zedgraph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。
  

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