how to show label for couple of seconds in wpf?

问题

i want to show a label for a 3 seconds only and then disappear it. i am working in wpf application.

public DispatcherTimer timer = new DispatcherTimer(); 
timer.Tick += new EventHandler(timer_Tick);

i started timer from the function

timer.Start(); 

private void timer_Tick(object sender, EventArgs e)
{
      /*
      if timer equals 3 seconds then 
      timer.stop();
      lblToast.Visibility = Visibility.Hidden;
      else
      lblToast.Visibility = Visibility.Visible;
      */
}

is this right way ? or is there any other easy way ?

回答1:

Set your Interval to 3000 and then just hide the label in the Tick event.

回答2:

Using Wpf animation you can do this very easily.For animation visit this link

   <Label Content="Hello World">
        <Label.Triggers>
            <EventTrigger RoutedEvent="Loaded">
                <BeginStoryboard>
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames BeginTime="0:0:0"  Storyboard.TargetProperty="Visibility">
                            <DiscreteObjectKeyFrame KeyTime="0:0:3" Value="{x:Static Visibility.Collapsed}"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </BeginStoryboard>
            </EventTrigger>
        </Label.Triggers>
    </Label>

来源：https://stackoverflow.com/questions/27648539/how-to-show-label-for-couple-of-seconds-in-wpf