CODEWITHSUNDEEP
c#timeout
akinuri
akinuri

Reputation: 12027

Set simple timeout

I've checked the other questions in SO for timeout in C#, but since I'm a beginner, I don't really know how to implement them into my code. They look too sophisticated.

I have a text box and I added a click event. Upon click, user copies the content of the text box to the clipboard. To make the copy process noticeable to the user, I change the back color of the text box. Once the content is copied, I want to change the back color of the text box back to normal. So I need to set a timeout.

private void IDBox_Click(object sender, EventArgs e)
{
    CopyToClipboard((TextBox)sender);
}

private void CopyToClipboard(TextBox textBox)
{
    if (textBox.Text != "")
    {
        textBox.BackColor = System.Drawing.Color.MistyRose;

        Clipboard.SetText(textBox.Text);

        // set 200ms timeout and then change BackColor
        //textBox.BackColor = System.Drawing.SystemColors.Window;
    }
}

How can I set a timeout? An example would be great.

Upvotes: 2

Views: 4099

Answers (3)

Sabrina_cs
Sabrina_cs

Reputation: 421

Supposed you have a textbox named test you can use the dispatcher timer in WPF or the Windows forms timer if you are working in windows forms.

            test.Background = new SolidColorBrush(Colors.MistyRose);

        Clipboard.SetText(test.Text);
        var dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
        dispatcherTimer.Tick += new EventHandler((s, x) =>
        {
            dispatcherTimer.Stop();
            test.Background = new SolidColorBrush(Colors.White);


        });

        dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0, 200);

        dispatcherTimer.Start();

Upvotes: 1

Equalsk
Equalsk

Reputation: 8194

Use a Timer and change colour back in the Elapsed event.

Quick and dirty (untested) code to get you started:

private void CopyToClipboard(TextBox textBox)
{
    if (textBox.Text != "")
    {
        textBox.BackColor = System.Drawing.Color.MistyRose;

        Clipboard.SetText(textBox.Text);

        // Create a timer with a 1 second interval.
        System.Timers.Timer aTimer = new System.Timers.Timer(1000);

        // Hook up the Elapsed event for the timer. 
        aTimer.Elapsed += OnTimedEvent;

        // Only tick one time
        aTimer.AutoReset = false;

        // Start timer
        aTimer.Enabled = true;
    }
}

private void OnTimedEvent(Object source, ElapsedEventArgs e)
{
    this.BeginInvoke((MethodInvoker)delegate
    {
        textBox.BackColor = System.Drawing.SystemColors.Window;
    });
}

Upvotes: 2

Sinatr
Sinatr

Reputation: 21979

Not sure if that fits to your requirements (beginner?), but that will do a simple blinking by using Task and invoking text color changing back after delay:

textBox.BackColor = Color.MistyRose;
Task.Run(() =>
{
    Thread.Sleep(200); // delay
    this.BeginInvoke((MethodInvoker)delegate
    {
        textBox.BackColor = SystemColors.Window;
    });
});

Upvotes: 2

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