using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class TriangleGradientBrush: Form
{
     public static void Main()
     {
          Application.Run(new TriangleGradientBrush());
     }
     public TriangleGradientBrush()
     {
          ResizeRedraw = true;
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }       
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          Point[] apt  = { new Point(cx,  0),
                           new Point(cx, cy),
                           new Point(0,  cy) };
   
          PathGradientBrush pgbrush = new PathGradientBrush(apt);
   
          grfx.FillRectangle(pgbrush, 0, 0, cx, cy);
     }
}

    

   
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;

using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        GraphicsPath gp = new GraphicsPath();

        gp.AddLine(10, 10, 110, 15);
        gp.AddLine(110, 15, 100, 96);
        gp.AddLine(100, 96, 15, 110);
        gp.CloseFigure();

        g.FillRectangle(Brushes.White, this.ClientRectangle);
        g.SmoothingMode = SmoothingMode.AntiAlias;

        PathGradientBrush pgb = new PathGradientBrush(gp);
        pgb.CenterColor = Color.White;
        pgb.SurroundColors = new Color[] { Color.Blue };
        g.FillPath(pgb, gp);

        g.DrawPath(Pens.Black, gp);
        pgb.Dispose();
        gp.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

    

   

       
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class TestGDI2 : System.Windows.Forms.Form{
    
    //in order to paint something OnPaint method needs to be overridden
    
    protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe) {
        //OnPaint method is a member of Form class 
        //The following call sends pe to an event listener Graphics
        base.OnPaint(pe);
        
        Graphics g = pe.Graphics;
        g.FillRectangle(new SolidBrush(Color.White), ClientRectangle);
        GraphicsPath path = new GraphicsPath(new Point[] {
        new Point(40, 140), new Point(275, 200),
        new Point(105, 225), new Point(190, 300),
        new Point(50, 350), new Point(20, 180), },
        
        new byte[] {
            (byte)PathPointType.Start,
            (byte)PathPointType.Bezier,
            (byte)PathPointType.Bezier,
            (byte)PathPointType.Bezier,
            (byte)PathPointType.Line,
            (byte)PathPointType.Line,
        });

        PathGradientBrush pgb = new PathGradientBrush(path);
        pgb.SurroundColors = new Color[] { Color.Green,Color.Yellow,Color.Red, 
                                            Color.Blue,Color.Orange, Color.White, 
                                          };
        g.FillPath(pgb, path);
    }
    public static void Main() {
        System.Windows.Forms.Application.Run(new TestGDI2());//display form
    }
}




           
          

   

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;

public class Form1 : System.Windows.Forms.Form{
  private System.ComponentModel.Container components = null;

  public Form1()
  {
    InitializeComponent();
  }

  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }

    protected override void OnPaint (PaintEventArgs e) {
         GraphicsPath path;
         path = new GraphicsPath(new Point[]{ new Point(10, 10),
                                               new Point(50, 10),
                                               new Point(20, 150),
                                               new Point(10, 50),
                                               new Point(200, 160)}, 
            new byte[] {(byte)PathPointType.Start,
                          (byte)PathPointType.Line,
                          (byte)PathPointType.Line,
                          (byte)PathPointType.Line,
                          (byte)PathPointType.Line });
         e.Graphics.DrawPath(Pens.Black, path);
    }
  private void InitializeComponent() {
      this.components = new System.ComponentModel.Container();
    this.Size = new System.Drawing.Size(300,300);
    this.Text = "Form1";
  }
  static void Main() {
    Application.Run(new Form1());
  }
}



           
          

   

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald

Publisher: Apress
ISBN: 1590590457
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace GDI_Basics
{
    /// <summary>
    /// Summary description for GraphicsPathExample.
    /// </summary>
    public class GraphicsPathExample : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public GraphicsPathExample()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            // 
            // GraphicsPathExample
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Name = "GraphicsPathExample";
            this.Text = "GraphicsPathExample";
            this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.GraphicsPathExample_MouseDown);
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.GraphicsPathExample_Paint);

        }
        #endregion


        [STAThread]
        static void Main() 
        {
            Application.Run(new GraphicsPathExample());
        }

        GraphicsPath path;

        private void GraphicsPathExample_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
            path = new GraphicsPath();
            path.StartFigure();
            path.AddArc(10, 10, 100, 100, 20, 50);
            path.AddLine(20, 50, 70, 230);
            path.CloseFigure();
            path.AddEllipse(120, 50, 80, 80);
            e.Graphics.FillPath(Brushes.White, path);
            e.Graphics.DrawPath(Pens.Black, path);
        }

        private void GraphicsPathExample_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            if (path.IsVisible(e.X, e.Y))
            {
                MessageBox.Show("You clicked inside the figure.");
            }

        }
    }
}



           
          

   
 

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
   
class LineArcPath: Form
{
     public static void Main()
     {
          Application.Run(new LineArcPath());
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }      
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          GraphicsPath path = new GraphicsPath();
          Pen          pen  = new Pen(clr, 25);
   
          path.AddLine( 25, 100, 125, 100);
          path.AddArc (125,  50, 100, 100, -180, 180);
          path.AddLine(225, 100, 325, 100);
   
          grfx.DrawPath(pen, path);
     }
}

    

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

class Flower: Form
{
public static void Main()
{
Application.Run(new Flower());
}
public Flower()
{
ResizeRedraw = true;
}
protected override void OnPaint(PaintEventArgs pea)
{
DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
}
protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
{

float fScale = Math.Min(cx, cy) / 200f;
grfx.TranslateTransform(cx / 2, cy / 2);
grfx.ScaleTransform(fScale, fScale);

GraphicsPath path = new GraphicsPath();

path.AddBezier(new Point( 0, 0), new Point(125, 125),
new Point(75, 15), new Point(600, 0));

for (int i = 0; i < 8; i++) { grfx.FillPath(Brushes.Red, path); grfx.DrawPath(Pens.Black, path); grfx.RotateTransform(360 / 8); } Rectangle rect = new Rectangle(-150, -150, 300, 300); grfx.FillEllipse(Brushes.Yellow, rect); grfx.DrawEllipse(Pens.Black, rect); } } [/csharp]