using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form { protected override void OnPaint(PaintEventArgs e) { Graphics g = e.Graphics; g.FillRectangle(Brushes.White, this.ClientRectangle); Color c1 = Color.FromArgb(100, Color.Blue); Color c2 = Color.FromArgb(50, Color.Green); g.FillEllipse(Brushes.Red, 20, 20, 80, 80); g.FillRectangle(new SolidBrush(c1), 60, 80, 60, 60); Point[] pa = new Point[] { new Point(150, 40), new Point(90, 40), new Point(90, 120)}; g.FillPolygon(new SolidBrush(c2), pa); } public static void Main() { Application.Run(new Form1()); } }
Author: coder
Five yellow squares with different alpha values(Transparensy)
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 { [STAThread] static void Main() { Application.Run(new Form1()); } protected override void OnPaint(PaintEventArgs e) { Graphics g; g = Graphics.FromHwnd(this.Handle); g.FillRectangle(new SolidBrush(Color.Red), 10, 10, 210, 50); // Rectangle r = new Rectangle(40, 20, 30, 30); Color c = Color.FromArgb(255, 255, 255, 0); g.FillRectangle(new SolidBrush(c), r); r.Offset(30, 0); c = Color.FromArgb(200, 255, 255, 0); g.FillRectangle(new SolidBrush(c), r); r.Offset(30, 0); c = Color.FromArgb(150, 255, 255, 0); g.FillRectangle(new SolidBrush(c), r); r.Offset(30, 0); c = Color.FromArgb(100, 255, 255, 0); g.FillRectangle(new SolidBrush(c), r); r.Offset(30, 0); c = Color.FromArgb(50, 255, 255, 0); g.FillRectangle(new SolidBrush(c), r); g.Dispose(); } }
Known Colors
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace KnownColors
{
///
///
public class KnownColors : System.Windows.Forms.Form
{
private System.Windows.Forms.ComboBox comboBox1;
///
///
private System.ComponentModel.Container components = null;
ArrayList cAL;
ArrayList cNAL;
public KnownColors()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
this.Text = “Known non-system colors”;
cAL = new ArrayList(); // colors
cNAL = new ArrayList(); // strings
NonSystemColors(cAL, cNAL);
this.comboBox1.Sorted = true;
this.comboBox1.DataSource = cNAL; //set the combo's data source
//
// TODO: Add any constructor code after InitializeComponent call
//
}
///
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
///
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
this.comboBox1 = new System.Windows.Forms.ComboBox();
this.SuspendLayout();
//
// comboBox1
//
this.comboBox1.Location = new System.Drawing.Point(8, 8);
this.comboBox1.Name = “comboBox1”;
this.comboBox1.Size = new System.Drawing.Size(121, 21);
this.comboBox1.TabIndex = 0;
this.comboBox1.Text = “comboBox1”;
//
// KnownColors
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.comboBox1});
this.Name = “KnownColors”;
this.Text = “KnownColors”;
this.ResumeLayout(false);
}
#endregion
///
///
[STAThread]
static void Main()
{
Application.Run(new KnownColors());
}
private void NonSystemColors(ArrayList cAL, ArrayList cNAL)
{
Array cA = Enum.GetValues(typeof(KnownColor));
foreach(KnownColor knwnC in cA) // cX.Length = 167
{
Color curC = Color.FromKnownColor(knwnC);
if(!curC.IsSystemColor)
{
cAL.Add(curC);
cNAL.Add(curC.Name.ToString());
}
}
}
protected override void OnPaint(PaintEventArgs pea)
{
Graphics g = pea.Graphics;
int wi = 70, hi = 12, rectNb = 8;
int cALNb = cAL.Count;
this.Width = (wi +2)*rectNb + 9;
int y = (int)(cALNb / rectNb);
this.Height = y*(2 + hi) + 60;
DisplayKnownColors(g, cALNb, wi, hi, rectNb);
g.Dispose();
}
private void DisplayKnownColors(Graphics g, int cALNb, 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 < cALNb; 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)cAL[i]);
g.FillRectangle(b, rec);
b = new SolidBrush(Color.Black);
g.DrawString((string)cNAL[i], this.Font, b, rec, strfmt);
}
x = (int)(cALNb % rectNb);
y = (int)(cALNb / rectNb);
this.comboBox1.Location = new Point(x*(wi + 2) + 2, y*(2 + hi) + 2);
}
}
}
[/csharp]
Color Changer
using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace ColorChanger { public class ColorChanger : System.Windows.Forms.Form { internal System.Windows.Forms.Label lblSaturation; internal System.Windows.Forms.Label lblHue; internal System.Windows.Forms.Label lblBrightness; internal System.Windows.Forms.Label Label1; internal System.Windows.Forms.ListBox lstColors; private System.ComponentModel.Container components = null; public ColorChanger() { InitializeComponent(); } protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code private void InitializeComponent() { this.lblSaturation = new System.Windows.Forms.Label(); this.lblHue = new System.Windows.Forms.Label(); this.lblBrightness = new System.Windows.Forms.Label(); this.Label1 = new System.Windows.Forms.Label(); this.lstColors = new System.Windows.Forms.ListBox(); this.SuspendLayout(); this.lblSaturation.BackColor = System.Drawing.SystemColors.ActiveCaptionText; this.lblSaturation.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.lblSaturation.FlatStyle = System.Windows.Forms.FlatStyle.System; this.lblSaturation.Location = new System.Drawing.Point(264, 56); this.lblSaturation.Name = "lblSaturation"; this.lblSaturation.Size = new System.Drawing.Size(136, 20); this.lblSaturation.TabIndex = 9; this.lblSaturation.Text = " Saturation"; this.lblHue.BackColor = System.Drawing.SystemColors.ActiveCaptionText; this.lblHue.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.lblHue.FlatStyle = System.Windows.Forms.FlatStyle.System; this.lblHue.Location = new System.Drawing.Point(264, 32); this.lblHue.Name = "lblHue"; this.lblHue.Size = new System.Drawing.Size(136, 20); this.lblHue.TabIndex = 8; this.lblHue.Text = " Hue"; this.lblBrightness.BackColor = System.Drawing.SystemColors.ActiveCaptionText; this.lblBrightness.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.lblBrightness.FlatStyle = System.Windows.Forms.FlatStyle.System; this.lblBrightness.Location = new System.Drawing.Point(264, 8); this.lblBrightness.Name = "lblBrightness"; this.lblBrightness.Size = new System.Drawing.Size(136, 20); this.lblBrightness.TabIndex = 7; this.lblBrightness.Text = " Brightness"; this.Label1.BackColor = System.Drawing.SystemColors.ActiveCaptionText; this.Label1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle; this.Label1.FlatStyle = System.Windows.Forms.FlatStyle.System; this.Label1.Location = new System.Drawing.Point(8, 8); this.Label1.Name = "Label1"; this.Label1.Size = new System.Drawing.Size(200, 20); this.Label1.TabIndex = 6; this.Label1.Text = " Choose a Background Color:"; this.lstColors.Location = new System.Drawing.Point(8, 36); this.lstColors.Name = "lstColors"; this.lstColors.Size = new System.Drawing.Size(200, 238); this.lstColors.TabIndex = 5; this.lstColors.SelectedIndexChanged += new System.EventHandler(this.lstColors_SelectedIndexChanged); this.AutoScaleBaseSize = new System.Drawing.Size(5, 14); this.ClientSize = new System.Drawing.Size(472, 290); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.lblSaturation, this.lblHue, this.lblBrightness, this.Label1, this.lstColors}); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.Name = "ColorChanger"; this.Text = "Color Changer"; this.Load += new System.EventHandler(this.ColorChanger_Load); this.ResumeLayout(false); } #endregion [STAThread] static void Main() { Application.Run(new ColorChanger()); } private void ColorChanger_Load(object sender, System.EventArgs e) { string[] colorNames; colorNames = System.Enum.GetNames(typeof(KnownColor)); lstColors.Items.AddRange(colorNames); } private void lstColors_SelectedIndexChanged(object sender, System.EventArgs e) { KnownColor selectedColor; selectedColor = (KnownColor)System.Enum.Parse(typeof(KnownColor), lstColors.Text); this.BackColor = System.Drawing.Color.FromKnownColor(selectedColor); lblBrightness.Text = "Brightness = " +this.BackColor.GetBrightness().ToString(); lblHue.Text = "Hue = " + this.BackColor.GetHue().ToString(); lblSaturation.Text = "Saturation = " + this.BackColor.GetSaturation().ToString(); } } }
All the colors that are supported in C# according
//ColorGuide.cs /* This Program will generate all the colors that are supported in C# according to the Name.... I expected from you a better version of this program If you can , then inform me how you made it e.g. you make a dll file where the whole color array is stored then your coding lines will decrease. I tried that way but the trial was in vane.... */ using System; using System.Windows.Forms; using System.Drawing; public class CreateMyPanel : Form { Color[] color = new Color[]{ Color.AliceBlue, Color.AntiqueWhite, Color.Aqua, Color.Aquamarine, Color.Azure, Color.Beige, Color.Bisque, Color.Black, Color.BlanchedAlmond,Color.Blue, Color.BlueViolet,Color.Brown, Color.BurlyWood, Color.CadetBlue, Color.Chartreuse,Color.Chocolate, Color.Coral, Color.Cornsilk,Color.Crimson, Color.Cyan, Color.DarkBlue, Color.DarkCyan,Color.DarkGoldenrod, Color.DarkGray, Color.DarkGreen, Color.DarkKhaki,Color.DarkMagenta, Color.DarkOliveGreen,Color.DarkOrange,Color.DarkOrchid,Color.DarkRed, Color.DarkSalmon,Color.DarkSeaGreen,Color.DarkSlateBlue,Color.DarkSlateGray, Color.DarkTurquoise,Color.DarkViolet,Color.DeepPink,Color.DeepSkyBlue, Color.DimGray,Color.DodgerBlue,Color.Firebrick,Color.FloralWhite, Color.ForestGreen,Color.Fuchsia,Color.Gainsboro,Color.GhostWhite, Color.Gold,Color.Goldenrod,Color.Gray,Color.Green,Color.GreenYellow, Color.Honeydew,Color.HotPink,Color.IndianRed,Color.Indigo, Color.Ivory,Color.Khaki,Color.Lavender,Color.LavenderBlush, Color.LawnGreen,Color.LemonChiffon,Color.LightBlue,Color.LightCoral, Color.LightCyan,Color.LightGoldenrodYellow,Color.LightGray, Color.LightGreen,Color.LightPink,Color.LightSalmon,Color.LightSeaGreen, Color.LightSkyBlue,Color.LightSlateGray,Color.LightSteelBlue, Color.LightYellow,Color.Lime,Color.LimeGreen,Color.Linen, Color.Magenta,Color.Maroon,Color.MediumAquamarine,Color.MediumBlue, Color.MediumOrchid,Color.MediumPurple,Color.MediumSeaGreen, Color.MediumSlateBlue,Color.MediumSpringGreen,Color.MediumTurquoise, Color.MediumVioletRed,Color.MidnightBlue,Color.MintCream,Color.MistyRose, Color.Moccasin,Color.NavajoWhite,Color.Navy,Color.OldLace, Color.Olive,Color.OliveDrab,Color.Orange,Color.OrangeRed, Color.Orchid,Color.PaleGoldenrod,Color.PaleGreen,Color.PaleTurquoise, Color.PaleVioletRed,Color.PapayaWhip,Color.PeachPuff,Color.Peru, Color.Pink,Color.Plum,Color.PowderBlue,Color.Purple,Color.Red, Color.RosyBrown,Color.RoyalBlue,Color.SaddleBrown,Color.Salmon, Color.SandyBrown,Color.SeaGreen,Color.SeaShell,Color.Sienna,Color.Silver, Color.SkyBlue,Color.SlateBlue,Color.SlateGray,Color.Snow, Color.SpringGreen,Color.SteelBlue,Color.Tan,Color.Teal, Color.Thistle,Color.Tomato,Color.Transparent,Color.Turquoise, Color.Violet,Color.Wheat,Color.White,Color.WhiteSmoke,Color.Yellow, Color.YellowGreen }; private Panel panel1 = new Panel(); private Label[] col = new Label[140]; public CreateMyPanel() { // Initialize the Panel control. panel1.Location = new Point(ClientRectangle.Left + 5,ClientRectangle.Top + 5); panel1.Size = new Size(ClientRectangle.Right-5, ClientRectangle.Bottom-5); panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D; this.Controls.Add(panel1); // Add the Panel control to (inside) the form. // Initalize the Label controls. int ystart = ClientRectangle.Top; for(int j=0; j<140; j++) col[j] = new Label(); for(int i = 0; i<140; i++) { col[i].Size = new Size(ClientRectangle.Right, 20); col[i].Font = new System.Drawing.Font("Comic Sans MS",10,FontStyle.Bold); col[i].ForeColor = Color.Black; if(col[i].Equals(Color.Black) == true) { col[i].ForeColor = Color.White; } col[i].Text = color[i].ToString(); col[i].Location = new Point(ClientRectangle.Left,ystart); col[i].BackColor = color[i]; col[i].BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D; panel1.Controls.Add(col[i]); // Add the Label controls to (inside) the Panel. if((col[i].Location.Y > panel1.Location.Y)) { panel1.AutoScroll = true; } ystart += 20; } this.Size = new Size(315, 300); this.Text = "A Color Guide - JAYANT"; this.MaximizeBox = false; // this.BorderStyle = FormBorderStyle.FixedDialog; this.StartPosition = FormStartPosition.CenterScreen; } public static void Main() { Application.Run(new CreateMyPanel()); } } /* To Compile :---- csc /r:System.dll /r:System.Drawing.dll /r:System.Windows.Forms.dll /r:Microssft.Win32.InterOp.dll /out:ColorGuide.exe Colorguide.cs */
Filled with the semi transparent and transparent color
using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; public class Form1 : System.Windows.Forms.Form { public Form1() { InitializeComponent(); } private void InitializeComponent() { this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(292, 273); this.Text = ""; this.Resize += new System.EventHandler(this.Form1_Resize); this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint); } static void Main() { Application.Run(new Form1()); } private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { Graphics g = e.Graphics; g.FillRectangle(Brushes.White, this.ClientRectangle); Color c1 = Color.FromArgb(100, Color.Blue); Color c2 = Color.FromArgb(50, Color.Green); g.FillEllipse(Brushes.Red, 20, 20, 80, 80); g.FillRectangle(new SolidBrush(c1), 60, 80, 60, 60); Point[] pa = new Point[] { new Point(150, 40), new Point(90, 40), new Point(90, 120)}; g.FillPolygon(new SolidBrush(c2), pa); } private void Form1_Resize(object sender, System.EventArgs e) { Invalidate(); } }
Draw each of 100 cells with randomly chosen colors
using System;
using System.Drawing;
using System.Windows.Forms;
public class ColorChips : Form {
public ColorChips() {
Size = new Size(300,300);
Text = “Color Chips”;
}
protected override void OnPaint(PaintEventArgs e) {
Graphics g = e.Graphics;
int h = DisplayRectangle.Height;
int w = DisplayRectangle.Width;
Random r = new Random();
for (int i = 0; i < 10; i++){ for (int j = 0; j < 10; j++) { Color color = Color.FromArgb (r.Next(256), r.Next(256), r.Next(256)); Brush brush = new SolidBrush(color); g.FillRectangle(brush, i*w/10, j*h/10, w/10, h/10); } } base.OnPaint(e); } static void Main() { Application.Run(new ColorChips()); } } [/csharp]