WPF-15：AutoCompleteBox的使用(实现下拉列表)

下拉列表之前用这种popup控件实现（ http://blog.csdn.net/yysyangyangyangshan/article/details/8177878），使用起来也比较不方便。好在wpf中还有一个控件AutoCompleteBox可以来实现。不过使用之前需要引用System.Windows.Controls.Input.Toolkit.dll（最好安装WPF Toolkit，这里就包含了该dll）。本文对应的项目文件中含有该dll（ http://download.csdn.net/detail/yysyangyangyangshan/5304822）。
下面直接看代码：
界面：

<Window x:Class="TestPoupSearchbox.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:tookit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Input.Toolkit"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>

        <tookit:AutoCompleteBox x:Name="searchTextBox"  Grid.Row="1" 
                                ValueMemberPath="SerchString" Margin="10"
                                FontSize="20" Height="50" Foreground="Black">
            <tookit:AutoCompleteBox.ItemTemplate>
                <DataTemplate>
                    <TextBlock Margin="5,5" FontSize="26">
                            <Run Text="{Binding SerchString}" Foreground="Blue"/>
                        <Run Text="{Binding Name}" Foreground="Gray"/>
                    </TextBlock>
                </DataTemplate>
            </tookit:AutoCompleteBox.ItemTemplate>
        </tookit:AutoCompleteBox>

    </Grid>
</Window>

下拉列表绑定的数据模型类：

/// <summary>
    /// 绑定模型类
    /// </summary>
    public class AutoCompleteModel : INotifyPropertyChanged
    {
        public void OnPropertyChanged(string propname)
        {
            if (this.PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propname));
            }
        }


        public event PropertyChangedEventHandler PropertyChanged;


        private string searchString = string.Empty;


        private string name = string.Empty;


        public string SerchString
        {
            get { return searchString; }


            set
            {
                searchString = value;


                this.OnPropertyChanged("SerchString");
            }
        }


        public string Name
        {
            get { return name; }


            set
            {
                name = value;


                this.OnPropertyChanged("Name");
            }
        }
    }

后台使用：

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();


            this.searchTextBox.Populating += new PopulatingEventHandler(AutoCompleteBox_Populating);


            this.searchTextBox.SelectionChanged += new SelectionChangedEventHandler(searchTextBox_SelectionChanged);
        }


        void searchTextBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            AutoCompleteModel model = this.searchTextBox.SelectedItem as AutoCompleteModel;


            if (model != null)
            {
                MessageBox.Show(model.Name);
            }
        }


        private void AutoCompleteBox_Populating(object sender, PopulatingEventArgs e)
        {
            e.Cancel = true;


            List<AutoCompleteModel> data = new List<AutoCompleteModel>();


            for (int i = 0; i < 10; i++)
            {
                AutoCompleteModel model = new AutoCompleteModel();


                model.SerchString = "1234";


                model.Name = "测试" + i;


                data.Add(model);
            }


            this.searchTextBox.ItemsSource = data;


            //设置那种模式匹配
            this.searchTextBox.FilterMode = AutoCompleteFilterMode.Contains;


            this.searchTextBox.PopulateComplete();
        }
    }

效果图：

注意：

1、AutoCompleteBox中ValueMemberPath="SerchString"，要指定查询的字段。
2、 this.searchTextBox.FilterMode = AutoCompleteFilterMode.Contains，需要注意设置搜索时的匹配方式。
代码下载： http://download.csdn.net/detail/yysyangyangyangshan/5304822