WPF智能输入提示

WPF智能输入提示是用一个textBox和Popup完成的，下面看具体代码：

<Window x:Class="WPFPopup.ABCD"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"Title="ABCD" Height="300" Width="300"><Grid><TextBox Canvas.Left="371" Canvas.Top="25" Height="23" Name="textBox1" Width="120" KeyUp="textBox1_KeyUp" Margin="75,79,83,159" /><TextBlock Height="23" HorizontalAlignment="Left" Margin="75,44,0,0" Name="textBlock1" Text="TextBlock" VerticalAlignment="Top" Width="155" /></Grid></Window>

 

namespace WPFPopup{/// <summary>/// ABCD.xaml 的交互逻辑/// </summary>public partial class ABCD : Window{public List<string> listStr;public ABCD(){InitializeComponent();listStr = new List<string>();listStr.Add("a");listStr.Add("ab");listStr.Add("abc");listStr.Add("abcd");listStr.Add("b");listStr.Add("bc");listStr.Add("bcd");listStr.Add("c");listStr.Add("cd");listStr.Add("d");listStr.Add("da");listStr.Add("dab");listStr.Add("dabc");}public Popup pop = new Popup();private void textBox1_KeyUp(object sender, KeyEventArgs e){if (textBox1.Text != ""){var item = listStr.Where(a => a.Contains(textBox1.Text));if (item.ToList<string>().Count > 0){pop = this.createPopup(pop, item.ToList<string>(), textBox1);pop.IsOpen = true;}else{pop.IsOpen = false;}}else{pop.IsOpen = false;}}public void listbox_MouseDoubleClick(object sender, MouseButtonEventArgs e){ListBox box = sender as ListBox;string itemvalue = box.SelectedValue as string;this.textBlock1.Text = itemvalue;this.textBox1.Text = itemvalue;pop.IsOpen = false;}public Popup createPopup(Popup pop, List<string> listSource, UIElement element){Border border = new Border();border.BorderBrush = new SolidColorBrush(Colors.Black);//border.BorderThickness = new Thickness(1.0);//设置边框宽度StackPanel panel1 = new StackPanel();panel1.Children.Clear();panel1.Background = new SolidColorBrush(Colors.LightGray);ListBox listbox = new ListBox();listbox.Background = new SolidColorBrush(Colors.WhiteSmoke);listbox.MinWidth = 100;listbox.Height = 120;listbox.ItemsSource = listSource;listbox.MouseDoubleClick += new MouseButtonEventHandler(listbox_MouseDoubleClick);panel1.Children.Add(listbox);border.Child = panel1;pop.Child = border;pop.PlacementTarget = element;return pop;}}}