Sorry for my english.

There two piechart in one picture, and the ChartType is Composite mode.

Problem appears, plz see the following picture:

Can i change the "Others" to a custom letter, such as "Other datas,<1%".

I try to set it as:
webchart.PieChart.OthersCategoryPercent = 1;
webchart.PieChart.OthersCategoryText = "Other datas,<1%";

but the "Others" still appears, nothing has been changed.

All source code:

    private Infragistics.WebUI.UltraWebChart.UltraChart GetChart(DataTable table1, DataTable table2, string DW, string year)
    {
        UltraChart webchart = new Infragistics.WebUI.UltraWebChart.UltraChart();//实例化对象
        webchart.ChartType = Infragistics.UltraChart.Shared.Styles.ChartType.Composite;//指定webchart的类型为混合型
        //创建area
        ChartArea area1 = new Infragistics.UltraChart.Resources.Appearance.ChartArea();//创建chartarea
        ChartArea area2 = new Infragistics.UltraChart.Resources.Appearance.ChartArea();//创建chartarea
        area1.Bounds = new System.Drawing.Rectangle(12, 30, 275, 220);//设置area的位置大小
        area2.Bounds = new System.Drawing.Rectangle(320, 30, 275, 220);
        area1.Border.Thickness = 0;//设置边框线不显示
        area2.Border.Thickness = 0;
        webchart.CompositeChart.ChartAreas.Add(area1);
        webchart.CompositeChart.ChartAreas.Add(area2);

        //创建Series
        NumericSeries series1 = new Infragistics.UltraChart.Resources.Appearance.NumericSeries();//创建Series       
        series1.Data.DataSource = table1;
        series1.Data.LabelColumn = "类型";
        series1.Data.ValueColumn = "数值";
        webchart.CompositeChart.Series.Add(series1);
        if (GetSumCount(table1, "数值") == 0)
        {
            EmptyDataShow(webchart, 30, 46);//无数据显示注释信息的位置
        }

        NumericSeries series2 = new Infragistics.UltraChart.Resources.Appearance.NumericSeries();//创建Series
        series2.Data.DataSource = table2;
        series2.Data.LabelColumn = "类型";
        series2.Data.ValueColumn = "数值";
        webchart.CompositeChart.Series.Add(series2);
        if (GetSumCount(table2, "数值") == 0)
        {
            EmptyDataShow(webchart, 70, 46);//无数据显示注释信息的位置
        }

        //创建layer
        ChartLayerAppearance layer1 = new Infragistics.UltraChart.Resources.Appearance.ChartLayerAppearance();
        layer1.ChartType = Infragistics.UltraChart.Shared.Styles.ChartType.PieChart;//指定为饼图
        layer1.ChartArea = area1;
        layer1.Series.Add(series1);
        webchart.CompositeChart.ChartLayers.Add(layer1);

        ChartLayerAppearance layer2 = new Infragistics.UltraChart.Resources.Appearance.ChartLayerAppearance();
        layer2.ChartType = Infragistics.UltraChart.Shared.Styles.ChartType.PieChart;//指定为饼图
        layer2.ChartArea = area2;
        layer2.Series.Add(series2);
        webchart.CompositeChart.ChartLayers.Add(layer2);

        #region 指定Legend并指定显示位置
        CompositeLegend legend1 = new CompositeLegend();
        legend1.ChartLayers.Add(layer1);
        legend1.Bounds = new System.Drawing.Rectangle(35, 11, 15, 20);//设置位置
        legend1.BoundsMeasureType = Infragistics.UltraChart.Shared.Styles.MeasureType.Percentage;//百分比显示位置
        legend1.PE.ElementType = Infragistics.UltraChart.Shared.Styles.PaintElementType.Gradient;
        legend1.PE.FillGradientStyle = Infragistics.UltraChart.Shared.Styles.GradientStyle.ForwardDiagonal;
        legend1.PE.Fill = System.Drawing.Color.CornflowerBlue;
        legend1.PE.FillStopColor = System.Drawing.Color.Transparent;
        legend1.Border.CornerRadius = 5;
        legend1.Border.Thickness = 0;
        webchart.CompositeChart.Legends.Add(legend1);

        CompositeLegend legend2 = new CompositeLegend();
        legend2.ChartLayers.Add(layer2);
        legend2.Bounds = new System.Drawing.Rectangle(80, 11, 15, 20);//设置位置
        legend2.BoundsMeasureType = Infragistics.UltraChart.Shared.Styles.MeasureType.Percentage;//百分比显示位置
        legend2.PE.ElementType = Infragistics.UltraChart.Shared.Styles.PaintElementType.Gradient;
        legend2.PE.FillGradientStyle = Infragistics.UltraChart.Shared.Styles.GradientStyle.ForwardDiagonal;
        legend2.PE.Fill = System.Drawing.Color.CornflowerBlue;
        legend2.PE.FillStopColor = System.Drawing.Color.Transparent;
        legend2.Border.CornerRadius = 5;
        legend2.Border.Thickness = 0;
        webchart.CompositeChart.Legends.Add(legend2);
        #endregion

        webchart.Width = 700;
        webchart.TitleTop.Text = year + "“" + DW + "” PieChart";
        webchart.TitleTop.Font = new System.Drawing.Font("Arial", 10F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
        webchart.TitleTop.HorizontalAlign = System.Drawing.StringAlignment.Center;
        webchart.ColorModel.ModelStyle = Infragistics.UltraChart.Shared.Styles.ColorModels.CustomLinear;//指定生成图的颜色
        webchart.ColorModel.ColorBegin = System.Drawing.Color.DarkGoldenrod;
        webchart.ColorModel.ColorEnd = System.Drawing.Color.Navy;
        webchart.ColorModel.Skin.ApplyRowWise = true;
        webchart.ColorModel.AlphaLevel = 150;
        webchart.CrossHairColor = System.Drawing.Color.Blue;
        webchart.EnableViewState = false;
        //webchart.Legend.FormatString = "<ITEM_LABEL>（<DATA_VALUE:##>个）";
        webchart.EmptyChartText = "No data！";
        webchart.PieChart.OthersCategoryPercent = 1;
        webchart.PieChart.OthersCategoryText = "Other datas,<1%";
        return webchart;
}