asp.net chart Statistics class

Asp.net| Statistics | charts

Previous time project needs, wrote a simple icon statistics class. Decide to write something to blog later.

Using System;
Using System.Drawing;
Using System.Drawing.Imaging;
Using System.Drawing.Drawing2D;

Namespace Crystalreportsdemo
... {
/**////<summary>
CreateReport draw a graphical report-column chart.
</summary>
public class CreateReport
... {

Public CreateReport ()
... {
//
TODO: Add constructor logic here
//
}

        public Bitmap createpicturereport (string[] x,int[] y,string ReportName )
        ... {
            if (x.length!= y.length)
             ... {
                throw new Exception ("Inconsistent number of x and y numbers");
           }
            int colnum=y.length;
            int colscale=880/(colnum+1);

Bitmap bmp = new Bitmap (900,700,PIXELFORMAT.FORMAT24BPPRGB);
Graphics DC = graphics.fromimage (BMP);
dc. FillRectangle (New SolidBrush (Color.White), 0,0,900,700);

Pen Scalepen = new Pen (color.black,2);
Pen Gridpen = new Pen (color.black,1);

dc. DrawLine (scalepen,20,680,880,680);
dc. DrawLine (scalepen,20,680,20,20);

dc. DrawLine (gridpen,20,20,880,20);
dc. DrawLine (gridpen,880,20,880,680);

Point Drawpoint;
int Xpoint;
int yheight;
if (colnum==0)
... {
throw new Exception ("No data value, Colnum value is 0 as divisor, throw exception");

}
int drawwidth=880/(4*colnum);
int drawwidth=580/(4*colnum+1);//4*colnum+1 ensure Colnum is not 0. Otherwise 580/(4*0); 0 cannot be a divisor
int Maxnum=getmaxnum (y);
Rectangle RCT;
Random rnd = new Random ();
int red,green,blue;

for (int i=20;i<680;i=i+96)
... {
dc. DrawLine (Gridpen,20,i,880,i);
}

for (int i=0;i<colnum;i++)
... {
Red=rnd. Next (0,255);
Green=rnd. Next (0,255);
Blue=rnd. Next (0,255);
SolidBrush brush=new SolidBrush (Color.FromArgb (Red,green,blue));
xpoint=20+ ((i+1) *colscale)-drawwidth;
Yheight=y[i]*650/maxnum;
Drawpoint=new Point (Xpoint,680-yheight);
Rct=new Rectangle (drawpoint,new Size (drawwidth*2,yheight));
dc. FillRectangle (BRUSH,RCT);
dc. DrawRectangle (GRIDPEN,RCT);

Draw x values
dc. DrawString (x[i],new Font ("Arial", 9), New SolidBrush (color.orangered), New PointF ((float) (XPOINT+DRAWWIDTH/2), 680- YHEIGHT/2));
Draw Y values
dc. DrawString (Y[i]. ToString (), New Font ("Arial", 9), New SolidBrush (Color.Black), New PointF ((float) (Xpoint + drawwidth/2), 680-yheight-15) ;
}


dc. DrawString (reportname,new Font ("XXFarEastFont-Arial"), brushes.black,3,3);

return BMP;

           }
        Private int getmaxnum (int[] arr)
         ... {
            int max=arr[0];
            for (int i=1;i<arr. length;i++)
            ... {
                if (arr[i]> max)
                ... {
                     Max=arr[i];
               }

}
return Max;

}

}
}