代码using System;using System.Collections;using System.Configuration;using System.Data;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 ZedGraph;using ZedGraph.Web;using System.Collections.Generic;namespace CraigBlog.Net.zedGraph{    /// <summary>    /// 显示统计图形类型    /// </summary>    public enum AnalyticsType    {        Line,   //折线图        Bar,    //柱状图        Pie     //饼图    };    public partial class WebUserDrawGrap : System.Web.UI.UserControl    {        private List<Color> defaultColors = new List<Color>();/// 默认颜色种类        private int Count;/// 统计的个数        public string Title;/// 统计图的名称        public string XAxisTitle;///横轴的名称（饼图不需要）        public string YAxisTitle;/// 纵轴的名称（饼图不需要）        public AnalyticsType Type;/// 显示的曲线类型：Line,Bar,Pie        public List<PointPairList> DataSource = new List<PointPairList>();/// 折线图和柱状图的数据源        public List<double> ScaleData = http://www.mamicode.com/new List<double>();/// 饼图的数据源        public List<Color> Colors = new List<Color>();/// 各段数据的颜色        public List<string> NameList = new List<string>();/// 各段数据的名称        public List<string> LabelList = new List<string>(); /// 用于柱状图，每个圆柱体表示的含义        public List<double> ValueDouble = new List<double>();//用于定义柱形表示的值        private void InitDefaultColors()        {            defaultColors.Add(Color.Red);            defaultColors.Add(Color.Green);            defaultColors.Add(Color.Blue);            defaultColors.Add(Color.Yellow);            defaultColors.Add(Color.YellowGreen);            defaultColors.Add(Color.Brown);            defaultColors.Add(Color.Aqua);            defaultColors.Add(Color.Cyan);            defaultColors.Add(Color.DarkSeaGreen);            defaultColors.Add(Color.Indigo);        }        /// <summary>        /// 如果属性为空则初始化属性数据        /// </summary>        private void InitProperty()        {            InitDefaultColors();            if (string.IsNullOrEmpty(Title))            {                Title = "未命名统计图";            }            if (string.IsNullOrEmpty(XAxisTitle))            {                XAxisTitle = "横轴";            }            if (string.IsNullOrEmpty(YAxisTitle))            {                YAxisTitle = "纵轴";            }            if (Type == AnalyticsType.Pie)            {                Count = ScaleData.Count;            }            else            {                Count = DataSource.Count;            }            if (Colors.Count == 0 || Colors.Count != Count)            {                Random r = new Random();                int tempIndex = 0;                List<int> tempIndexList = new List<int>();                for (int i = 0; i < Count; i++)                {                    tempIndex = r.Next(defaultColors.Count);                    if (tempIndexList.Contains(tempIndex))                    {                        i--;                    }                    else                    {                        tempIndexList.Add(tempIndex);                        Colors.Add(defaultColors[tempIndex]);                    }                }            }            if (NameList.Count == 0)            {                if (Type == AnalyticsType.Bar)                {                    for (int i = 0; i < DataSource[0].Count; i++)                    {                        NameList.Add("第" + i.ToString() + "组");                    }                }                else                {                    for (int i = 0; i < Count; i++)                    {                        NameList.Add("第" + i.ToString() + "组");                    }                }            }            if (LabelList.Count == 0)            {                for (int i = 0; i < Count; i++)                {                    LabelList.Add("含义" + i.ToString());                }            }        }        protected void Page_Load(object sender, EventArgs e)        {            zedGraphControl.RenderGraph += new ZedGraph.Web.ZedGraphWebControlEventHandler(zedGraphControl_RenderGraph);        }        /**/        /// <summary>        /// 画图        /// </summary>        /// <param name="webObject"></param>        /// <param name="g"></param>        /// <param name="pane"></param>        private void zedGraphControl_RenderGraph(System.Drawing.Graphics g, ZedGraph.MasterPane pane)        {            InitProperty();            GraphPane myPane = pane[0];            myPane.Title.Text = Title;            myPane.XAxis.Title.Text = XAxisTitle;            myPane.YAxis.Title.Text = YAxisTitle;            switch (Type)            {                case AnalyticsType.Line:                    DrawLine(myPane);                    break;                case AnalyticsType.Bar:                    DrawBar(myPane);                    break;                case AnalyticsType.Pie:                    DrawPie(myPane);                    break;                default:                    break;            }            pane.AxisChange(g);            System.IO.MemoryStream st = new System.IO.MemoryStream();            myPane.GetImage().Save(st, System.Drawing.Imaging.ImageFormat.Jpeg);//得到图片流            此处是得到该图片的图片流-可以将该流扩展到excel表格中(注意：需在项目目录中新建一个存放图片的文件夹ZedGraphImages)        }        #region Draw        /// <summary>        /// 画折线图        /// </summary>        /// <param name="graphPane"></param>        private void DrawLine(GraphPane graphPane)        {            for (int i = 0; i < Count; i++)            {                graphPane.AddCurve(NameList[i], DataSource[i], Colors[i], SymbolType.None);            }            CreateBarLabels(graphPane, "f0", ValueDouble);            graphPane.XAxis.Scale.TextLabels = NameList.ToArray();            graphPane.XAxis.Type = AxisType.Text;            graphPane.YAxis.Scale.MajorStep = 20;            graphPane.YAxis.MinorGrid.IsVisible = true;            graphPane.YAxis.MinorGrid.DashOff = 0;            graphPane.YAxis.Title.FontSpec.Angle = 90;            graphPane.YAxis.Title.FontSpec.FontColor = defaultColors[0];        }        /// <summary>        /// 画柱状图        /// </summary>        /// <param name="graphPane"></param>        private void DrawBar(GraphPane graphPane)        {            for (int i = 0; i < Count; i++)            {               graphPane.AddBar(LabelList[i], DataSource[i], Colors[i]).Bar.Fill = new Fill(Colors[i], Color.White, Colors[i]);                           }            CreateBarLabels(graphPane, "f0", ValueDouble);            graphPane.XAxis.MajorTic.IsBetweenLabels = true;            string[] labels = NameList.ToArray();            graphPane.XAxis.Scale.TextLabels = labels;//x轴的显示的文本集合            graphPane.XAxis.Type = AxisType.Text;            graphPane.XAxis.MajorGrid.IsVisible = false;//x轴栅格线是否可见            graphPane.XAxis.MajorGrid.DashOff = 0;//栅格线的效果，同下            graphPane.YAxis.Scale.BaseTic = 0;//刻度的初始开始值            graphPane.YAxis.Scale.MajorStep = 20;//设置刻度的步进值            graphPane.YAxis.MajorGrid.IsVisible = true; //栅格线是否可见            graphPane.YAxis.MajorGrid.DashOff = 0;//设置的栅格线的效果。0表示为实线            graphPane.YAxis.MajorGrid.PenWidth = 1;//设置栅格线的线条的宽度            graphPane.YAxis.Title.FontSpec.Angle = 90;//设置标题的显示,顺时针旋转90度            graphPane.Fill = new Fill(Color.White, Color.FromArgb(50, Color.Beige), 45.0f);            graphPane.Chart.Fill = new Fill(Color.White, Color.LightGoldenrodYellow, 45.0f);        }        /// <summary>        /// 画饼图        /// </summary>        /// <param name="graphPane"></param>        private void DrawPie(GraphPane graphPane)        {            graphPane.Fill = new Fill(Color.White, Color.Silver, 45.0f);            graphPane.YAxis.IsVisible = false;            graphPane.XAxis.IsVisible = false;            graphPane.Chart.Fill.Type = FillType.None;            graphPane.Legend.Position = LegendPos.Float;            graphPane.Legend.Location = new Location(0.95f, 0.15f, CoordType.PaneFraction, AlignH.Right, AlignV.Top);            graphPane.Legend.FontSpec.Size = 16f;            graphPane.Legend.IsHStack = false;            for (int i = 0; i < Count; i++)            {                PieItem pieitme = graphPane.AddPieSlice(ScaleData[i], Colors[i], Color.Wheat, 45f, 0, NameList[i] + ScaleData[i]);                pieitme.LabelType = PieLabelType.Percent;//设置显示的类型、Percent（百分比）            }        }        /// <summary>        /// 如果系统出错，显示错误信息        /// </summary>        /// <param name="graphPane"></param>        /// <param name="message"></param>        private void DrawMessage(GraphPane graphPane, string message)        {            TextObj text = new TextObj(message, 200, 200);            text.Text = message;            graphPane.GraphObjList.Add(text);        }        /// <summary>        /// 为柱状图添加标签        /// </summary>        /// <param name="graphPane"></param>        /// <param name="valueFormat"></param>        /// <param name="valueDouble"></param>        private void CreateBarLabels(GraphPane graphPane, string valueFormat, List<double> valueDouble)        {            for (int j = 0; j < valueDouble.Count; j++)            {                PointPair pt = new PointPair(j + 1, valueDouble[j]);                TextObj text = new TextObj(pt.Y.ToString(valueFormat), pt.X, pt.Y>(double)10?pt.Y-10:pt.Y, CoordType.AxisXYScale, AlignH.Left, AlignV.Center);                text.ZOrder = ZOrder.A_InFront;                text.FontSpec.Border.IsVisible = false;                text.FontSpec.Fill.IsVisible = false;                text.FontSpec.Angle = 1; //数值字体倾斜度                text.FontSpec.Size = 16;                text.FontSpec.FontColor = Color.Black;                text.FontSpec.IsBold = true;                text.Location.CoordinateFrame = CoordType.AxisXY2Scale;                text.Location.AlignH = AlignH.Center;                text.Location.AlignV = AlignV.Center;                graphPane.GraphObjList.Add(text);            }        }        #endregion    }}

代码using System;using System.Collections;using System.Configuration;using System.Data;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.Collections.Generic;using System.Drawing;using ZedGraph;namespace CraigBlog.Net.zedGraph{    public partial class ZDrawGrap : System.Web.UI.Page    {        Dictionary<string, int> dic = new Dictionary<string, int>(); //创建数据源        protected void Page_Load(object sender, EventArgs e)        {            dic.Add("类别一", 20); dic.Add("类别二", 10); dic.Add("类别三", 25);            dic.Add("类别四", 6); dic.Add("类别五", 13); dic.Add("类别六", 95);            //柱状图            DrawBar(DrawGrap1);            //饼图            DrawPie(DrawGrap2);            //曲线图            DrawLine(DrawGrap3);        }        private void DrawBar(WebUserDrawGrap DrawGrap1)        {            string Ytitle = "用户访问量";            DrawGrap1.Type = AnalyticsType.Bar;            DrawGrap1.Title = "用户访问柱状图";            DrawGrap1.XAxisTitle = "类别";            DrawGrap1.YAxisTitle = Ytitle;           // DrawGrap1.YAxisTitle = "用\n户\n访\n问\n数\n量";//设置标题呈现的样式            char[] ArrayChar = Ytitle.ToCharArray();            DrawGrap1.YAxisTitle = ForeachChar(ArrayChar);            ZedGraph.PointPairList list = new ZedGraph.PointPairList();            for (int i = 0; i < dic.Count; i++)            {                KeyValuePair<string, int> keyPair = dic.ElementAt(i);                list.Add((double)i, (double)keyPair.Value);//绘制柱形                DrawGrap1.NameList.Add(ForeachChar(keyPair.Key.ToCharArray()));                DrawGrap1.ValueDouble.Add((double)keyPair.Value);            }            DrawGrap1.LabelList.Add("Color Items");            DrawGrap1.DataSource.Add(list);        }        private string ForeachChar(char[] array)        {            string temp = string.Empty;            foreach (char item in array)            {                temp += item.ToString() +"\n";             }            return temp;        }        private void DrawPie(WebUserDrawGrap DrawGrap1)        {            DrawGrap1.Type = AnalyticsType.Pie;            DrawGrap1.Title = "用户访问饼图";            for (int i = 0; i < dic.Count; i++)            {                KeyValuePair<string, int> keyPair = dic.ElementAt(i);                DrawGrap1.ScaleData.Add((double)keyPair.Value);                DrawGrap1.NameList.Add(keyPair.Key);            }        }        private void DrawLine(WebUserDrawGrap DrawGrap1)        {            DrawGrap1.Type = AnalyticsType.Line;            DrawGrap1.Title = "用户访问曲线图";            DrawGrap1.XAxisTitle = "类别";            DrawGrap1.YAxisTitle = "用\n户\n访\n问\n数\n量"; //y轴标题竖着排            ZedGraph.PointPairList list = new ZedGraph.PointPairList();            for (int i = 0; i < dic.Count; i++)            {                KeyValuePair<string, int> keyPair = dic.ElementAt(i);                list.Add(new PointPair((double)i,(double)keyPair.Value));                DrawGrap1.ValueDouble.Add((double)keyPair.Value);                DrawGrap1.NameList.Add(keyPair.Key);            }            DrawGrap1.LabelList.Add("Color Items");            DrawGrap1.DataSource.Add(list);                    }    }}