转自原文 zedgraph绘图(修改)

首先先下载 zedgraph.dll和zedgraph.web.DLL两个文件

添加项目并引用

首先添加一个用户控件 WebUserDrawGrap.ascx

html页面：

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<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebUserDrawGrap.ascx.cs" Inherits="CraigBlog.Net.zedGraph.WebUserDrawGrap" %>
<%@ Register TagPrefix="zgw" Namespace="ZedGraph.Web" Assembly="ZedGraph.Web" %>
<ZGW:ZEDGRAPHWEB id="zedGraphControl" runat="server" width="600" Height="375" RenderMode="ImageTag"/>
 
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 = 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 ==  || Colors.Count != Count)

            {

                Random r = new Random();

                int tempIndex = ;

                List<int> tempIndexList = new List<int>();

                for (int i = ; i < Count; i++)

                {

                    tempIndex = r.Next(defaultColors.Count);

                    if (tempIndexList.Contains(tempIndex))

                    {

                        i--;

                    }

                    else

                    {

                        tempIndexList.Add(tempIndex);

                        Colors.Add(defaultColors[tempIndex]);

                    }

                }

            }

            if (NameList.Count == )

            {

                if (Type == AnalyticsType.Bar)

                {

                    for (int i = ; i < DataSource[].Count; i++)

                    {

                        NameList.Add("第" + i.ToString() + "组");

                    }

                }

                else

                {

                    for (int i = ; i < Count; i++)

                    {

                        NameList.Add("第" + i.ToString() + "组");

                    }

                }

            }

            if (LabelList.Count == )

            {

                for (int i = ; 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[];

            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 = ; 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 = ;

            graphPane.YAxis.MinorGrid.IsVisible = true;

            graphPane.YAxis.MinorGrid.DashOff = ;

            graphPane.YAxis.Title.FontSpec.Angle = ;

            graphPane.YAxis.Title.FontSpec.FontColor = defaultColors[];

        }

        /// <summary>

        /// 画柱状图

        /// </summary>

        /// <param name="graphPane"></param>

        private void DrawBar(GraphPane graphPane)

        {

            for (int i = ; 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 = ;//栅格线的效果，同下

            graphPane.YAxis.Scale.BaseTic = ;//刻度的初始开始值

            graphPane.YAxis.Scale.MajorStep = ;//设置刻度的步进值

            graphPane.YAxis.MajorGrid.IsVisible = true; //栅格线是否可见

            graphPane.YAxis.MajorGrid.DashOff = ;//设置的栅格线的效果。0表示为实线

            graphPane.YAxis.MajorGrid.PenWidth = ;//设置栅格线的线条的宽度

            graphPane.YAxis.Title.FontSpec.Angle = ;//设置标题的显示,顺时针旋转90度

            graphPane.Fill = new Fill(Color.White, Color.FromArgb(, 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 = ; i < Count; i++)

            {

                PieItem pieitme = graphPane.AddPieSlice(ScaleData[i], Colors[i], Color.Wheat, 45f, , 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, , );

            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 = ; j < valueDouble.Count; j++)

            {

                PointPair pt = new PointPair(j + , valueDouble[j]);

                TextObj text = new TextObj(pt.Y.ToString(valueFormat), pt.X, pt.Y>(double)?pt.Y-: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 = ; //数值字体倾斜度

                text.FontSpec.Size = ;

                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

    }

}

--然后新建一个aspx页面：ZDrawGrap.aspx

将用户控件拖到页面

ZDrawGrap.aspx .cs程序如下:

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", ); dic.Add("类别二", ); dic.Add("类别三", );

            dic.Add("类别四", ); dic.Add("类别五", ); dic.Add("类别六", );

            //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 = ; 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 = ; 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 = ; 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);

        }

    }

}

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