Working with Vector Graphics in C#

Aspose.Drawing for .NET makes it easy for you to draw vector graphics using C#. The API lets you work with a variety of different vector graphics such as arcs, Bezier spline, Cardinal Spline, closed curves, ellipses, lines and a  number of other types. This article contains C# examples for drawing different types of vector graphics using the API.

Draw Arc in C#

To drawn an arc using C#:

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawArc method of Graphics class object to draw an arc

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
graphics.DrawArc(pen, 0, 0, 700, 700, 0, 180);

bitmap.Save("DrawArc.png");

Draw Bezier Spline in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawBezier method of Graphics class object to draw Bezier Spline

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
PointF p1 = new PointF(0, 0);   // start point
PointF c1 = new PointF(0, 800);   // first control point
PointF c2 = new PointF(1000, 0);  // second control point
PointF p2 = new PointF(1000, 800);  // end point
graphics.DrawBezier(pen, p1, c1, c2, p2);

bitmap.Save("DrawBezierSpline.png");

Draw Cardinal Spline in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawCurve method of Graphics class object to draw Cardinal Spline

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
graphics.DrawCurve(pen, new Point[] { new Point(10, 700), new Point(250, 500), new Point(500, 10), new Point(750, 500), new Point(990, 700) });

bitmap.Save("DrawCardinalSpline.png");

Draw Closed Curve in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawClosedCurve method of Graphics class object to draw closed curve

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
graphics.DrawClosedCurve(pen, new Point[] { new Point(100, 700), new Point(350, 600), new Point(500, 500), new Point(650, 600), new Point(900, 700) });

bitmap.Save("DrawClosedCurve.png");

Draw Ellipse in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawEllipse method of Graphics class object to draw Ellipse

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
graphics.DrawEllipse(pen, 10, 10, 900, 700);

bitmap.Save("DrawEllipse.png");

Draw Lines in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawLine method of Graphics class object to draw lines

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
graphics.DrawLine(pen, 10, 700, 500, 10);
graphics.DrawLine(pen, 500, 10, 990, 700);

bitmap.Save("DrawLines.png");

Draw Path in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Initialize a new object of GraphicsPath class and add Lines to its path collection

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;
using System.Drawing.Drawing2D;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
GraphicsPath path = new GraphicsPath();
path.AddLine(100, 100, 1000, 400);
path.AddLine(1000, 600, 300, 600);
path.AddRectangle(new Rectangle(500, 350, 200, 400));
path.AddEllipse(10, 250, 450, 300);
graphics.DrawPath(pen, path);

bitmap.Save("DrawPath.png");

Draw Polygon in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawPolygon method of Graphics class object to draw Polygon

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
graphics.DrawPolygon(pen, new Point[] { new Point(100, 100), new Point(500, 700), new Point(900, 100) });

bitmap.Save("DrawPolygon.png");

Draw Rectangle in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Define a Pen object with desired parameters
4. Use the DrawRectangle method of Graphics class object to draw Rectangle

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

Pen pen = new Pen(Color.Blue, 2);
graphics.DrawRectangle(pen, 10, 10, 900, 700);

bitmap.Save("DrawRectangle.png");

Fill Region in C#

1. Instantiate an object of Bitmap class
2. Initialize an object of Graphics class from this bitmap
3. Instantiate a GraphicsPath class object
4. Add polygon to the Path collection of GraphicsPath class object
5. Use the FillRegion method of Graphics class to fill defined regions

// For complete examples and data files, please go to https://github.com/aspose-drawing/Aspose.Drawing-for-.NET

using System.Drawing;
using System.Drawing.Drawing2D;

Bitmap bitmap = new Bitmap(1000, 800, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
Graphics graphics = Graphics.FromImage(bitmap);

GraphicsPath path = new GraphicsPath();
path.AddPolygon(new Point[] { new Point(100, 400), new Point(500, 100), new Point(900, 400), new Point(500, 700) });
Region region = new Region(path);

GraphicsPath innerPath = new GraphicsPath();
innerPath.AddRectangle(new Rectangle(300, 300, 400, 200));
region.Exclude(innerPath);

Brush brush = new SolidBrush(Color.Blue);
graphics.FillRegion(brush, region);

bitmap.Save("FillRegion.png");