[WP8.1][Xaml]Update ListView items when other items are selected

Question

hi,
i am developing an app for windows phone and using listview to list items. i am using custom template for the listview item. this custom template contains labels, image and button.
i trying to update the other listview items while one item is selected or multiple item selected. to change listview item i am iterating over the listview and try to get custom template using visual tree helper class. using helper class i am able to retrieve
control from custom template. once i changing the image in listview if i scroll the listview vertically image changed to its default state.
is it possible to change the custom template values using visual tree helper class or do i need to do some other changes in my code.
please suggest.
<ListView x:Name="lst" Grid.Row="2" SelectionMode="Single" SelectedItem="{Binding ListBoxSelectedItem}"
ItemsSource="{Binding TssVariableInfo}" Padding="0" Margin="0"
HorizontalAlignment="Stretch" Grid.Column="0" Grid.ColumnSpan="2" ReorderMode="Disabled" AllowDrop="False"
VerticalAlignment="Stretch" Holding="lst_Holding" >
<ListView.ItemTemplate>
<DataTemplate>
<local:VariableTemplateSelectorClass Content="{Binding}" FontFamily="Segoe UI" >
<local:VariableTemplateSelectorClass.IsLiteAndNonDuplicate >
<DataTemplate>
<Border BorderThickness="0,1,0,1" BorderBrush="DarkGray" x:Name="bordername">
<Grid Margin="0,0,0,0" Tapped="Grid_Tap" x:Name="GridVarDetail" Background="#E8E8E8" Holding="Grid_Hold" HorizontalAlignment="Stretch" Width="{Binding ElementName=lst, Path=ActualWidth}">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="16"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="6*" />
<ColumnDefinition Width="4*" />
</Grid.ColumnDefinitions>
<Image x:Name="imgLegend" Source="/Assets/Images/Legends/00-Blank.png" Width="13" Height="13" Grid.Row="0" Margin="0,0,0,0" HorizontalAlignment="Left" VerticalAlignment="Center"></Image>
<TextBlock Foreground="Green" Margin="14,0,0,0" Grid.Row="0" FlowDirection="LeftToRight" x:Name="lblCustomerGivenName" Grid.Column="0" TextWrapping="NoWrap" TextTrimming="WordEllipsis"
Text="{Binding VariableCustomerGivenName }" FontWeight="Normal" HorizontalAlignment="Left" FontFamily="Calibri" VerticalAlignment="Bottom" FontSize="16" />
<TextBlock Foreground="Green" Margin="14,0,0,0" Grid.Row="1" VerticalAlignment="Top" Width="Auto" x:Name="lblStandardName" Grid.Column="0" TextWrapping="NoWrap" TextTrimming="WordEllipsis"
Text="{Binding VariableStandarName}" FontWeight="Normal" HorizontalAlignment="Left" FontFamily="Calibri" FontSize="16" />
<TextBlock Foreground="Gray" Margin="14,0,0,0" Grid.Row="2" VerticalAlignment="Top" Width="Auto" x:Name="lblSection" Grid.Column="0" TextWrapping="NoWrap" TextTrimming="WordEllipsis"
Text="{Binding SectionName }" FontWeight="Normal" HorizontalAlignment="Left" FontFamily="Calibri" FontSize="16" />
<TextBlock Margin="321,0,40,0" Foreground="Red" Grid.Row="0" VerticalAlignment="Bottom" Width="Auto" x:Name="lblValue" Grid.Column="1" TextWrapping="NoWrap"
Text="{Binding Value}" FontWeight="Normal" HorizontalAlignment="Right" FlowDirection="RightToLeft" FontFamily="Calibri" FontSize="16" />
<TextBlock Foreground="Gray" Margin="321,0,40,0" Grid.Row="1" VerticalAlignment="Top" Width="Auto" x:Name="lblLastDate" Grid.Column="1" TextWrapping="NoWrap"
Text="{Binding LastDate}" FontWeight="Normal" HorizontalAlignment="Right" FlowDirection="RightToLeft" FontFamily="Calibri" FontSize="16" />
<Image Source="/Assets/Images/LeftArrow.png" Height="50" Width="40" Grid.Row="0" Grid.Column="1" Grid.RowSpan="3" HorizontalAlignment="Right" Visibility="Collapsed" x:Name="imgLeftArrow" Tapped="btnMore_Tap" />
<Image Source="/Assets/Images/2Y-OFF.png" Height="50" Width="40" Grid.Row="0" Grid.Column="1" Grid.RowSpan="3" HorizontalAlignment="Right" Visibility="Collapsed" x:Name="btn2Y" Tapped="btn2Y_Tap"/>
<Image Source="/Assets/Images/CP-Off.png" Height="50" Width="40" Grid.Row="0" Grid.Column="1" Grid.RowSpan="3" HorizontalAlignment="Right" Visibility="Collapsed" x:Name="btnTL" Tapped="btnTL_Tap" />
</Grid>
</Border>
</DataTemplate>
</local:VariableTemplateSelectorClass.IsLiteAndNonDuplicate>
</local:VariableTemplateSelectorClass>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
private void Grid_Hold(object sender, HoldingRoutedEventArgs e)
if (e.HoldingState != Windows.UI.Input.HoldingState.Started)
return;
Image imgPlotImage;
Grid GridVar = (Grid)sender;
imgPlotImage = (Image)GridVar.FindName("imgLegend");
General.VariableArrayYAxis.Add(dataObject.VariableID);
General.DictSelectedVariableType.Add(dataObject.VariableID.ToString(), dataObject.IsTSSLite.ToString());
GridVar.Background = new SolidColorBrush(Color.FromArgb(100, 255, 255, 255));
Image imgLeftArrow = (Image)GridVar.FindName("imgLeftArrow");
imgLeftArrow.Visibility = Windows.UI.Xaml.Visibility.Visible;

Answer 1

That link is my signature not that i have provided it for reference. 
You already have implemented binding in your code, just like you have bindings for TextBlock's 'Text' property, likewise you can defined a property for the 'Visibility' of image in the code behind
e.g.
private Visibility imgvisible
public Visibility_ImgVisibility
get { return imgvisible; }
set
if (imgvisible!= value)
NotifyPropertyChanging("_ImgVisibility");
imgvisible= value;
NotifyPropertyChanged("_ImgVisibility");
Then in xaml file, bind this property with the Visibility property of Image and access it as per your requirement (e.g. on tap of an item)
http://developer.nokia.com/community/wiki/Using_Crypto%2B%2B_library_with_Windows_Phone_8