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;             }         }