using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
public class Form1 : System.Windows.Forms.Form {
ArrayList knownColorList = new ArrayList();
ArrayList knownColorNameList = new ArrayList();
public Form1() {
NonSystemColors(knownColorList, knownColorNameList);
}
[STAThread]
static void Main() {
Application.Run(new Form1());
}
private void NonSystemColors(ArrayList knownColorList, ArrayList knownColorNameList) {
Array cA = Enum.GetValues(typeof(KnownColor));
foreach (KnownColor knwnC in cA) {
Color curC = Color.FromKnownColor(knwnC);
if (!curC.IsSystemColor) {
knownColorList.Add(curC);
knownColorNameList.Add(curC.Name.ToString());
}
}
}
protected override void OnPaint(PaintEventArgs pea) {
Graphics g = pea.Graphics;
int wi = 70, hi = 12, rectNb = 8;
int count = knownColorList.Count;
this.Width = (wi + 2) * rectNb + 9;
int y = (int)(count / rectNb);
this.Height = y * (2 + hi) + 60;
DisplayKnownColors(g, count, wi, hi, rectNb);
g.Dispose();
}
private void DisplayKnownColors(Graphics g, int count, int wi, int hi, int rectNb) {
Rectangle rec;
Pen p = new Pen(this.ForeColor);
Brush b;
StringFormat strfmt = new StringFormat();
strfmt.LineAlignment = strfmt.Alignment = StringAlignment.Near;
int x, y;
for (int i = 0; i < count; i++) {
x = (int)(i % rectNb);
y = (int)(i / rectNb);
rec = new Rectangle(1 + x * (2 + wi), 1 + y * (2 + hi), wi, hi);
g.DrawRectangle(p, rec);
b = new SolidBrush((Color)knownColorList[i]);
g.FillRectangle(b, rec);
b = new SolidBrush(Color.Black);
g.DrawString((string)knownColorNameList[i], this.Font, b, rec, strfmt);
}
}
}