the source property changes.

OneWay updates the target property only when the source property changes.

REF：Binding.Mode Property. and BindingMode Enumeration

answered Jan 6, 2015 at 17:06

Bolu

8,8065 gold badges40 silver badges75 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

lokimidgard · Accepted Answer · 2015-01-06 17:04:14Z

2

Use OneWay if you only want to update the view from your model.

TwoWay also updates the model if you change the view. e.g. a TextBox. So you should use it when you want that your view can affect the model.

MSDN-Page BindingMode

answered Jan 6, 2015 at 17:04

lokimidgard

1,1911 gold badge12 silver badges27 bronze badges

Collectives™ on Stack Overflow

Data binding: One vs two way [closed]

2 Answers 2

Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Related