DevExpress之ChartControl实现饼状图百分比演示实例

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：

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。