基本教程篇--第三节、第四节DateAxisSampleDemo.cs和TextAxisSampleDemo.cs介绍

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第三节、第四节DateAxisSampleDemo.cs和TextAxisSampleDemo.cs介绍

由于这两个例子很简单也很相似，所以决定还是放到一起来写。按照惯例还是先给出代码和图示。

代码如下：

DateAxisSampleDemo:

using System;

using System.Drawing;

using System.Collections;

using ZedGraph;

namespace ZedGraph.Demo

{

///<summary>

/// Summary description for SimpleDemo.

///</summary>

public class DateAxisSampleDemo : DemoBase

{

public DateAxisSampleDemo() : base( "Code Project Date Axis Sample",

"Date Axis Sample", DemoType.Tutorial )

{

GraphPane myPane = base.GraphPane;

// Set the titles and axis labels

myPane.Title = "My Test Date Graph";

myPane.XAxis.Title = "Date";

myPane.YAxis.Title = "My Y Axis";

// Make up some data points based on the Sine function

PointPairList list = new PointPairList();

for ( int i=0; i<36; i++ )

{

double x = (double) new XDate( 1995, 5, i+11 );

double y = Math.Sin( (double) i * Math.PI / 15.0 );

list.Add( x, y );

}

// Generate a red curve with diamond

// symbols, and "My Curve" in the legend

LineItem myCurve = myPane.AddCurve( "My Curve",

list, Color.Red, SymbolType.Diamond );

// Set the XAxis to date type

myPane.XAxis.Type = AxisType.Date;

base.ZedGraphControl.AxisChange();

}

TextAxisSampleDemo:

using System;

using System.Drawing;

using System.Collections;

using ZedGraph;

namespace ZedGraph.Demo

{

///<summary>

/// Summary description for SimpleDemo.

///</summary>

public class TextAxisSampleDemo : DemoBase

{

public TextAxisSampleDemo() : base( "Code Project Text Axis Sample",

"Text Axis Sample", DemoType.Tutorial )

{

GraphPane myPane = base.GraphPane;

// Set the title and axis labels

myPane.Title = "My Test Date Graph";

myPane.XAxis.Title = "Label";

myPane.YAxis.Title = "My Y Axis";

// Make up some data points

string[] labels = { "USA", "Spain/nMadrid", "Qatar", "Morocco", "UK", "Uganda",

"Cambodia", "Malaysia", "Australia", "Ecuador" };

double[] y = new double[10];

for ( int i=0; i<10; i++ )

y[i] = Math.Sin( (double) i * Math.PI / 2.0 );

// Generate a red curve with diamond

// symbols, and "My Curve" in the legend

LineItem myCurve = myPane.AddCurve( "My Curve",

null, y, Color.Red, SymbolType.Diamond );

//Make the curve smooth

myCurve.Line.IsSmooth = true;

// Set the XAxis to Text type

myPane.XAxis.Type = AxisType.Text;

// Set the XAxis labels

myPane.XAxis.TextLabels = labels;

// Set the labels at an angle so they don't overlap

myPane.XAxis.ScaleFontSpec.Angle = 40;

base.ZedGraphControl.AxisChange();

}

看到前两节的介绍，这里的代码就应该很简单了，我要说的只有两个类XDate和TextLabel这个属性。

首先XDate就相当于msdn中的DateTime这个类，是个时间日期类，也是具有多个构造函数，XDate( 1995, 5, i+11 )是按年月日来初始化的。

第二个就是TextLabel属性，它主要是把Label的内容显示在Pane上。如TextAxisSampleDemo的X轴。