[WPF] ListBox示范

WPF的功能真是强大,居然这么简单就可以设定ListBoxItem的颜色

 

 

 

using System;using System.Reflection;using System.Windows;using System.Windows.Controls;using System.Windows.Input;using System.Windows.Media;class ListWithListBoxItems : Window{ [STAThread] public static void Main() { Application app = new Application(); app.Run(new ListWithListBoxItems()); } public ListWithListBoxItems() { Title = "List with ListBoxItem"; // Create ListBox as content of window. ListBox lstbox = new ListBox(); lstbox.Height = 150; lstbox.Width = 150; lstbox.SelectionChanged += ListBoxOnSelectionChanged; Content = lstbox; // Fill ListBox with ListBoxItem objects. PropertyInfo[] props = typeof(Colors).GetProperties(); foreach (PropertyInfo prop in props) { Color clr = (Color)prop.GetValue(null, null); bool isBlack = .222 * clr.R + .707 * clr.G + .071 * clr.B > 128; ListBoxItem item = new ListBoxItem(); item.Content = prop.Name; item.Background = new SolidColorBrush(clr); item.Foreground = isBlack ? Brushes.Black : Brushes.White; item.HorizontalContentAlignment = HorizontalAlignment.Center; item.Padding = new Thickness(2); lstbox.Items.Add(item); } } void ListBoxOnSelectionChanged(object sender, SelectionChangedEventArgs args) { ListBox lstbox = sender as ListBox; ListBoxItem item; if (args.RemovedItems.Count > 0) { item = args.RemovedItems[0] as ListBoxItem; String str = item.Content as String; item.Content = str.Substring(2, str.Length - 4); item.FontWeight = FontWeights.Regular; } if (args.AddedItems.Count > 0) { item = args.AddedItems[0] as ListBoxItem; String str = item.Content as String; item.Content = "[ " + str + " ]"; item.FontWeight = FontWeights.Bold; } item = lstbox.SelectedItem as ListBoxItem; if (item != null) Background = item.Background; }}