How to create pie charts in web applns

How to create pie charts in web applns

Pie Chart in ASP.net <%@ Import Namespace="System.Drawing"%> <%@ Import Namespace="System.Drawing.Imaging"%> <%@ Import Namespace="System.Drawing.Drawing2D" %> <script language="C#" runat="server"> void Page_Load(Object sender, EventArgs e) { // Since we are outputting a Jpeg, set the ContentType appropriately Response.ContentType = "image/jpeg"; // Create a Bitmap instance that's 468x60, and a Graphics instance const int width = 300, height = 300; Bitmap objBitmap = new Bitmap(width, height); Graphics objGraphics = Graphics.FromImage(objBitmap); // Create a black background for the border objGraphics.FillRectangle(new SolidBrush(Color.White), 0, 0, width, height); Draw3DPieChart(ref objGraphics); // Save the image to a file objBitmap.Save(Response.OutputStream, ImageFormat.Jpeg); // clean up... objGraphics.Dispose(); objBitmap.Dispose(); } // Draws a 3D pie chart where ever slice is 45 degrees in value void Draw3DPieChart(ref Graphics objGraphics) { int iLoop, iLoop2; // Create location and size of ellipse. int x = 50; int y = 20; int width = 200; int height = 100; // Create start and sweep angles. int startAngle = 0; int sweepAngle = 45; SolidBrush oibjBrush = new SolidBrush(Color.Aqua); Random rand = new Random(); objGraphics.SmoothingMode = SmoothingMode.AntiAlias; //Loop through 180 back around to 135 degress so it gets drawn // correctly. for( iLoop = 0; iLoop <= 315; iLoop += 45) { startAngle = (iLoop + 180) % 360; objBrush.Color = Color.FromArgb(rand.Next(255), rand.Next(255), rand.Next(255)); // On degrees from 0 to 180 draw 10 Hatched brush slices to show // depth if((startAngle < 135) || (startAngle == 180)) { for(iLoop2 = 0; iLoop2 < 10; iLoop2++) objGraphics.FillPie(new HatchBrush(HatchStyle.Percent50, objBrush.Color), x, y + iLoop2, width, height, startAngle, sweepAngle); } // Displace this pie slice from pie. if(startAngle == 135) { // Show Depth for(iLoop2 = 0; iLoop2 < 10; iLoop2++) objGraphics.FillPie(new HatchBrush(HatchStyle.Percent50, objBrush.Color), x - 30, y + iLoop2 + 15, width, height, startAngle, sweepAngle); objGraphics.FillPie(objBrush, x - 30, y + 15, width, height, startAngle, sweepAngle); } else // Draw normally objGraphics.FillPie(objBrush, x, y, width, height, startAngle, sweepAngle); } } </script> Mitesh Mehta Microsoft Certified Professional