Storing Info Between Events

Lost User

Maybe I was not clear but I was talking about a static class variable.

Luc Pattyn

As I can't get a local static to work in C# (as C/C++ would allow me to), I figured you meant a class member, but then I am puzzled as to why you want it to be static at all. And that is why I provided another answer to the OP, trying to state things more clearly. :)

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Lost User

Luc Pattyn wrote:

I am puzzled as to why you want it to be static at all

My C++ brain again ...

speaking as ...

Luc Pattyn

you should kickstart the brain that fits the forum. :-D

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Lost User

Even with a kick it's slow to react. :(

speaking as ...

Dave Kreskowiak

Same problem. I should have specified class scope statics.

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Dave Kreskowiak

ASPnoob

Hi Luc, thanks for replying. I have searched for a way to "put the state inside the button itself" like you have suggested but all I've found were maintaining session state for web apps and not windows form apps. I'm also interested in your suggestion to "hide the state in the Tag property" but I can't find an example of how to do that either. Please give me links to articles on how to do those things I've just mention if you can. Thanks again for your help.

Dave Kreskowiak

What's so hard about it??

SomeButton.Tag = _stateValue_;

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Dave Kreskowiak

Luc Pattyn

And the harder half of the job is getting the state back, which requires a cast as I said:

int myState=(int)myControl.Tag;

And no, I don't have a reference about this subject. Inheriting from a class, or creating a more specialized one, is a fundamental concept in Object-Oriented Programming. There are zillions of articles on the subject, why not try and read Custom Button - Issues with Focus Border, Text Color, etc.[^] (I didn't, it was the first I found using CP search). :)

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Luc Pattyn

(Sorry for a garbage sentence meant to fool the CP bugs and cache issues so I can get this posted) And the harder half of the job is getting the state back, which requires a cast as I said:

int myState=(int)myControl.Tag;

And no, I don't have a reference about this subject. Inheriting from a class, or creating a more specialized one, is a fundamental concept in Object-Oriented Programming. There are zillions of articles on the subject, why not try and read Custom Button - Issues with Focus Border, Text Color, etc.[^] (I didn't, it was the first I found using CP search). :)

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Luc Pattyn

(Another garbage sentence was needed to get this post accepted amidst bugs and cache issues, sorry for that) And the harder half of the job is getting the state back, which requires a cast as I said:

int myState=(int)myControl.Tag;

And no, I don't have a reference about this subject. Inheriting from a class, or creating a more specialized one, is a fundamental concept in Object-Oriented Programming. There are zillions of articles on the subject, why not try and read Custom Button - Issues with Focus Border, Text Color, etc.[^] (I didn't, it was the first I found using CP search). :)

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ignrod

Sorry for the delay. If you want to keep number of clicks inside the button, all you have to do is subclass Button class and add a field with the number of clicks. Then, override the OnClick method to increase the number of clicks by one every time the button is clicked. Don't forget to call the parent OnClick so that the normal button click behavior is executed. You have an example below.

using System;
using System.Drawing;
using System.Windows.Forms;

class CountClickButton : Button {

int clickCount; // Number of clicks

public CountClickButton() {
	clickCount = 0;
}

// OnClick is called when the button is clicked. It must increase clickCount by one
// and then execute the event handlers (which is done when base.OnClick
// is executed).
protected override void OnClick(EventArgs e) {
	clickCount = clickCount + 1;
	base.OnClick(e);
}

// Only allow other classes to read number of clicks. Number of clicks cannot be
// modified by other classes.
public int ClickCount {
	get {
		return clickCount;
	}
}

}

class CountClickForm : Form {

CountClickButton b;

public CountClickForm() {
	b = new CountClickButton();
	b.Text = "Click me!";
	b.Size = b.PreferredSize;
	ClientSize = new Size(700, 400); // Should be big enough. Fit to your own needs.
	b.Left = (ClientSize.Width - b.Width) / 2;
	b.Top = (ClientSize.Height - b.Height) / 2;
	b.Click += new EventHandler(b\_clicked);
	Controls.Add(b);
	Text = "I count clicks!";
}

// b\_clicked is registered as an event. It will be executed when button is clicked,
// after number of clicks is increased by one.
void b\_clicked(object sender, EventArgs e) {
	string text = String.Format("Button has been clicked {0} times.", b.ClickCount);
	if (b.ClickCount < 1) { 
		// This should never happen.
		text = "Sorry, I was drunk when programming this. Cheers!!";
	}
	if (b.ClickCount == 1) {
		text = "Button has been clicked once.";
	}
	if (b.ClickCount == 2) {
		text = "Button has been clicked twice.";
	}
	Text = text;
}
	
\[STAThreadAttribute\]
static void Main() {
	Application.Run(new CountClickForm());
}

}