I'm trying to make a form invisible for x amount of time in c#. Any ideas?
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4 Answers
BFree has posted similar code in the time it took me to test this, but here's my attempt:
this.Hide();
var t = new System.Windows.Forms.Timer
{
Interval = 3000 // however long you want to hide for
};
t.Tick += (x, y) => { t.Enabled = false; this.Show(); };
t.Enabled = true;
2 Comments
ctacke
Timers implement IDisposable, you should be calling it.
Matt Hamilton
I suppose you could call Dispose() manually from within the event handler, but you couldn't wrap it in a using() block or the timer would be disposed before it got a chance to fire, three seconds later.
Quick and dirty solution taking advantage of closures. No Timer required!
private void Invisibilize(TimeSpan Duration)
{
(new System.Threading.Thread(() => {
this.Invoke(new MethodInvoker(this.Hide));
System.Threading.Thread.Sleep(Duration);
this.Invoke(new MethodInvoker(this.Show));
})).Start();
}
Example:
// Makes form invisible for 5 seconds.
Invisibilize(new TimeSpan(0, 0, 5));
Comments
At the class level do something like this:
Timer timer = new Timer();
private int counter = 0;
In the constructor do this:
public Form1()
{
InitializeComponent();
timer.Interval = 1000;
timer.Tick += new EventHandler(timer_Tick);
}
Then your event handler:
void timer_Tick(object sender, EventArgs e)
{
counter++;
if (counter == 5) //or whatever amount of time you want it to be invisible
{
this.Visible = true;
timer.Stop();
counter = 0;
}
}
Then wherever you want to make it invisible (I'll demonstrate here on a button click):
private void button2_Click(object sender, EventArgs e)
{
this.Visible = false;
timer.Start();
}
Comments
Bear in mind there are several types of timers available: http://msdn.microsoft.com/en-us/magazine/cc164015.aspx
And don't forget to disable the timer for the duration of the handler, lest you interrupt your self. Rather embarrassing.
