public void TestTheme3DRangeItem(DatasetVector targetDataset, Scene sceneObject)
{
    //进行三维地图场景的设置
    sceneObject.Atmosphere.IsVisible = true;

    //构建三维分段专题图子项，并添加到三维分段专题图中
    GeoStyle3D itemStyle1 = new GeoStyle3D();
    itemStyle1.FillForeColor = Color.FromArgb(255, 190, 189);
    Theme3DRangeItem theme3DRangeItem1 = new Theme3DRangeItem(100000000, 120000000, itemStyle1, "大于一亿");

    GeoStyle3D itemStyle2 = new GeoStyle3D();
    itemStyle2.FillForeColor = Color.FromArgb(255, 235, 189);
    Theme3DRangeItem theme3DRangeItem2 = new Theme3DRangeItem(10000000, 100000000, itemStyle2, "大于一千万");

    GeoStyle3D itemStyle3 = new GeoStyle3D();
    itemStyle3.FillForeColor = Color.FromArgb(214, 255, 115);
    Theme3DRangeItem theme3DRangeItem3 = new Theme3DRangeItem(1000000, 10000000, itemStyle3, "大于一百万");

    GeoStyle3D itemStyle4 = new GeoStyle3D();
    itemStyle4.FillForeColor = Color.FromArgb(214, 255, 189);
    Theme3DRangeItem theme3DRangeItem4 = new Theme3DRangeItem(0, 1000000, itemStyle4, "小于一百万");

    Theme3DRange theme3DRange = new Theme3DRange();
    theme3DRange.AddToHead(theme3DRangeItem1);
    theme3DRange.AddToHead(theme3DRangeItem2);
    theme3DRange.AddToHead(theme3DRangeItem3);
    theme3DRange.AddToHead(theme3DRangeItem4);
    theme3DRange.RangeExpression = "Pop_1994";

    //将三维分段专题图应用到数据中，并显示在三维场景中
    Layer3DDataset layer3DDatasetRange = sceneObject.Layers.Add(targetDataset, theme3DRange, true);
    layer3DDatasetRange.UpdateData();
    sceneObject.Refresh();
}