C# drawing Circle,Line,Rectangle and Ellipse on forms

Drawing on C# forms is very easy we just have to learn a few things first. To draw on C# form we need to first define a graphics object which is simply you can say a canvas or a paper on which we will draw our lines,circles or rectangles etc.

Step 1. Declaring a Graphics Object:

Here we declared a graphics object g on which we need to draw lines,rectangle circles etc.

Step 2. Define Pen or brush for drawing:

To draw a line we need to declare and initialize a pen first we do this in following fashion

This line defines a pen named ‘myPen’ which has black colour and its nib is 1 pixel wide for a marker like brush use a wider nib giving 5 or 10 as per suits you.

For different coloured pen use in argument one Color.colorName like Color.Red for a red coloured pen.

Step 3.  Draw Line:

First we learn how to draw a line. For drawing line we need to define two points between which we intend to draw line defining points is done this way

Now to draw a line between sp  & ep we do this

We have given drawLine() function 3 arguments pen,sp and ep. A pen to draw with and a starting point and an ending point between which we need to draw a line.

Step 4. Draw Rectangle:

We draw rectangle in similar way but this time using drawRectangle() function with different arguments

We gave it pen to draw with and x(the top right x-coordinate of rectangle),y(the top right y-coordinate of rectangle),width and height.

Step 5. Draw Circle And Ellipse:

For drawing circle there is not any specific method but as we know a circle is an ellipse with both axis of same size or we can say that a circle is an ellipse with same width and height so we use this logic to draw a circle.

Ellipse:

To draw ellipse we use different width and height like

That’s all folks. Hope you enjoyed and liked it. If you got any queries regarding drawing in C# feel free to comment it will be appreciated. Thanks!