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PODatagrid not updating when item added to ObservableCollection
 

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  1. PODatagrid not updating when item added to ObservableCollection
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    <p>I have a Client entity that has a collection of Notes. </p> <p>I have a DataGrid in my View that is databound to my Client.AuditableNotes collection and I can see the notes if they already exist in the database. However if I add a new AuditableNote into the collection it does not appear? </p> <p>My ClientEditViewModel has the following for my Client property:</p> <pre><code> //Backing Field private Client _client; . . . //Property public Client Client { get { return _client; } set { _client = value; RaisePropertyChanged("Client"); } } //Upon my NoteEdit usercontrol returning control back to clienteditviewmodel public void NoteEditFinished(AuditableNote note) { if (note != null) { note.AddedBy = _dbContext.SystemUsers.First(); if (note.AuditableNoteId == 0) { if (this.Client.AuditableNotes != null) { this.Client.AuditableNotes.Add(note); } else { List&lt;AuditableNote&gt; notes = new List&lt;AuditableNote&gt;(); notes.Add(note); this.Client.AuditableNotes = notes; } } else { AuditableNote existingNote = this.Client.AuditableNotes.Where(an =&gt; an.AuditableNoteId == note.AuditableNoteId).First(); existingNote = note; } } } </code></pre> <p>My Datagrid is defeined as so:</p> <pre><code>&lt;DataGrid Name="grdNotes" MinWidth="180" ItemsSource="{Binding Client.AuditableNotes, Mode=TwoWay}" AutoGenerateColumns="False" Background="Transparent" RowBackground="Transparent" IsReadOnly="True" SelectedItem="{Binding SelectedNote}" HorizontalScrollBarVisibility="Auto" DataContext="{Binding}"&gt; &lt;DataGrid.Columns&gt; &lt;DataGridTemplateColumn Header="Warning"&gt; &lt;DataGridTemplateColumn.CellTemplate&gt; &lt;DataTemplate&gt; &lt;Image x:Name="MyImage" Width="25" Height="20"/&gt; &lt;DataTemplate.Triggers&gt; &lt;DataTrigger Binding="{Binding Warning}" Value="True"&gt; &lt;Setter Property="Source" TargetName="MyImage" Value="/Assets/Images/symbol_error.png"/&gt; &lt;/DataTrigger&gt; &lt;DataTrigger Binding="{Binding Warning}" Value="False"&gt; &lt;Setter Property="Source" TargetName="MyImage" Value="/Assets/Images/symbol_information.png"/&gt; &lt;/DataTrigger&gt; &lt;/DataTemplate.Triggers&gt; &lt;/DataTemplate&gt; &lt;/DataGridTemplateColumn.CellTemplate&gt; &lt;/DataGridTemplateColumn&gt; &lt;DataGridTextColumn Header="Note" Binding="{Binding Note, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="290"/&gt; &lt;DataGridTextColumn Header="Added By" Binding="{Binding AddedBy, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/&gt; &lt;DataGridTextColumn Header="Date Added" Binding="{Binding DateAdded, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="*"/&gt; &lt;/DataGrid.Columns&gt; &lt;/DataGrid&gt; </code></pre>
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    1. PTQuestion
    1. USH.B.
    1. USCheGuevarasBeret
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    1. CO`DataContext="{Binding}"` is usually pointless, also `ItemsSource` does not bind back to the source, `TwoWay` does nothing. Also the `Client` class code would be important, further the bound collection surely is not guaranteed to be observable, you set it to a plain `List<T>`, what do you expect...
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      1. PODatagrid not updating when item added to ObservableCollection
      1. USH.B.
    2. COWhat do I expect??? Erm, the datagrid to reflect the addition of an item to the collection?
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      1. PODatagrid not updating when item added to ObservableCollection
      1. USCheGuevarasBeret
 

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