I want blinking label content in wpf window, how to do it?

Question

1.00/5 (1 vote)

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I want to show error Message to user, but error should display in blinking manner
I don't know how to do it in wpf.
so please help me.
thank you
sushil

What I have tried:

I tried TextDecoration property but it is not in wpf may be. i dont know.

Posted 14-Feb-16 17:15pm

Member 11859517

Updated 22-Mar-16 23:35pm

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Comments

Sinisa Hajnal 15-Feb-16 2:53am

Don't do blinking messages. That is bad design and known as such for years. At least, not permanent blinking. Couple of blinks and then stop is OK.

You can do it with timer that shows and hides the control for quarter of the second or so and repeat that several times.

[no name] 16-Feb-16 20:28pm

You will need to use the timer control, and set how many milliseconds you wish for ticks to update your label control by hiding, and showing your control again as per timer tick handler. All you need is here: https://msdn.microsoft.com/en-us/library/system.timers.timer(v=vs.110).aspx

Ammar Shaukat 30-Jan-18 2:28am

@Sinisa Hajnal , your solution is good. We can make a function that will take few parameters like , total time in seconds and an Int that will decide how many times a label will blink in 1 second.

2 solutions

Solution 2

Declare This StoryBoard in Resources

HTML

<storyboard x:key="FlashMe"
                        RepeatBehavior="Forever">
                <objectanimationusingkeyframes storyboard.targetproperty="(UIElement.Visibility)">
                    <discreteobjectkeyframe keytime="0:0:0.5">
                        <discreteobjectkeyframe.value>
                            <visibility>Collapsed</visibility>
                        </discreteobjectkeyframe.value>
                    </discreteobjectkeyframe>
                    <discreteobjectkeyframe keytime="0:0:1">
                        <discreteobjectkeyframe.value>
                            <visibility>Visible</visibility>
                        </discreteobjectkeyframe.value>
                    </discreteobjectkeyframe>
                </objectanimationusingkeyframes>
            </storyboard>

& in Your ButtonClickEvent

write

textBox.BeginStoryboard(FindResource("FlashMe") as Storyboard);

Posted 22-Mar-16 23:35pm

TABiSH777

Updated 22-Mar-16 23:39pm

v4

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ryanba29 · Accepted Answer · 2016-02-25T05:21:00

Have you considered using a animation to control the blinking message ? For an example I have simply added a button and a textblock to XAML. Then created a click event for the button.

C#

<Grid>
        <Button x:Name="button" Content="Button" HorizontalAlignment="Left" VerticalAlignment="Top" Width="75" Click="button_Click"/>
        <TextBlock x:Name="textBlock" HorizontalAlignment="Left" TextWrapping="Wrap" Text="Warning" VerticalAlignment="Top" Margin="0,26,0,0"/>

    </Grid>

And then add the following to my main windows.

C#

public partial class MainWindow : Window
    {
        DoubleAnimation da = new DoubleAnimation();
        public MainWindow()
        {
            InitializeComponent();
           
            da.From = 30;
            da.To = 35;
            da.AutoReverse = true;
            da.RepeatBehavior = new RepeatBehavior(3);
            da.Duration = new Duration(TimeSpan.FromSeconds(0.5));
            
        }

        private void button_Click(object sender, RoutedEventArgs e)
        {
            textBlock.BeginAnimation(TextBlock.FontSizeProperty, da);
        }
    }

This