(WPF) ComboBox 之綁定

1.  在UI（Xaml) 里面直接綁定數據.

<Window x:Class="WpfTutorialSamples.ComboBox_control.ComboBoxSample"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="ComboBoxSample" Height="150" Width="200">
    <StackPanel Margin="10">
        <ComboBox>
            <ComboBoxItem>ComboBox Item #1</ComboBoxItem>
            <ComboBoxItem IsSelected="True">ComboBox Item #2</ComboBoxItem>
            <ComboBoxItem>ComboBox Item #3</ComboBoxItem>
        </ComboBox>
    </StackPanel>
</Window>

效果如下：

 

2. 動態綁定數據.

2.1 綁定XML到ComboBox

     前台Xaml里面需要在Resource里面指定XmlDataProvider. 並設定綁定.  后台無需任何代碼。

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
  <Window.Resources>
    <XmlDataProvider x:Key="DataProvider" Source="pack://siteoforigin:,,,/TestData.xml" XPath="Countries"/>
  </Window.Resources>
  <StackPanel>
    <ComboBox x:Name="com_Country" ItemsSource="{Binding Source={StaticResource DataProvider}, XPath=Country}" DisplayMemberPath="@Name" Margin="5"/>
    <ComboBox x:Name="com_City" DataContext="{Binding ElementName=com_Country, Path=SelectedItem}" ItemsSource="{Binding XPath=City}" DisplayMemberPath="@Name" Margin="5"/>
    <TextBlock Margin="5">
      <TextBlock.Inlines>
        <Run Text="Selected Country: "/>
        <Run Text="{Binding ElementName=com_Country, Path=SelectedItem.Attributes[Name].Value, Mode=OneWay}"/>
        <LineBreak/>        
        <Run Text="Selected City: "/>
        <Run Text="{Binding ElementName=com_City, Path=SelectedItem.Attributes[Name].Value}"/>
      </TextBlock.Inlines>
    </TextBlock>
  </StackPanel>
</Window>

 

3. 綁定Dictionary到ComboBox.

 

 private void BindingToProjects()
        {
            this.projects.Add("AAA", new List<string>()
            {
                "VID_045", 
                "VID_046"

            this.projects.Add("BBB", new List<string>()
            {
                "VID_111", 
                "VID_222", 
            });

            this.cbProjectName.ItemsSource = this.projects;
            this.cbProjectName.DisplayMemberPath = "Key";
            this.cbProjectName.SelectedValuePath = "Key"; 

        }

        private void cbProjectName_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            this.lbVidPid.Items.Clear(); 

            List<string> registryList = this.projects.Where(dic => dic.Key == this.cbProjectName.SelectedValue.ToString()).Select(dic => dic.Value).First();   

            foreach (var registryKey in registryList)
            {
                this.usbRegistryList.Add(registryKey);
                this.lbVidPid.Items.Add(registryKey);
            }

        }

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

參考： http://www.wpf-tutorial.com/list-controls/combobox-control/