How to set foreground color of ListBox item

I have a ListBox in a WP7 app page which I bind to a collection (List) of a custom object called Location. In that object is a field called WMO and what I want to do when the ListBox loads is set the foregound color of whatever bound listbox item has that same value as my default value... but I just can't seem to get this working and nothing I've read or googled has helped.

I know the items in the list are bound to the datasource but I want to get to the physical representation of that item and change the foreground colour.... just can't work out how I do that so if anyone can help I'd appreciate it.

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="0,0,0,0" >
    <ScrollViewer Height="615"  HorizontalAlignment="Left" Margin="5,5,5,5" Name="scrollViewer1" VerticalAlignment="Top">
        <ListBox Name="lbxSavedLocs" Height="615" FontSize="22" HorizontalAlignment="Left" VerticalAlignment="Top" Width="470" SelectionChanged="lbxSavedLocs_SelectionChanged" Loaded="lbxSavedLocs_Loaded">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Width="380" Text="{Binding SiteName}" HorizontalAlignment="Left" />
                        <TextBlock Width="90" Text="{Binding WMO}" HorizontalAlignment="Center" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </ScrollViewer>
</Grid>

private void lbxSavedLocs_Loaded(object sender, RoutedEventArgs e)
{
    //Populate the listbox from our saved locations.
    lbxSavedLocs.ItemsSource = gl.savedLocs.OrderBy(x => x.SiteName);

    foreach (Locatio开发者_JS百科n itm in lbxSavedLocs.Items)
    {
        if (loc.WMO == gl.defaultWMO)
        {
          //GET AN "INVALID CAST" EXCEPTION HERE:
          ((ListBoxItem)itm).Foreground  = new SolidColorBrush(Color.FromArgb(255, 255, 255, 255));
        }
    }

    //Hopefully this produces a redraw of the ListBox.
    lbxSavedLocs.InvalidateArrange();
}

Try this:

Option1:

 ListBoxItem lbi1 = (ListBoxItem)(listBox.ItemContainerGenerator.ContainerFromIndex(0));
lbi1.Foreground= new SolidColorBrush(Color.FromArgb(100, 45, 23, 45));

Option2:

ListBoxItem lbi2 = (ListBoxItem)(listBox.ItemContainerGenerator.ContainerFromItem(listBox.Items.SelectedItem));

 lbi2.Foreground= new SolidColorBrush(Colors.Red);

If you need to apply the same foreground colour to all items in the ListBox or to bind the foreground colour to a value in the data item, then the best approach is to modify the ItemContainerStyle. The ItemContainerStyle defines the visual wrapper around the contents of the ItemTemplate and by default uses a ContentControl that you can set or bind the Foreground property:

        <Style x:Key="ListBoxItemStyle1" TargetType="ListBoxItem">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderThickness" Value="0"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="Padding" Value="0"/>
            <Setter Property="HorizontalContentAlignment" Value="Left"/>
            <Setter Property="VerticalContentAlignment" Value="Top"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBoxItem">
                        <Border x:Name="LayoutRoot" 
                                BorderBrush="{TemplateBinding BorderBrush}"
                                BorderThickness="{TemplateBinding BorderThickness}" 
                                Background="{TemplateBinding Background}"
                                HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
                                VerticalAlignment="{TemplateBinding VerticalAlignment}">
                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup x:Name="CommonStates">
                                    <VisualState x:Name="Normal"/>
                                    <VisualState x:Name="MouseOver"/>
                                    <VisualState x:Name="Disabled">
                                        <Storyboard>
                                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" 
                                                                           Storyboard.TargetName="LayoutRoot">
                                                <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource TransparentBrush}"/>
                                            </ObjectAnimationUsingKeyFrames>
                                            <DoubleAnimation Duration="0" 
                                                             To=".5"
                                                             Storyboard.TargetProperty="Opacity" 
                                                             Storyboard.TargetName="ContentContainer"/>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                                <VisualStateGroup x:Name="SelectionStates">
                                    <VisualState x:Name="Unselected"/>
                                    <VisualState x:Name="Selected"/>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>
                            <ContentControl x:Name="ContentContainer"
                                            ContentTemplate="{TemplateBinding ContentTemplate}"
                                            Content="{TemplateBinding Content}"
                                            Foreground="#FFFF0000" 
                                            HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                            Margin="{TemplateBinding Padding}"
                                            VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}" Background="Black"/>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

Here is a way....i think it works

The property you want to bind is Foreground, so

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="0,0,0,0" >
    <ScrollViewer Height="615" HorizontalAlignment="Left" Margin="5,5,5,5" Name="scrollViewer1" VerticalAlignment="Top">
        <ListBox Name="lbxSavedLocs" Height="615" FontSize="22" HorizontalAlignment="Left" VerticalAlignment="Top" Width="470" SelectionChanged="lbxSavedLocs_SelectionChanged" Loaded="lbxSavedLocs_Loaded">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Width="380" Text="{Binding SiteName}" Foreground="{binding forgroundColor}" HorizontalAlignment="Left" />
                        <TextBlock Width="90" Text="{Binding WMO}" Foreground="{binding forgroundColor}" HorizontalAlignment="Center" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </ScrollViewer>
</Grid>

In the program put up the apt condition where you populate your listbox to choose the right Forground using foregroundColor

Populate the list box using a class containin

class lisboxItem
{
    public string SiteName{get;set;}
    public string forgroundColor{get;set;}
    public string WMO{get;set;}
}

create a List<listboxItem> items=new List<listboxItem>();

and fill the list items in a loop where u give the condition you want.

after that call lbxSavedLocs.ItemSource=items