How can i create one button for two events in C# 2008 vs?

[Wayne Gaylard]

OK, my error, I assumed you were using WPF not WinForms,. Here is the correct version

private void Start(object sender, EventArgs e)
{
button1.Click -= new EventHandler(Start);
button1.Click += new EventHandler(Stop);
button1.Text = "Stop";
}
private void Stop(object sender, EventArgs e)
{
button1.Click -= new EventHandler(Stop);
button1.Click += new EventHandler(Start);
button1.Text = "Start";
}

Sorry about that!

...and I have extensive experience writing computer code, including OIC, BTW, BRB, IMHO, LMAO, ROFL, TTYL.....

[Lost User]

A singe event with an if statement should solve your purpose. Why do you need two events?

private void button1_click(object sender, EvenArgs e) {
if (button1.Text == "Start") {
button1.Text = "Stop";
//Start the job
} else {
button1.Text = "Start";
//Stop the job
}
}

I am assuming that you're doing the job in a different thread or a BackgroundWorker.

[Subin Mavunkal]

I was thinking the same.Write two methods and handle it in that single event click.

[Tony Richards]

As an aside (ish): Please please please don't use the button text to work out what state you're in, use something like a boolean member variable instead (or, if you absolutly must use a property on the button, something like the Tag property). The code snippet you've given will break as soon as you try to localise your application, and just really isn't good practice. Something like:

private bool started = false;

private void button1_click(object sender, EventArgs e) {
if (!started) {
button1.Text = "Stop";
// Start the job
// ...

    started = true;
}
else {
    button1.Text = "Start";
    // Stop the job
    // ...

    started = false;
}

}

Also, if you're working in a different thread, don't forget cross-thread access issues.

[Lost User]

I know that Tony, I was just giving him a heads up on where to start. His question was very basic and I did not want to confuse him with the specifics. Anyway, thanks for the tip.

[PIEBALDconsult]

I've done that, I won't do it again; I'd create two Buttons but have only one visible at a time.

[Wayne Gaylard]

Can you tell us why ?

...and I have extensive experience writing computer code, including OIC, BTW, BRB, IMHO, LMAO, ROFL, TTYL.....

[J4amieC]

Wayne Gaylard wrote:

Can you tell us why ?

Because its just a better way of doing it. Because it avoids the previously mentioned problem of using the button's text to determine what to do, with all the inherant problems associated with using this method. Because the 2 buttons do a different job and therefore should not be the same button (separation of concern) I could go on.

[BobJanova]

If you're going to use the localisation argument then surely you should set the button text to resource strings ;) I like to use Tag for this, unless I am already using it for something else, as it really is a property of the button and should be stored with it. Of course in most cases the button is controlling the state of some business object and you should check that instead:

private Task someBigJob;

private void button1_click(object sender, EventArgs e) {
if (someBigJob == null || !someBigJob.Running) {
button1.Text = "Stop";
// Start the job
someBigJob.Start();
}
else {
button1.Text = "Start";
// Stop the job
someBigJob.Stop();
}
}

(for the benefit of the OP, I'm sure you know already!)

[BobJanova]

Now this is an interesting thread. I don't agree with you that it's a better way to do it, because it comes with other problems (you have to manually place two buttons in the same place, make them the same size, tab order and keyboard mnemonic, etc). If you want to have it look like one button, then make it one button. (Of course a Start and Stop button next to each other is also acceptable.) I would say that the button does one single job: it toggles the state of the underlying thing that is being started or stopped. Logically, one might make it a check box, but users don't expect that.

[Lost User]

J4amieC wrote:

Because its just a better way of doing it.

It's just a different way of doing it. There's this thing called a ToggleButton[^]. I wouldn't use a button, but a checkbox. Makes it clear to the user that there are two different states, and that it toggles.

J4amieC wrote:

Because the 2 buttons do a different job and therefore should not be the same button (separation of concern)

If they're calling the same method, one with a boolean "true" and the other with "false"? The world isn't that black-and-white.

Bastard Programmer from Hell :suss:

[PIEBALDconsult]

I could, but J4amieC did a good enough job.

[FeniksReborn]

thank you solve my problem with this: If (txtstart.text="OK") { do somthing } else if (txtstart.text="Stop") { application.close(); }

[PIEBALDconsult]

That's bogus. X|