4.在你的窗体Load方法(如:Form1_Load() )中添加下列代码:
// 在坐标(40,40)处创建一个新图形, 大小为600x400
myPane = new GraphPane( new Rectangle( 40, 40, 600, 400 ),
"My Test Graph\n(For CodeProject Sample)",
"My X Axis",
"My Y Axis" );
// 设置初始数据
double x, y1, y2;
PointPairList list1 = new PointPairList();
PointPairList list2 = new PointPairList();
for( int i=0; i<36; i++ )
{
x = (double) i + 5;
y1 = 1.5 + Math.Sin( (double) i * 0.2 );
y2 = 3.0 * ( 1.5 + Math.Sin( (double) i * 0.2 ) );
list1.Add( x, y1 );
list2.Add( x, y2 );
}
// 创建红色的菱形曲线
// 标记, 图中的"Porsche"
LineItem myCurve = myPane.AddCurve( "Porsche",list1, Color.Red, Symb olType.Diamond );
// 创建蓝色的圆形曲线
// 标记, 图中的"Piper"
LineItem myCurve2 = myPane.AddCurv( "Piper",list2, Color.Blue, SymbolT ype.Circle );
// 在数据变化时绘制图形
myPane.AxisChange( this.CreateGraphics() );
C#画统计图（ZedGraph）
最近要做一个统计分析系统，需要画统计图，听说OWC画图特别慢，而且不好看，ReportView
效果不好而且生成图也很慢。于是就找了一个开源的画统计图的系统------ZedGraph.
选ZedGraph的另一个主要目的是它的开源代码有.NET2.0的版本，我现在在2005上开发，有2.0的程序当然最好了！
ZedGraph支持折线图、柱状图、饼图。
由于开发的需要，我把ZedGraph封装起来，作为一个专门的用户控件。
下面是相关的代码，可以做个参考。
//AnalyticsGraph.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="AnalyticsGraph.ascx.cs" Inherits="AnalyticsGraph" %>
<%@ Register TagPrefix="zgw" Namespace="ZedGraph.Web" Assembly="ZedGraph.Web" %>
RenderMode 只有设置为ImageTag的时候ZedGraph才可以被封装到用户控件中（这个值表示把统计图生成为一个图片文件，再链接到页面上，图片文件在IE关闭后会自动删除）
//AnalyticsGraph.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using ZedGraph;
using ZedGraph.Web;
///
/// 显示统计图形类型
///
public enum AnalyticsType
{
Line, //折线图
Bar, //柱状图
Pie //饼图
};
public partial class AnalyticsGraph : https://www.doczj.com/doc/929681323.html,erControl
{
#region Private Attribute
///
/// 默认颜色种类
///
private List
///
/// 统计的个数
///
private int Count;
#endregion
#region Public Property
///
/// 统计图的名称
///
public string Title;
///
/// 横轴的名称（饼图不需要）
///
public string XAxisTitle;
///
/// 纵轴的名称（饼图不需要）
///
public string Y AxisTitle;
///
/// 显示的曲线类型：Line,Bar,Pie
///
public AnalyticsType Type;
///
/// 折线图和柱状图的数据源
///
public List
///
/// 饼图的数据源
///
public List
///
/// 各段数据的颜色
///
public List
///
/// 各段数据的名称
///
public List
///
/// 用于柱状图，每个圆柱体表示的含义
///
public List
#endregion
protected void Page_Load(object sender, EventArgs e)
{
zedGraphControl.RenderGraph += new ZedGraph.Web.ZedGraphWebControlEventHandler(zedGraphControl_RenderGraph);
}
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);
}
///
/// 如果属性为空则初始化属性数据
///
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
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());
}
}
}
///
/// 画图
///
///
///
///
private void zedGraphControl_RenderGraph(ZedGraph.Web.ZedGraphWeb webObject, 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;
//if (true)
//{
// DrawMessage(myPane, "yiafdhaskjhfasfksahfasdlhfaslf lasgfasglgsadi");
// pane.AxisChange(g);
// return;
//}
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);
}
#region Draw
///
/// 画折线图
///
///
private void DrawLine(GraphPane graphPane)
{
for (int i = 0; i < Count; i++)
{
graphPane.AddCurve(NameList[i], DataSource[i], Colors[i], SymbolType.None);
}
}
///
/// 画柱状图
///
///
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]);
}
graphPane.XAxis.MajorTic.IsBetweenLabels = true;
string[] labels = NameList.ToArray();
graphPane.XAxis.Scale.TextLabels = labels;
graphPane.XAxis.Type = AxisType.Text;
graphPane.Fill = new Fill(Color.White, Color.FromArgb(200, 200, 255), 45.0f);
graphPane.Chart.Fill = new Fill(Color.White, Color.LightGoldenrodYellow, 45.0f);
}
///
/// 画饼图
///
///
private void DrawPie(GraphPane graphPane)
{
graphPane.Fill = new Fill(Color.White,Color.Silver, 45.0f);
graphPane.Legend.Position = LegendPos.Float;
graphPane.Legend.Location = new Location(0.95f, 0.15f, CoordType.PaneFraction, AlignH.Right, AlignV.Top);
graphPane.Legend.FontSpec.Size = 20f;
graphPane.Legend.IsHStack = false;
for (int i = 0; i < Count; i++)
{
graphPane.AddPieSlice(ScaleData[i], Colors[i], Color.White, 45f, 0, NameList[i]);
}
}
///
/// 如果系统出错，显示错误信息
///
///
///
private void DrawMessage(GraphPane graphPane,string message)
{
TextObj text = new TextObj( message, 200, 200);
text.Text = message;
graphPane.GraphObjList.Add(text);
}
#endregion
}
调用方法：
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
DrawPie();
}
private void DrawLine()
{
AnalyticsGraph1.Type = AnalyticsType.Line;
AnalyticsGraph1.Title = "用户访问曲线图";
AnalyticsGraph1.XAxisTitle = "月份";
AnalyticsGraph1.Y AxisTitle = "用户访问数量";
Random rand = new Random();
for (int i = 0; i < 3; i++)
{
ZedGraph.PointPairList ppl = new ZedGraph.PointPairList();
for (double x = 0; x < 5; x += 1.0)
{
double y = rand.NextDouble() * 1000;
ppl.Add(x, y);
}
AnalyticsGraph1.DataSource.Add(ppl);
https://www.doczj.com/doc/929681323.html,List.Add(i.ToString());
}
}
private void DrawBar()
{
AnalyticsGraph1.Type = AnalyticsType.Bar;
AnalyticsGraph1.Title = "用户访问柱状图";
AnalyticsGraph1.XAxisTitle = "月份";
AnalyticsGraph1.YAxisTitle = "用户访问数量";
Random rand = new Random();
for (int i = 0; i < 6; i++)
{
ZedGraph.PointPairList ppl = new ZedGraph.PointPairList();
for (int j = 0; j < 3; j++)
{
double x = rand.Next(10);
double y = rand.NextDouble() * 1000;
ppl.Add(x, y);
}
AnalyticsGraph1.DataSource.Add(ppl);
}
}
private void DrawPie()
{
AnalyticsGraph1.Type = AnalyticsType.Pie;
AnalyticsGraph1.Title = "用户访问饼图";
Random rand = new Random();
for (int i = 0; i < 3; i++)
{
AnalyticsGraph1.ScaleData.Add((i+2) * rand.Next(100));
https://www.doczj.com/doc/929681323.html,List.Add(i.ToString());
}
}
}
本文来自CSDN博客，转载请标明出处：https://www.doczj.com/doc/929681323.html,/lanmao100/archive/2007/10/26/1845620.aspx