Create Collection based Resource for data binding : ObservableCollection « Windows Presentation Foundation « VB.Net






Create Collection based Resource for data binding

Create Collection based Resource for data binding
    

<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="WPF" Height="300" Width="180">

    <Window.Resources>
        <local:SortableCountries x:Key="sortableCountries"/>
    </Window.Resources>
    <Grid>
        <StackPanel>
            <ItemsControl ItemsSource="{StaticResource sortableCountries}" />
            <Button Click="SortButton_Click" Content="Sort" Margin="8" />
        </StackPanel>

    </Grid>

</Window>

//File:Window.xaml.vb

Imports System
Imports System.Collections
Imports System.Windows
Imports System.Windows.Data
Imports System.Collections.ObjectModel

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub SortButton_Click(sender As Object, args As RoutedEventArgs)
      Dim sortableCountries As SortableCountries = DirectCast(Me.Resources("sortableCountries"), SortableCountries)

      Dim lcv As ListCollectionView = DirectCast(CollectionViewSource.GetDefaultView(sortableCountries), ListCollectionView)

      lcv.CustomSort = New SortCountries()
    End Sub
  End Class

  Public Class SortCountries
    Implements IComparer
    Public Function Compare(x As Object, y As Object) As Integer Implements IComparer.Compare
      Dim stringX As String = x.ToString()
      Dim stringY As String = y.ToString()

      Return stringX.CompareTo(stringY)

    End Function
  End Class

  Public Class SortableCountries
    Inherits ObservableCollection(Of String)
    Public Sub New()
      Me.Add("C")
      Me.Add("B")
      Me.Add("A")
    End Sub
  End Class
End Namespace

   
    
    
    
  








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3.Bind to ObservableCollection and ItemsSourceBind to ObservableCollection and ItemsSource