/// <summary>
/// 获取海图图层并查询选中的海图物标的信息。
/// </summary>
private void LayerChartExample()
{
    //获取海图图层
    LayerChart layerChart = (LayerChart)m_mapControl.Map.Layers[0];

    //获取海图图层上被选中的物标信息数组
    ChartObjectInfo[] chartObjectInfos = layerChart.SelectionInfos;

    //遍历选中的物标信息数组，获取物标的基本信息
    if (chartObjectInfos.Length > 0)
    {
        ChartObjectInfo chartObjectInfo;
        for (Int32 i = 0; i < chartObjectInfos.Length; i++)
        {
            chartObjectInfo = chartObjectInfos[i];

            //获取物标的本地化名称
            String name = chartObjectInfo.LocalName;
            //获取物标的 RCID 标识
            Int64 featureID = chartObjectInfo.FeatureID;
            //获取物标的物标编码
            Int32 code = chartObjectInfo.Code;
            //获取物标的几何对象类型
            GeometryType type = chartObjectInfo.GeometryType;

            //还可以通过 ChartObjectInfo 类的其他属性获取物标简称、机构简称、水深
            //值等信息
            String Infos = "第" + (i + 1) + "个物标\n名称：" + name + "\n物标编码："
                + code + "\nRCID：" + featureID + "\n几何对象类型：" + type + "\n";

            //获取 S-57 标准中定义的物标属性信息，包括属性的简称和字段值
            ChartAttributeInfo[] chartAttributeInfos = chartObjectInfo.S57Attributes;
            ChartAttributeInfo chartAttributeInfo;
            String attributeInfo;
            for (Int32 j = 0; j < chartAttributeInfos.Length; j++)
            {
                chartAttributeInfo = chartAttributeInfos[j];
                attributeInfo = "属性简称：" + chartAttributeInfo.Acronym + "  值："
                    + chartAttributeInfo.Value + "\n";
                Infos += attributeInfo;
            }

            //输出物标信息
            Console.WriteLine(Infos);
        }
    }
}