WPF Databinding examples

1. 最简单的形式
   <TextBlock Text="{Binding ElementName=lbColor, Path=SelectedItem.Content}" />
   
   <TextBlock x:Name="tbSelectedColor"
       Text="{Binding ElementName=lbColor, Path=SelectedItem.Content, Mode=OneWay}"
       Background="{Binding ElementName=lbColor, Path=SelectedItem.Content, Mode=OneWay}"/>
   
   <TextBox x:Name="txtSelectedColor" 
       Text="{Binding ElementName=lbColor, Path=SelectedItem.Content, Mode=TwoWay}"
       Background="{Binding ElementName=lbColor, Path=SelectedItem.Content, Mode=OneWay}"/>
   
2. Bingding to XML
   <ListBox x:Name="lbColor"
   IsSynchronizedWithCurrentItem="True"
   ItemsSource="{Binding Source={StaticResource MoreColors}, XPath=color/@name}"/>
   
   <CollectionViewSource x:Key="personView"
       Source="{Binding Source={StaticResource persons}}">
       <CollectionViewSource.SortDescriptions>
           <ComponentModel:SortDescription PropertyName="City" Direction="Ascending" />
           <ComponentModel:SortDescription PropertyName="FullName" Direction="Descending" />
       </CollectionViewSource.SortDescriptions>
   </CollectionViewSource>
   
   <StackPanel
       DataContext="{Binding Source={StaticResource personView}}" >
       <TextBlock Text="{Binding Path=FullName}"/>
       <TextBlock Text="{Binding Path=Title}"/>
       <TextBlock Text="{Binding Path=City}"/>
   </StackPanel>
   
   
3. Binding C# code
   ---------------------------------------------------------------------------------------------
   public class Person : INotifyPropertyChanged
   {
       string _firstName;
       string _lastName;

    public string FirstName
    {
        get { return _firstName; }
        set
        {
            _firstName = value;
            this.OnPropertyChanged("FirstName");
            this.OnPropertyChanged("FullName");
        }
    }

    public string LastName
    {
        get { return _lastName; }
        set
        {
            _lastName = value;
            this.OnPropertyChanged("LastName");
            this.OnPropertyChanged("FullName");
        }
    }

    public string FullName
    {
        get
        {
            return String.Format("{0}, {1}",
                this.LastName, this.FirstName);
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    void OnPropertyChanged(string propName)
    {
        if (this.PropertyChanged != null)
            this.PropertyChanged(
                this, new PropertyChangedEventArgs(propName));
    }    
}
---------------------------------------------------------------------------------------------
var person = new Person { FirstName = "Josh", LastName = "Smith" };
Binding b = new Binding();
b.Source = person;
b.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;
b.Path = new PropertyPath("FirstName");
this.firstNameTextBox.SetBinding(TextBox.TextProperty, b);