Create CollectionViewSource : CollectionViewSource « Windows Presentation Foundation « C# / C Sharp

1. C# / C Sharp
2. Windows Presentation Foundation
3. CollectionViewSource

Create CollectionViewSource

  


<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"
  xmlns:compModel="clr-namespace:System.ComponentModel;assembly=WindowsBase"
  xmlns:data="clr-namespace:System.Windows.Data;assembly=PresentationFramework" 
  Title="CollectionViewSourceBinding" Height="300" Width="300">
  <Window.Resources>
    <local:People x:Key="Family">
      <local:Employee Name="A" Age="11" />
      <local:Employee Name="B" Age="12" />
      <local:Employee Name="C" Age="28" />
      <local:Employee Name="D" Age="88" />
    </local:People>

    <local:AgeToRangeConverter x:Key="ageConverter" />
    
    <CollectionViewSource x:Key="SortedGroupedFamily" Source="{StaticResource Family}">
      
      <CollectionViewSource.SortDescriptions>
        <compModel:SortDescription PropertyName="Name" Direction="Ascending" />
        <compModel:SortDescription PropertyName="Age" Direction="Descending" />
      </CollectionViewSource.SortDescriptions>
      
      <CollectionViewSource.GroupDescriptions>
        <data:PropertyGroupDescription PropertyName="Age" Converter="{StaticResource ageConverter}" />
        <data:PropertyGroupDescription PropertyName="Age" />
      </CollectionViewSource.GroupDescriptions>
    </CollectionViewSource>

  </Window.Resources>
  <Grid>
    <ListBox ItemsSource="{Binding Source={StaticResource SortedGroupedFamily}}" DisplayMemberPath="Name">
      <ListBox.GroupStyle>
        <x:Static Member="GroupStyle.Default" />
      </ListBox.GroupStyle>
    </ListBox>
  </Grid>
</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.ComponentModel;
using System.Collections.ObjectModel;


namespace WpfApplication1 {

  public class Employee : 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 {
        if( this.name == value ) { return; }
        this.name = value;
        Notify("Name");
      }
    }

    int age;
    public int Age {
      get { return this.age; }
      set {
        if( this.age == value ) { return; }
        this.age = value;
        Notify("Age");
      }
    }

    public Employee() { }
    public Employee(string name, int age) {
      this.name = name;
      this.age = age;
    }
  }

  class People : ObservableCollection<Employee> { }

  public partial class Window1 : System.Windows.Window {
    public Window1() {
      InitializeComponent();
    }

  }

  public class AgeToRangeConverter : IValueConverter {

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) {
      return (int)value < 25 ? "Under 25" : "Over 25";
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) {

      throw new NotImplementedException();
    }
  }

}

   
    
  

Related examples in the same category

1.	Use CollectionViewSource to sort and group data in XAML.
2.	Apply Custom Grouping to a Collection