本文实例讲述了DevExpress中ChartControl实现饼状图百分比演示的方法。分享给大家供大家参考。具体实现方法如下：

关键代码如下：

复制代码 代码如下:using System;

using System.Data;

using System.Windows.Forms;

using DevExpress.XtraCharts;

namespace DevExpressChart

{

public partial class winPieSeriesView : Form

{

public winPieSeriesView()

{

InitializeComponent();

}

private DataTable CreateChartData()

{

DataTable table = new DataTable("Table1");

table.Columns.Add("Name", typeof(String));

table.Columns.Add("Value", typeof(Int32));

table.Rows.Add(new object[] { "A", 10 });

table.Rows.Add(new object[] { "B", 20 });

table.Rows.Add(new object[] { "C", 40 });

table.Rows.Add(new object[] { "D", 20 });

table.Rows.Add(new object[] { "E", 30 });

return table;

}

private void winPieSeriesView_Load(object sender, EventArgs e)

{

BuilderDevChart();

}

private void BuilderDevChart()

{

Series _pieSeries = new Series("测试", ViewType.Pie);

_pieSeries.ValueDataMembers[0] = "Value";

_pieSeries.ArgumentDataMember = "Name";

_pieSeries.DataSource = CreateChartData();

chartControl1.Series.Add(_pieSeries);

//----------------------------------------

_pieSeries.LegendPointOptions.PointView = PointView.ArgumentAndValues;

_pieSeries.SetPiePercentage();

}

}

}

/// <summary>

/// 饼状Series设置成百分比显示

/// </summary>

/// <param name="series">Series</param>

public static void SetPiePercentage(this Series series)

{

if (series.View is PieSeriesView)

{

((PiePointOptions)series.PointOptions).PercentOptions.ValueAsPercent = true;

((PiePointOptions)series.PointOptions).ValueNumericOptions.Format = NumericFormat.Percent;

((PiePointOptions)series.PointOptions).ValueNumericOptions.Precision = 0;

}

}

运行效果如下图所示：

希望本文所述对大家的C#程序设计有所帮助。