ZedGraph控件第三节、第四节

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