DevExpress之ChartControl实现饼状图百分比演示实例_C#教程_脚本之家

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();
        }
    }
}

        ///

        /// 饼状Series设置成百分比显示
        ///

        /// Series
        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;
            }
        }