Universal Windows App cannot set slider value

Question

SOLVED

Actually, I solved the problem by removing the "Value_Changed" event from the XAML and adding it manually with C# AFTER setting the value of the slider. Otherwise it looks like the slider take the minimum value possible - Thanks to all

I have two page, one page have a slider which have to takes the value of a variable from the first page.

Main.xaml.cs

public static int val;
...//Some stuff here

val = Converti.ToInt32(roamingSetting.Value["Setting"]);
...//Some stuff there

Then the second page

Second.xaml.cs

public Settings()
{
    this.InitializeComponent();
    slider.Value = Main.val;    //looks like this line does not do his job  
}
private void slider_ValueChanged(object s, RangeBaseValueChangedEventArgs e)
{
    writeToRoaming(slider.Value.Tostring());
}

Slider XAML

<Slider x:Name="slider" Minimum="5" Maximum="100" IsThumbToolTipEnabled="True" ValueChanged="slider_ValueChanged"/>

The fact is that the value of the slider is never set to the value of the setting

Are you settings slider value before in the roaming settings? — Haseeb Asif, Oct 31 '15 at 14:19
Done In fact, it looks like "val" is changed by slider_valuchanged() Event — Sven Borden, Oct 31 '15 at 16:03
why are you reading roaming settings in mainpage, we can do the same in settings constructor — Haseeb Asif, Oct 31 '15 at 16:52
Well, actually, I moved the roaming settings read in another class, but it doesn't change anything I think — Sven Borden, Oct 31 '15 at 22:10
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/93919/discussion-between-haseeb-asif-and-sven-borden). — Haseeb Asif, Nov 01 '15 at 17:35
@HaseebAsif Thanks for your support, I was finally able to fix this, gonna push a edit tomorrow to explains — Sven Borden, Nov 01 '15 at 21:55

score 0 · Answer 1 · answered Oct 31 '15 at 15:15

It might be some issue with biding of slider with your val variable. But we you can get the new value from events args in slide value change event. It will write the latest values into the roaming settings and fix the problem.

private void slider_ValueChanged(object s, RangeBaseValueChangedEventArgs e)
{
    writeToRoaming(e.NewValue.ToString());
}

score 0 · Answer 2 · answered Nov 02 '15 at 00:59

0

I've recreated your scenario and it works for me but think you could be seeing one of the following:

there is no roaming settings value
the roaming settings value that is being used is outside the maximum and minimum values that you've defined for the slider

answered Nov 02 '15 at 00:59

Matt Lacey

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Thanks, I was able to solve it by changing the declaration of the event function – Sven Borden Nov 02 '15 at 08:31

Universal Windows App cannot set slider value

2 Answers2