WPF Example: XmlDataProvider & Editable ComboBox

代码如下：

MainWindow.xaml

<Window x:Class="ComboBoxDemo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="80" Width="329">
    <StackPanel Orientation="Horizontal" Width="304">
        
        <StackPanel.Resources>
            <XmlDataProvider x:Key="dataMemberList" XPath="/MemberList">
                <x:XData>
                    <MemberList xmlns="">
                        <Member>
                            <Name>Stephone</Name>
                            <Id>54765</Id>
                        </Member>
                        <Member>
                            <Name>Alex</Name>
                            <Id>32768</Id>
                        </Member>
                        <Member>
                            <Name>Smith</Name>
                            <Id>44326</Id>
                        </Member>
                    </MemberList>
                </x:XData>
            </XmlDataProvider>
        </StackPanel.Resources>
        
        <Label Height="26">Choose/Input member name:  </Label>
        <ComboBox Name="memberNameEditor" Height="24" Width="100"
                  ItemsSource="{Binding Source={StaticResource dataMemberList}, XPath=Member}" 
                  DisplayMemberPath="Name"
                  IsEditable="True" />
        <Button Height="24" Margin="4,0,4,0"
                Content="OK"
                Click="ButtonOK_Click"/>
    </StackPanel>
</Window>

MainWindow.xaml.cs

using System.Windows;

namespace ComboBoxDemo
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void ButtonOK_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show(this.memberNameEditor.Text);
        }
    }
}

Notes:

1. 在XmlDataProvider中，必须申明 xmlns=""，否则XPath搜索路径会失效；

2. 为了使ComboBox可编辑，需设置 IsEditable="True"。

Vs2010 Solution download: http://download.csdn.net/detail/xinyaping/4356561