How to set the Highlight brush to random color

LexiCodes 1 Reputation point
2020-04-08T22:40:09.633+00:00

I have this code below that sets the color to random, how to set the selected Listbox item to random??

private void button_Click(object sender, RoutedEventArgs e)
{
Brush brush = new SolidColorBrush(Color.FromRgb((byte)r.Next(1, 255),
(byte)r.Next(1, 255), (byte)r.Next(1, 233)));
label1.Background = brush;
}

Windows Presentation Foundation
Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
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  1. Alex Li-MSFT 1,081 Reputation points
    2020-04-09T02:51:30.82+00:00

    Welcome to our Microsoft Q&A platform!

    I made a demo,you can try it:

     <Window.Resources>  
            <Style x:Key="_ListBoxItemStyle" TargetType="ListBoxItem">  
                <Setter Property="Template">  
                    <Setter.Value>  
                        <ControlTemplate TargetType="ListBoxItem">  
                            <Border Name="_Border"  
                                    Padding="2"  
                                    SnapsToDevicePixels="true">  
                                <ContentPresenter />  
                            </Border>  
                            <ControlTemplate.Triggers>  
                                <Trigger Property="IsSelected" Value="true">  
                                    <Setter TargetName="_Border" Property="Background" Value="{Binding Scb}"/>  
                                     
                                </Trigger>  
                            </ControlTemplate.Triggers>  
                        </ControlTemplate>  
                    </Setter.Value>  
                </Setter>  
            </Style>  
        </Window.Resources>  
        <StackPanel>  
            <ListBox SelectionChanged="ListBox1_SelectionChanged" Name="listBox1"  ItemContainerStyle="{DynamicResource _ListBoxItemStyle}" ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Auto">  
                <ListBoxItem>1</ListBoxItem>  
                <ListBoxItem>2</ListBoxItem>  
                <ListBoxItem>3</ListBoxItem>  
             
            </ListBox>  
        </StackPanel>  
    
      public partial class MainWindow : Window  
        {  
            public MainWindow()  
            {  
                InitializeComponent();  
                this.DataContext = new MyViewModel();  
            }  
      
            private void ListBox1_SelectionChanged(object sender, SelectionChangedEventArgs e)  
            {  
                this.DataContext = new MyViewModel();  
            }  
      
        }  
      
        public class MyViewModel : INotifyPropertyChanged  
        {  
            public event PropertyChangedEventHandler PropertyChanged;  
      
            Random r = new Random();  
            private SolidColorBrush _scb = new SolidColorBrush();  
            public SolidColorBrush Scb  
            {  
                get { return _scb; }  
                set { _scb = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("Scb")); }  
            }  
            public MyViewModel()  
            {  
                Scb= new SolidColorBrush(Color.FromRgb((byte)r.Next(1, 255), (byte)r.Next(1, 255), (byte)r.Next(1, 233)));  
      
            }  
        }  
    

    7253-1.gif

    Thanks.