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 == 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

}
}

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);

}
}
}