用C# 画饼图，并在图上加注释

C# 画饼图，并在图上加注释

 

效果图 ：

代码：

 

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Collections;
using System.Collections.Generic;

namespace BarCharTest
{
    public class PieImage : IChart
    {
        public void Bind(HttpResponse response)
        {
            List<valueDesc> valueDescList = new List<valueDesc>();
            valueDesc vd1 = new valueDesc(10,"Group A");
            valueDesc vd2 = new valueDesc(20, "Group B");
            valueDesc vd3 = new valueDesc(30, "Group C");
            valueDesc vd4 = new valueDesc(15, "Group D");
            valueDesc vd5 = new valueDesc(5, "Group E");

            valueDescList.Add(vd1);
            valueDescList.Add(vd2);
            valueDescList.Add(vd3);
            valueDescList.Add(vd4);
            valueDescList.Add(vd5);

            DrawPie(response, valueDescList);
        }

        private void DrawPie(HttpResponse response, List<valueDesc> valueDescList)
        {
            //FONT
            Font fontlegend = new Font("verdana", 9);
            Font fonttitle = new Font("verdana", 10, FontStyle.Bold);
            Font fontLabel = new Font("verdana", 8, FontStyle.Regular);

            //BackGround
            int width = 500;
            int bufferspace = 15;//TOP BUGGER,LEFT BUFFER
            int legendheight = fontlegend.Height * 10 + bufferspace; //HEIGHT
            int titleheight = fonttitle.Height + bufferspace;
            int h