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App crasing while trying to get rangSlider.RangeEnd value

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116420 May 22,2014 08:21 AM UTC May 23,2014 10:15 AM UTC WinRT 1
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Tags: SfRangeSlider
Souvick Ghosh
Asked On May 22, 2014 08:21 AM UTC

Hi,
I am trying to implement range slider for windows rt. I have added a range slider with the following in xaml
<editors:SfRangeSlider
                                Visibility="Visible"
                                x:Name="sliderFlash"
                                Height="80"
                                Width="350"
                                VerticalAlignment="Center"
                                Minimum="0"
                                Maximum="100"
                                ShowRange="True" 
                                RangeStart="40"
                                RangeEnd="70"
                                Foreground="#FF46A4DA"
                                ShowCustomLabels="True"
                                LabelPlacement="BottomRight" RangeChanged="sliderValueChanged"/>
And in .cs I am trying to get the range end value with the following code

 private void sliderValueChanged(object sender, Syncfusion.UI.Xaml.Controls.Input.RangeChangedEventArgs e)
        {
           
                System.Diagnostics.Debug.WriteLine("Range Chnaged" + sliderFlash.RangeEnd);
         
           
        }
but every time it gives
A first chance exception of type 'System.NullReferenceException' occurred in Range Slider Test.exe
An exception of type 'System.NullReferenceException' occurred in Range Slider Test.exe but was not handled in user code
Additional information: Object reference not set to an instance of an object.

I have attached the source

Attachment: Range_Slider_Test_57a112b3.zip

Vignesh V [Syncfusion]
Replied On May 23, 2014 10:15 AM UTC

Hi Souvick,

 

We would like to inform that the reported issue occurs, because the control is not loaded initially. SfRangeSlider is loaded after ValueChanged event, that makes the instance empty. We have modified your sample that tries to meet your reuirement of getting RangeEnd value in ValueChanged event.

 

Please find the sample in below link,

Range_Slider_Test.zip

 

Please let us know if you have any queries.

 

Regards,

Vignesh V


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