使用了插件WPFToolKit。（直接在Nuget中搜即可）
使用方法参考这篇文章：
http://www.broculos.net/2014/04/wpf-autocompletebox-autocomplete-text.html
但是光参考上面的文章做还是有些小问题的，下面是我用WAF框架（MVVM）的一个小例子：
ShellWindow.xaml
<Window x:Class="WafApplication1.Presentation.Views.ShellWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:vm="clr-namespace:WafApplication1.Applications.ViewModels"
xmlns:toolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Input.Toolkit"
mc:Ignorable="d" Title="{Binding Title}" Icon="{StaticResource ApplicationIcon}" Width="525" Height="350"
d:DataContext="{d:DesignInstance vm:ShellViewModel}">
<DockPanel>
<Grid>
<toolkit:AutoCompleteBox
Width="100" Height="30"
ItemsSource="{Binding BuildList}"
ValueMemberBinding="{Binding Name}"
FilterMode="Contains"
PreviewKeyDown="autoCompleteBox_PreviewKeyDown"><!-- 在AutoCompleteBox中注册PreviewKeyDown，键盘回车键选中列表Item -->
<toolkit:AutoCompleteBox.ItemTemplate>
<DataTemplate>
<Label
Content="{Binding Name}"
Width="100"
MouseLeftButtonUp="Label_MouseLeftButtonUp"/><!-- 在Item中注册MouseLeftButtonUp，鼠标左键点击选中列表Item -->
</DataTemplate>
</toolkit:AutoCompleteBox.ItemTemplate>
</toolkit:AutoCompleteBox>
</Grid>
</DockPanel>
</Window>
ShellWindow.xaml.cs 界面的后台代码。传递前台注册的鼠标左键事件和键盘Enter回车键事件。
private void Label_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
Label label = sender as Label;
Build bulid = label.DataContext as Build;
houseTypeViewModel.Value.SelectBuildCommand.Execute(bulid);
}
private void autoCompleteBox_PreviewKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Enter)
{
AutoCompleteBox acBox = sender as AutoCompleteBox;
Build build = acBox.SelectedItem as Build;
houseTypeViewModel.Value.SelectBuildCommand.Execute(build);
}
}
ShellViewModel.cs
using System.ComponentModel.Composition;
using System.Waf.Applications;
using System.Windows.Input;
using WafApplication1.Applications.Views;
using System.Collections.ObjectModel;
namespace WafApplication1.Applications.ViewModels
{
[Export]
internal class ShellViewModel : ViewModel<IShellView>
{
// 自动完成的文本框
private ObservableCollection<Build> buildList;
public ObservableCollection<Build> BuildList
{
get { return buildList; }
set { SetProperty(ref buildList, value); }
}
// 自动完成文本框，用鼠标左键、键盘Enter键选中一个Item
private ICommand selectBuildCommand;
public ICommand SelectBuildCommand
{
get { return selectBuildCommand; }
set { SetProperty(ref selectBuildCommand, value); }
}
[ImportingConstructor]
public ShellViewModel(IShellView view)
: base(view)
{
BuildList = new ObservableCollection<Build>();
}
public void Show()
{
ViewCore.Show();
}
private void Close()
{
ViewCore.Close();
}
public class Build
{
public string Name { get; set; }
public int Id { get; set; }
}
}
}using System;
using System.ComponentModel.Composition;
using System.Waf.Applications;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using WafApplication1.Applications.ViewModels;
using WafApplication1.Presentation.Views;
namespace WafApplication1.Applications.Controllers
{
[Export]
internal class ApplicationController
{
private readonly ShellViewModel shellViewModel;
private ShellWindow shellView;
private readonly DelegateCommand selectBuildCommand;
[ImportingConstructor]
public ApplicationController(ShellViewModel shellViewModel)
{
this.shellViewModel = shellViewModel;
shellView = shellViewModel.View as ShellWindow;
this.selectBuildCommand = new DelegateCommand(p => SelectBuildCommand((Builds)p));
}
public void Initialize()
{
shellViewModel.SelectBuildCommand = selectBuildCommand;
// 填充数据
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "一胞广场", Id = 0 });
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "二胞广场", Id = 1 });
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "三胞广场", Id = 2 });
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "四胞广场", Id = 3 });
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "五胞广场", Id = 4 });
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "六胞广场", Id = 5 });
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "七胞广场", Id = 6 });
shellViewModel.BuildList.Add(new ShellViewModel.Build() { Name = "八胞广场", Id = 7 });
}
public void Run()
{
shellViewModel.Show();
}
public void Shutdown()
{
}
private void SelectBuildCommand(Builds bulid)
{
// do what you want...
}
}
}测试效果：
一些小问题：
- 需要指定FilterMode为Contains包含，否则只能从头开始匹配，如输入“桂”和“园”都不能匹配到“碧桂园”，只有输入“碧”和“碧桂”才行，这显然不符合用户需求。
- 如果不使用ItemTemplate模板，则显示的会是对象的完整toString（名称空间 + 类名 + 属性名 + 属性值）
- 使用ValueMemberBinding=”{Binding Name}”或是ValueMemberPaht=”Name”都行，貌似。
- 关于选项的事件触发，我试过用给DataTemplate中的Label注册鼠标点击事件可以成功，但键盘Enter键键盘事件却无法触发！解决办法是给AutoCompleteBox控件添加PreviewKeyDown事件，而不是给Item添加事件！参考这 https://*.com/questions/4996731/wpf-autocompletebox-and-the-enter-key
- 在AutoCompleteBox中注册PreviewKeyDown，键盘回车键选中列表Item。
- 在Item中注册MouseLeftButtonUp，鼠标左键点击选中列表Item。