A very easy question to answer

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1.00/5 (1 vote)

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This is probably one of the most stupid questions ever asked. Okay, so I have a form:

C#

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

namespace Whatever 
{
    public class Form1 : Form
    {
        public Form1
        {
            InitializeComponent();
            Graphics g = CreateGraphics();
            g.Clear(Color.Black);
            g.FillRectangle(Brushes.Tan, 0, 0, 20, 50);
        }
    }
}

No matter what I do nothing will be drawn on the screen

As I said this is probably a stupid question but hey it will give you some extra points.

Posted 1-Jul-13 12:29pm

Curtdawg99

Updated 1-Jul-13 14:58pm

v2

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Ron Beyer · Accepted Answer · 2013-07-01T12:31:00

Solution 1

Override the OnPaint method (protected override OnPaint(... )

Then put your drawing code in there, the OnPaint method has a paint event args that includes a reference to the graphics object, so you don't need to create it separately.

C#

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

    protected override void OnPaint(PaintEventArgs e)
    {
        Graphics g = e.Graphics;
        g.Clear(Color.Black);
        g.FillRectangle(Brushes.Red, 0, 0, 20, 50);

    }
}

Form.OnPaint MSDN[^]

BTW, you are clearing the graphics with "Black" then painting a black rectangle, so you would never see it. I changed the color to red and you will see the background now black with a red rectangle on it.

Posted 1-Jul-13 12:31pm

Ron Beyer

Updated 1-Jul-13 12:45pm

v5

Comments

Curtdawg99 1-Jul-13 18:40pm

can u go in2 more detail

Ron Beyer 1-Jul-13 18:45pm

I updated the solution.

Sergey Alexandrovich Kryukov 1-Jul-13 19:30pm

Of course, a 5.
—SA

Ron Beyer 1-Jul-13 19:39pm

Thanks Sergey.

Curtdawg99 1-Jul-13 20:58pm

Thank you so much!!!

Sergey Alexandrovich Kryukov 1-Jul-13 21:13pm

Will you accept Ron's answer formally (green button)? It's a correct one.
—SA

Curtdawg99 4-Jul-13 13:37pm

Sorry, yah I thought did. ;P