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2025-04-02 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >
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This article introduces the relevant knowledge of "how to generate pie and bar charts in asp.net". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
1. Common methods for generating graphics:
The copy code is as follows:
Using System
Using System.Collections.Generic
Using System.Text
/ /
/ / using System.Data
/ / using System.Web.UI.WebControls
/ /
Using System.Drawing
Using System.Drawing.Imaging
Namespace Tools
{
Public static class OWCImageHelp
{
/ / /
/ / dynamically generate histogram and pie chart
/ / /
/ / Fields to be displayed in row coordinates
/ / the number to be displayed in the ordinate
/ / title
Public static void GetZBImage (string [] arrValueNames, int [] arrValues, string title)
{
Bitmap objBitMap = new Bitmap (650,300)
Graphics objGraphics
ObjGraphics = Graphics.FromImage (objBitMap)
ObjGraphics.Clear (Color.White)
/ / int [] arrValues = {40000, 32000, 24000, 30000, 36000, 28000}
/ / string [] arrValueNames = new string [] {"first", "second", "third", "fourth", "fifth", "sixth"}
ObjGraphics.DrawString (title, new System.Drawing.Font (Song style, 16), Brushes.Blue, new PointF (5,5))
PointF symbolLeg = new PointF (335,20)
PointF descLeg = new PointF (360,16)
/ / draw the figure in the description section
For (int I = 0; I < arrValueNames.Length; iTunes +)
{
ObjGraphics.FillRectangle (new SolidBrush (GetColor (I)), symbolLeg.X, symbolLeg.Y, 20, 10)
ObjGraphics.DrawRectangle (Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10)
ObjGraphics.DrawString (arrValueNams [I] .ToString (), new System.Drawing.Font ("Verdana", 10), Brushes.Black, descLeg)
SymbolLeg.Y + = 15
DescLeg.Y + = 15
}
Float TotalValues = 0
For (int I = 0; I
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