public void TestTheme3DUniqueItem(DatasetVector targetDataset,Scene sceneObject)
{
    //进行三维地图场景的设置
    sceneObject.Atmosphere.IsVisible = true;

    //构建三维单值专题图子项，并添加到三维单值专题图中
    GeoStyle3D itemStyle1 = new GeoStyle3D();
    itemStyle1.FillForeColor = Color.FromArgb(255, 190, 189);
    Theme3DUniqueItem theme3DUniqueItem1 = new Theme3DUniqueItem("中华人民共和国", itemStyle1);

    GeoStyle3D itemStyle2 = new GeoStyle3D();
    itemStyle2.FillForeColor = Color.FromArgb(255, 235, 189);
    Theme3DUniqueItem theme3DUniqueItem2 = new Theme3DUniqueItem("印度", itemStyle2);

    GeoStyle3D itemStyle3 = new GeoStyle3D();
    itemStyle3.FillForeColor = Color.FromArgb(214, 255, 115);
    Theme3DUniqueItem theme3DUniqueItem3 = new Theme3DUniqueItem("美国", itemStyle3);
    Theme3DUnique theme3DUnique = new Theme3DUnique();
    theme3DUnique.Add(themeUnique3DItem1);
    theme3DUnique.Add(themeUnique3DItem2);
    theme3DUnique.Add(themeUnique3DItem3);
    theme3DUnique.UniqueExpression = "Country";
    GeoStyle3D defaultStyle = new GeoStyle3D();
    defaultStyle.FillForeColor = Color.FromArgb(214, 255, 189);
    theme3DUnique.DefaultStyle = defaultStyle;

    //将三维单值专题图应用到数据中，并显示在三维场景中
    Layer3DDataset layer3DDatasetUnique = sceneObject.Layers.Add(targetDataset, theme3DUnique, true);
    layer3DDatasetUnique.UpdateData();
    sceneObject.Refresh();
}