Csharp/CSharp Tutorial/2D/Pens

A custom dashed Pen

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class PenDashedDot : System.Windows.Forms.Form
{
  private System.ruponentModel.Container components = null;
  public PenDashedDot()
  {
    InitializeComponent();
    SetStyle(ControlStyles.ResizeRedraw, true);
  }
  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
  private void InitializeComponent()
  {
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 273);
    this.Paint += new System.Windows.Forms.PaintEventHandler(this.PenDashedDot_Paint);
  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new PenDashedDot());
  }
  private void PenDashedDot_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    Pen customDashPen = new Pen(Color.BlueViolet, 5);
    float[] myDashes = {5.0f, 2.0f, 1.0f, 3.0f};
    customDashPen.DashPattern = myDashes;
    g.DrawRectangle(customDashPen, ClientRectangle);
  
  }
}

All LineCap Demo

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class LineCapDemo : System.Windows.Forms.Form
{
  private System.ruponentModel.Container components = null;
  public LineCapDemo()
  {
    InitializeComponent();
  }
  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
  private void InitializeComponent()
  {
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 273);
    this.Resize += new System.EventHandler(this.LineCapDemo_Resize);
    this.Paint += new System.Windows.Forms.PaintEventHandler(this.LineCapDemo_Paint);
  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new LineCapDemo());
  }
  private void LineCapDemo_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    Pen thePen = new Pen(Color.Black, 10);
    int yOffSet = 10;
    Array obj = Enum.GetValues(typeof(LineCap));
    for(int x = 0; x < obj.Length; x++)
    {
      LineCap temp = (LineCap)obj.GetValue(x);
      thePen.StartCap = temp;
      thePen.EndCap = temp;
      g.DrawString(temp.ToString(), new Font("Times New Roman", 10), new SolidBrush(Color.Black), 0, yOffSet);
      g.DrawLine(thePen, 100, yOffSet, Width - 50, yOffSet);
      yOffSet += 40;
    }
  }
  private void LineCapDemo_Resize(object sender, System.EventArgs e)
  {
    Invalidate();
  }
}

Dashed pen

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class PenCustomDash : System.Windows.Forms.Form
{
  private System.ruponentModel.Container components = null;
  public PenCustomDash()
  {
    InitializeComponent();
    SetStyle(ControlStyles.ResizeRedraw, true);
  }
  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
  private void InitializeComponent()
  {
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(211, 104);
    this.Text = "A Form with Style!";
    this.Paint += new System.Windows.Forms.PaintEventHandler(this.PenCustomDash_Paint);
  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new PenCustomDash());
  }
  private void PenCustomDash_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Pen customDashPen = new Pen(Color.Black, 10);
    float[] myDashes = {5.0f, 2.0f, 1.0f, 3.0f};
    customDashPen.DashPattern = myDashes;
    e.Graphics.DrawRectangle(customDashPen, ClientRectangle);
  }
}

Disposal Errors

using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Data;
using System.Drawing;
using System.Windows.Forms;
  class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void Form1_Paint(object sender, PaintEventArgs e)
    {
      Pen p = Pens.Black;
      
      p.Dispose();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 271);
      this.Name = "Form1";
      this.Text = "Form1";
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);
    }
    [STAThread]
    static void Main()
    {
      Application.EnableVisualStyles();
      Application.Run(new Form1());
    }
  }

LineCap.ArrowAnchor

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

public class Form1 : System.Windows.Forms.Form {
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        Pen p = new Pen(Color.Brown, 15);
        // set the Arrow
        p.StartCap = LineCap.ArrowAnchor;
        p.EndCap = LineCap.ArrowAnchor;
        g.DrawLine(p, 30, 30, Width - 50, 30);
    }
}

LineCap.Round

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

public class Form1 : System.Windows.Forms.Form {
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        Pen p = new Pen(Color.Brown, 15);
        // round ends
        p.StartCap = LineCap.Round;
        p.EndCap = LineCap.Round;
        g.DrawLine(p, 30, 80, Width - 50, 80);
    }
}

LineCap.RoundAnchor

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

public class Form1 : System.Windows.Forms.Form {
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        Pen p = new Pen(Color.Brown, 15);
        // round Anchor
        p.StartCap = LineCap.RoundAnchor;
        p.EndCap = LineCap.RoundAnchor;
        g.DrawLine(p, 30, 120, Width - 50, 120);
    }
}

LineCap.SquareAnchor

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

public class Form1 : System.Windows.Forms.Form {
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        Pen p = new Pen(Color.Brown, 15);
        // square Anchor
        p.StartCap = LineCap.SquareAnchor;
        p.EndCap = LineCap.SquareAnchor;
        g.DrawLine(p, 30, 190, Width - 50, 190);
    }
}

LineCap.Triangle

using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Drawing2D;
public class Form1 : System.Windows.Forms.Form {
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }
    protected override void OnPaint(PaintEventArgs e) {
        Graphics g = e.Graphics;
        Pen p = new Pen(Color.Brown, 15);
        // triangle
        p.StartCap = LineCap.Triangle;
        p.EndCap = LineCap.Triangle;
        g.DrawLine(p, 30, 150, Width - 50, 150);
    }
}

Make a big blue pen

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class PenBigBlue : System.Windows.Forms.Form
{
  private System.ruponentModel.Container components = null;
  public PenBigBlue()
  {
    InitializeComponent();
    SetStyle(ControlStyles.ResizeRedraw, true);
  }
  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
  private void InitializeComponent()
  {
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 273);
    this.Paint += new System.Windows.Forms.PaintEventHandler(this.PenBigBlue_Paint);
  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new PenBigBlue());
  }
  private void PenBigBlue_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    // Make a big blue pen.
    Pen bluePen = new Pen(Color.Blue, 20);
    
    g.DrawEllipse(bluePen, 10, 10, 100, 100);
  }
}

PenAlignment.Inset

using System;
using System.Collections.Generic;
using System.ruponentModel;
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;
        Pen p = new Pen(Color.Black, 3);
        p.Alignment = PenAlignment.Inset;
        g.DrawRectangle(p, 3, 3, 8, 7);
        p.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

Pens: Firebrick

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class PensFirebrick : System.Windows.Forms.Form
{
  private System.ruponentModel.Container components = null;
  public PensFirebrick()
  {
    InitializeComponent();
    SetStyle(ControlStyles.ResizeRedraw, true);
  }
  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
  private void InitializeComponent()
  {
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 273);
    this.Paint += new System.Windows.Forms.PaintEventHandler(this.PensFirebrick_Paint);
  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new PensFirebrick());
  }
  private void PensFirebrick_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    Pen pen2 = Pens.Firebrick;
    
    g.DrawLine(pen2, 10, 130, 110, 130);
  }
}

Pen start and end cap

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class PenStartEndCap : System.Windows.Forms.Form
{
  public PenStartEndCap()
  {
    this.BackColor = System.Drawing.Color.White;
    this.ClientSize = new System.Drawing.Size(400, 400);
    this.Paint += new System.Windows.Forms.PaintEventHandler(this.PenStartEndCap_Paint);
  }

  static void Main() 
  {
    Application.Run(new PenStartEndCap());
  }
  private void PenStartEndCap_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    
    Pen p2 = new Pen(Color.Gray, 7);
    p2.EndCap = LineCap.Round;
    p2.StartCap = LineCap.ArrowAnchor;
    g.DrawLine(p2, 25, 35, 25, 365);
    g.DrawLine(p2, 35, 375, 365, 375);
    g.DrawLine(p2, 375, 365, 375, 35);
    g.DrawLine(p2, 365, 25, 35, 25);
  }
}

Use Pen directly

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
public class PensDirectly : System.Windows.Forms.Form
{
  private System.ruponentModel.Container components = null;
  public PensDirectly()
  {
    InitializeComponent();
    SetStyle(ControlStyles.ResizeRedraw, true);
  }
  protected override void Dispose( bool disposing )
  {
    if( disposing )
    {
      if (components != null) 
      {
        components.Dispose();
      }
    }
    base.Dispose( disposing );
  }
  private void InitializeComponent()
  {
    this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
    this.ClientSize = new System.Drawing.Size(292, 273);
    this.Paint += new System.Windows.Forms.PaintEventHandler(this.PensDirectly_Paint);
  }
  [STAThread]
  static void Main() 
  {
    Application.Run(new PensDirectly());
  }
  private void PensDirectly_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
  {
    Graphics g = e.Graphics;
    g.DrawPie(Pens.Black, 150, 10, 120, 150, 90, 80);
  }
}