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POHow to Bind ItemsSource with ObservableCollection in WPF
 

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  1. POHow to Bind ItemsSource with ObservableCollection in WPF
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    <p>In my WPF Application - I add new item to <code>ObservableCollection</code> via <code>Button Click Event Handler</code>. Now i want to show this added item immediately as it adds to <code>ObservableCollection</code> via <code>Binding</code> to <code>ItemsControl</code> I wrote code but it is not working. Can anyone solve my problem. Here code is:</p> <p><strong>.XAML File</strong></p> <pre><code> &lt;dxlc:ScrollBox VerticalAlignment="Top"&gt; &lt;ItemsControl x:Name="lstItemsClassM" ItemsSource="{Binding Path=topp, Mode=TwoWay}"&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel Orientation="Vertical"&gt; &lt;Button Content="{Binding Name}" Tag="{Binding PKId}"/&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; &lt;/dxlc:ScrollBox&gt; </code></pre> <p><strong>.CS FILE</strong></p> <pre><code> public ObservableCollection&lt;ClassMM&gt; topp { get; set; } int dv , startindex, lastindex; public MainWindow() { InitializeComponent(); topp = new ObservableCollection&lt;ClassMM&gt;(); startindex=dv=1; topp.Add(new ClassMM() { PKId=dv, Name = "Test 1" }); dv=2; topp.Add(new ClassMM() { PKId = dv, Name = "Test 2" }); dv = 3; topp.Add(new ClassMM() { PKId = dv, Name = "Test 3" }); dv = 4; topp.Add(new ClassMM() { PKId = dv, Name = "Test 4" }); lastindex=dv = 5; topp.Add(new ClassMM() { PKId = dv, Name = "Test 5" }); } private void Button_Click(object sender, RoutedEventArgs e) { lastindex = dv = dv++; topp.Add(new ClassMM() { PKId = dv, Name = musavebutton.Content.ToString() }); foreach (var jk in topp.ToList()) { MessageBox.Show(jk.Name); } } public class ClassMM : INotifyPropertyChanged { public string _name; public int _pkid; public int PKId { get { return _pkid; } set { if (value != _pkid) { _pkid = value; NotifyPropertyChanged(); } } } public string Name { get { return _name; } set { if (value != _name) { _name = value; NotifyPropertyChanged(); } } } public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged(String propertyName = "") { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } } </code></pre> <p>}</p>
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    1. USuser2835256
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    1. COMy guess is your MainWindow need to implement iNotifyPropertyChanged. But the NotifyPropertyChanged on set in the answer from HichemCSharp is not required (but it does not hurt).
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      1. USpaparazzo
 

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