Mega Code Archive

 

Categories / C# / WPF

 

Use ObservableCollection as Resource

<Canvas xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     xmlns:src="clr-namespace:ListBoxEvent"  x:Class="ListBoxEvent.Pane1">   <Canvas.Resources>     <src:myColors x:Key="Colors"/>   </Canvas.Resources>   <StackPanel>       <TextBox Name="tb" Width="140" Height="30"></TextBox>       <ListBox Name="lb" Width="100" Height="55" SelectionChanged="PrintText" SelectionMode="Single">         <ListBoxItem>Item 1</ListBoxItem>         <ListBoxItem>Item 2</ListBoxItem>         <ListBoxItem>Item 3</ListBoxItem>         <ListBoxItem>Item 4</ListBoxItem>         <ListBoxItem>Item 5</ListBoxItem>         <ListBoxItem>Item 6</ListBoxItem>         <ListBoxItem>Item 7</ListBoxItem>         <ListBoxItem>Item 8</ListBoxItem>         <ListBoxItem>Item 9</ListBoxItem>         <ListBoxItem>Item 10</ListBoxItem>       </ListBox>   </StackPanel> </Canvas> //File:Window.xaml.cs using System; using System.ComponentModel; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Data; using System.Windows.Media; using System.Collections.ObjectModel; namespace ListBoxEvent {     public class myColors : ObservableCollection<string>     {         public myColors()         {             Add("A");             Add("B");             Add("C");             Add("D");             Add("E");             Add("F");         }     }     public partial class Pane1 : Canvas     {         public Pane1() : base(){             InitializeComponent();         }         void PrintText(object sender, SelectionChangedEventArgs args)         {             ListBoxItem lbi = ((sender as ListBox).SelectedItem as ListBoxItem);             tb.Text = "   You selected " + lbi.Content.ToString() + ".";         }     } }