Form change color

azzo stones

Hello guys ,it is a long time since i did some programming , and i really dont remember a thing, so i have to start C# all over again.
i have created a form with a button on it . when i click the button the form changes its color to Red. what i want to do now is that when i click the button again it changes its color to white and to make it keep changing from red to white at every click.any help how to do this please? thanks and regards.

8 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes15y ago
Accepted answer
To change from red to green and then to white:

private Color nextColor = Color.Red;

private void button1_Click(object sender, EventArgs e)
{
this.BackColor = nextColor;

if (nextColor == Color.Red)
{
nextColor = Color.Green;
}
else if (nextColor == Color.Green)
{
nextColor = Color.White;
}
else
{
nextColor = Color.Red;
}
}

Or, to do it using a counter:

private Color[] colors = new Color[]{Color.Red, Color.Green, Color.White};

private int counter = 0;

private void button1_Click(object sender, EventArgs e)
{
this.BackColor = colors[counter];
counter++;
if (counter >= colors.Length) counter = 0;
}
azzo stones15y ago
Thanks I will get myself a copy of this book. Great job.
Vulpes15y ago
The following is a good book for learning the C# language and includes some exercises.

http://www.amazon.com/3-0-Beginners-Guide-Herbert-Schildt/dp/0071588302

However, it doesn't cover the application of the language to Windows Forms and I don't know of any specialist book on the latter which does include any exercises.
azzo stones15y ago
Thanks again.your a diamond.I was just wondering maybe there is a good book with simple program exercises rodrick beginers that you might recommand?thangs again.
azzo stones15y ago
Just another 2 questions , if i would want my form to change to green after clicking again what should be done? and could be this done in another way for example by using a counter? would like to try both ways.thanks for your help.
azzo stones15y ago
Hi vulpes thanks for your reply. You are of great help as always.
Vulpes15y ago
Just thought of a better way to do it without using a field:

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
if (this.BackColor != Color.Red)
{
this.BackColor = Color.Red;
}
else
{
this.BackColor = Color.White;
}
}
}
Vulpes15y ago
You can do it like this:

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private Color nextColor = Color.Red;

private void button1_Click(object sender, EventArgs e)
{
this.BackColor = nextColor;
if (nextColor == Color.Red)
nextColor = Color.White;
else
nextColor = Color.Red;
}
}