WPF

<Grid Name="theGrid" Background="SteelBlue" >
    <Grid.Triggers>
        <EventTrigger RoutedEvent="Grid.Loaded">
            <BeginStoryboard x:Name="gridBeginStoryboard" >
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetName="theGrid"
                                     Storyboard.TargetProperty="Opacity"
                                     From="1.0" To="0.0" Duration="0:0:2"
                                     AutoReverse="True" RepeatBehavior="Forever" />
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger>
        <EventTrigger SourceName="theGrid" RoutedEvent="Grid.MouseLeftButtonDown">
            <StopStoryboard BeginStoryboardName="gridBeginStoryboard" />
        </EventTrigger>
    </Grid.Triggers>
</Grid>

Mark Salsbery
Microsoft MVP - Visual C++

class Employee 
    {
        string _name;
        public string Name
        {
            get
            {
                return _name;
            }
            set
            {
                _name = value;
            }
        }
        public Employee()
        { }
        public Employee(string strName)
        {
            this.Name = _name;
        }
    }

public class ViewModelBase : INotifyPropertyChanged
{
  public event PropertyChangedEventHandler PropertyChanged;
  protected virtual void OnChanged(string property)
  {
    PropertyChangedEventHandler handler = PropertyChanged;
    if (handler == null) return;
    handler(this, new PropertyChangedEventArgs(property));
  }
}

public class Employee : ViewModelBase
{
  string _name;
  public string Name
  {
    get
    {
      return _name;
    }
    set
    {
      if (_name == value) return;
      _name = value;
      OnChanged("Name");
    }
  }
  public Employee(string strName)
  {
    this.Name = strName;
  }
}

this.Name = _name

Pete O'Hanlon wrote:

Strictly speaking, in this case he doesn't because of the sequence of events he's using to hook things up. At the point he assigns Name, the class isn't bound to the DataContext so there's nothing for the PropertyChangedEventHandler to raise the notification to.

 

<Grid Name="GrdParams" >
<TextBlock Grid.Column="0" Grid.Row="0" Text="Frequency"  VerticalAlignment="Center" />
<Slider Grid.Column="1" Grid.Row="0" Minimum="0" Maximum="0.25" SmallChange="0.001" Value="{Binding Mode=TwoWay, Path=Frequency}" ValueChanged="FreqSlider_ValueChanged" />
<TextBlock Name="TxtFreq" Grid.Column="2" Grid.Row="0" />
</Grid>

private void FreqSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
    if (this.TxtFreq != null)
    {
        this.TxtFreq.Text = (sender as Slider).Value.ToString("###0.####");
    }
}

Paul Selormey wrote:

How can I render this on a canvas of the main thread after the background thread is completed?

Mark Salsbery
Microsoft MVP - Visual C++