<Window x:Class="WpfApplication1.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApplication1"
Title="DisplayAndValueMemberBinding"
Height="300"
Width="300">
<Window.Resources>
<local:People x:Key="Family">
<local:Person Name="A" Age="11" />
<local:Person Name="B" Age="12" />
<local:Person Name="C" Age="38" />
</local:People>
<local:NamedAges x:Key="NamedAgeLookup">
<local:NamedAge NameForAge="zero" AgeId="0" />
<local:NamedAge NameForAge="one" AgeId="1" />
<local:NamedAge NameForAge="two" AgeId="2" />
</local:NamedAges>
</Window.Resources>
<StackPanel DataContext="{StaticResource Family}">
<ListBox Name="lb" ItemsSource="{Binding}" IsSynchronizedWithCurrentItem="True" DisplayMemberPath="Name" SelectedValuePath="Age" />
<TextBox Grid.Row="1" Text="{Binding Path=Name}" />
<ComboBox Grid.Row="2" ItemsSource="{Binding Source={StaticResource NamedAgeLookup}}" DisplayMemberPath="NameForAge" SelectedValuePath="AgeId" SelectedValue="{Binding Path=Age}" />
<Button Name="birthdayButton">Birthday</Button>
<Button Name="backButton">Back</Button>
<Button Name="forwardButton">Forward</Button>
</StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using System.ComponentModel;
namespace WpfApplication1 {
public class Person : INotifyPropertyChanged {
public event PropertyChangedEventHandler PropertyChanged;
protected void Notify(string propName) {
if( this.PropertyChanged != null ) {
PropertyChanged(this, new PropertyChangedEventArgs(propName));
}
}
string name;
public string Name {
get { return this.name; }
set {
this.name = value;
Notify("Name");
}
}
int age;
public int Age {
get { return this.age; }
set {
this.age = value;
Notify("Age");
}
}
}
class People : ObservableCollection<Person> { }
public class NamedAge : INotifyPropertyChanged {
public event PropertyChangedEventHandler PropertyChanged;
protected void Notify(string propNameForAge) {
if( this.PropertyChanged != null ) {
PropertyChanged(this, new PropertyChangedEventArgs(propNameForAge));
}
}
string nameForAge;
public string NameForAge {
get { return this.nameForAge; }
set {
this.nameForAge = value;
Notify("NameForAge");
}
}
int ageId;
public int AgeId {
get { return this.ageId; }
set {
this.ageId = value;
Notify("AgeId");
}
}
}
class NamedAges : ObservableCollection<NamedAge> { }
public partial class Window1 : System.Windows.Window {
public Window1() {
InitializeComponent();
lb.MouseDoubleClick += lb_MouseDoubleClick;
this.birthdayButton.Click += birthdayButton_Click;
this.backButton.Click += backButton_Click;
this.forwardButton.Click += forwardButton_Click;
}
void lb_MouseDoubleClick(object sender, MouseButtonEventArgs e) {
int index = lb.SelectedIndex;
if( index < 0 ) { return; }
Person item = (Person)lb.SelectedItem;
int value = (int)lb.SelectedValue;
Console.WriteLine(index);
Console.WriteLine(item.Name);
Console.WriteLine(item.Age);
Console.WriteLine(value);
}
ICollectionView GetFamilyView() {
People people = (People)this.FindResource("Family");
return CollectionViewSource.GetDefaultView(people);
}
void birthdayButton_Click(object sender, RoutedEventArgs e) {
ICollectionView view = GetFamilyView();
Person person = (Person)view.CurrentItem;
++person.Age;
Console.WriteLine(person.Name);
Console.WriteLine(person.Age);
}
void backButton_Click(object sender, RoutedEventArgs e) {
ICollectionView view = GetFamilyView();
view.MoveCurrentToPrevious();
if( view.IsCurrentBeforeFirst ) {
view.MoveCurrentToFirst();
}
}
void forwardButton_Click(object sender, RoutedEventArgs e) {
ICollectionView view = GetFamilyView();
view.MoveCurrentToNext();
if( view.IsCurrentAfterLast ) {
view.MoveCurrentToLast();
}
}
}
}
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