Creating Bar Chart in windows using C#
Introduction-
For making bar chart we will make use of ‘DrawRectangle’ in built function. because we have to first create a big rectangle defining the boundary of bar graphs. Parameters of DrawRectangle is :
1. Pen – This defines the color and style of border
2. Rectangle – Rectangle object to be created
Rectangle(int x, int y, int width,int height)
X and y are the co-ordinates of top left corner of rectangle. Width and height are width and height of rectangle.
Height = (weight of current array element *height of outer rectangle )/ maximum weight.
X coordinate is incremented by width of bars everytime a new bar is created.
Y co-ordinate is calculated by the following formula:
Introduction-
For making bar chart we will make use of ‘DrawRectangle’ in built function. because we have to first create a big rectangle defining the boundary of bar graphs. Parameters of DrawRectangle is :
1. Pen – This defines the color and style of border
2. Rectangle – Rectangle object to be created
Rectangle(int x, int y, int width,int height)
X and y are the co-ordinates of top left corner of rectangle. Width and height are width and height of rectangle.
Height = (weight of current array element *height of outer rectangle )/ maximum weight.
X coordinate is incremented by width of bars everytime a new bar is created.
Y co-ordinate is calculated by the following formula:
y = y coordinate of outer rectangle + height of outer rectangle – height of bar Code for DrawBarChart
private void DrawBarChart(PaintEventArgs e, int[] alWeight)
{
int numberOfSections = alWeight.Length;
int lengthArea = 330;
int heightArea = 280;
int topX = 20;
int topY = 20;
int maxWeight = MaxValue(alWeight);
int[] height = new int[numberOfSections];
int total = SumOfArray(alWeight);
Random rnd = new Random();
SolidBrush brush = new SolidBrush(Color.Aquamarine);
Pen pen = new Pen(Color.Gray);
Rectangle rec = new Rectangle(topX, topY, lengthArea, heightArea);
e.Graphics.DrawRectangle(pen, rec);
pen.Color = Color.Black;
int smallX = topX;
int smallY = 0;
int smallLength = (lengthArea / alWeight.Length);
int smallHeight = 0;
for (int i = 0; i < numberOfSections; i++)
{
brush.Color = Color.FromArgb(rnd.Next(200, 255),
rnd.Next(255), rnd.Next(255), rnd.Next(255));
smallHeight = ((alWeight[i] * heightArea) / maxWeight);
smallY = topY + heightArea - smallHeight;
Rectangle rectangle = new Rectangle
(smallX, smallY, smallLength, smallHeight);
e.Graphics.DrawRectangle(pen, rectangle);
e.Graphics.FillRectangle(brush, rectangle);
brush.Color = Color.FromKnownColor(KnownColor.Black);
e.Graphics.DrawRectangle(pen, rectangle);
smallX = smallX + smallLength;
}
} |
