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

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。