Cast Data Bindings Values Types

Question

I have a Slider control and a TextBlock that shows the value of the Slider via data binding.

The problem is that it displays a float and I'm interested in an integer.

I want to cast the float to an integer so instead of seeing 45.25139664804483 in the TextBlock, I'll just see 45.

Did you try something like int newValue = Convert.ToInt32(floatValue);? — Tim
– Tim, Commented Mar 19, 2013 at 4:42
Yes, Tim is right. Refer - stackoverflow.com/questions/2578348/… — Umesh .A Bhat
– Umesh .A Bhat, Commented Mar 19, 2013 at 4:42
@Tim I did, but the UI didn't know when the value was updated. It started at 0, and after the slider's value changed, the TextBlock's text stayed at 0. — MasterMastic
– MasterMastic, Commented Mar 19, 2013 at 4:42
Ah...that's a different question. You need to update the TextBox contents, probably with an event handler. Post your code and you'll get good answers. Heh - like the ones below that came in while I was typing this comment the first time :) — Tim
– Tim, Commented Mar 19, 2013 at 4:45
Oh, I aim for a solution that involves data-binding. Is this possible? — MasterMastic
– MasterMastic, Commented Mar 19, 2013 at 4:47

sa_ddam213 · Accepted Answer · 2013-03-19 05:27:16Z

3

You can use StringFormat on your TextBlock binding to format away the decimal places

<StackPanel> <TextBlock Text="{Binding Value, ElementName=slider/> <TextBlock Text="{Binding Value, ElementName=slider, StringFormat={}{0:0}}" /> <Slider x:Name="slider" /> </StackPanel>

Result:

enter image description here

answered Mar 19, 2013 at 5:27

sa_ddam213

43.7k7 gold badges106 silver badges112 bronze badges

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

4 Comments

MasterMastic Over a year ago

God I've tried using the StringFormat so many times but couldn't figure out what to write after the colon. Thanks!

sa_ddam213 Over a year ago

yeah, StringFormat in xaml is horrible to use, the trick I have fornd is to start it with {} seems keep intelisense from flipping out ,LOL, oh and anothet trick is if you need to use NewLine or some othet escape char like that use its Hex value e.g: NewLine = 


failedprogramming Over a year ago

@sa_ddam213 SO should have a "Stalk" feature, so I can stalk your answers and learn more lol

sa_ddam213 Over a year ago

@failedprogramming, you can access peoples answers in thier profile, I stalk a lot of people, LOL

Umesh .A Bhat · Accepted Answer · 2013-03-19 04:45:03Z

2

Try this on Slider_ValueChanged

textBox.Value = (int)Math.Ceiling(45.25139664804483);

answered Mar 19, 2013 at 4:45

Umesh .A Bhat

5873 gold badges15 silver badges27 bronze badges

1 Comment

MasterMastic Over a year ago

Isn't there a way to do this with Data Binding?

Dilshod · Accepted Answer · 2013-03-19 04:49:55Z

 private void Slider_ValueChanged_1(object sender, RoutedPropertyChangedEventArgs<double> e) { myTextBlock.Text = Convert.ToInt32(Math.Floor(e.NewValue)); }

Hope this helps. With Binding:

int _myValue; public int MyValue{get{return _myValue;}set{_myValue = value; NotifyPropertyChanged("MyValue");}} private void Slider_ValueChanged_1(object sender, RoutedPropertyChangedEventArgs<double> e) { MyValue = Convert.ToInt32(Math.Floor(e.NewValue)); } public event PropertyChangedEventHandler PropertyChanged; private void NotifyPropertyChanged(String info) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(info)); } }

in this case your class needs to implement INotifyPropertyChanged interface

Bind your TextBlock to MyValue. You may wanna see the INotifyPropertyChanged.

Collectives™ on Stack Overflow

Cast Data Bindings Values Types

3 Answers 3

4 Comments

1 Comment

2 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

4 Comments

1 Comment

2 Comments

Linked

Related