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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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 == 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
}
}
--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", 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);
}
}
}
时间： 2024-08-14 23:50:40