asp.net中生成饼状与柱状图实例

本文实例讲述了asp.net中生成饼状与柱状图的实现方法。。具体方法如下：

一、生成图形的公共方法：
代码如下: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
    {
        /// <summary>
        /// 动态的生成柱状图和饼状图
        /// </summary>
        /// <param name="arrValueNames">行坐标要显示的字段</param>
        /// <param name="arrValues">纵坐标要显示的数字</param>
        /// <param name="title">标题</param>
        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[] { "第一次", "第二次", "第三次", "第四次", "第五次", "第六次" };
            objGraphics.DrawString(title, new System.Drawing.Font("宋体", 16), Brushes.Blue, new PointF(5, 5));
            PointF symbolLeg = new PointF(335, 20);
            PointF descLeg = new PointF(360, 16);
            //画出说明部分的图形
            for (int i = 0; i < arrValueNames.Length; i++)
            {
                objGraphics.FillRectangle(new SolidBrush(GetColor(i)), symbolLeg.X, symbolLeg.Y, 20, 10);
                objGraphics.DrawRectangle(Pens.Black, symbolLeg.X, symbolLeg.Y, 20, 10);