In C# i have a picturebox. i would like to draw 4 colors. The default will be white, red, green, blue. How do i draw these 4 colors stritched in this picbox? or should i have 4
If you want to use non-predefined colors, then you need to get a Color object from the static method Color.FromArgb().
int r = 100;
int g = 200;
int b = 50;
Color c = Color.FromArgb(r, g, b);
Brush brush = new SolidBrush(c);
//...
Best Regards
Oliver Hanappi
Add a PictureBox to the form, create an event handler for the paint event, and make it look like this:
private void PictureBox_Paint(object sender, PaintEventArgs e)
{
int width = myPictureBox.ClientSize.Width / 2;
int height = myPictureBox.ClientSize.Height / 2;
Rectangle rect = new Rectangle(0, 0, width, height);
e.Graphics.FillRectangle(Brushes.White, rect);
rect = new Rectangle(width, 0, width, height);
e.Graphics.FillRectangle(Brushes.Red, rect);
rect = new Rectangle(0, height, width, height);
e.Graphics.FillRectangle(Brushes.Green, rect);
rect = new Rectangle(width, height, width, height);
e.Graphics.FillRectangle(Brushes.Blue, rect);
}
This will divide the surface into 4 rectangles and paint each of them in the colors White, Red, Green and Blue.
You need to specify what it is you would specifically like to draw. You can't draw a red - that makes no sense. You can, however, draw a red rectangle at location (0,0) which is 100 pixels tall and 100 wide. I will answer what I can, however.
If you want to set the outline of a shape to a specific color, you would create a Pen object. If you want to fill a shape with a color, however, then you would use a Brush object. Here's an example of how you would draw a rectangle filled with red, and a rectangle outlined in green:
private void pictureBox_Paint(object sender, PaintEventArgs e)
{
Graphics graphics = e.Graphics;
Brush brush = new SolidBrush(Color.Red);
graphics.FillRectangle(brush, new Rectangle(10, 10, 100, 100));
Pen pen = new Pen(Color.Green);
graphics.DrawRectangle(pen, new Rectangle(5, 5, 100, 100));
}