public partial class AttributeQueryForm : Form

    {

        //地图数据

        private AxMapControl mMapControl;

        //选中图层

        private IFeatureLayer mFeatureLayer;



        public AttributeQueryForm(AxMapControl mapControl)

        {

            InitializeComponent();

            this.mMapControl = mapControl;

        }



        private void AttributeQueryForm_Load(object sender, EventArgs e)

        {

            //MapControl中没有图层时返回

            if (this.mMapControl.LayerCount <= 0)

                return;



            //获取MapControl中的全部图层名称，并加入ComboBox

            //图层

            ILayer pLayer;

            //图层名称

            string strLayerName;

            for (int i = 0; i < this.mMapControl.LayerCount; i++)

            {

                pLayer = this.mMapControl.get_Layer(i);

                strLayerName = pLayer.Name;

                //图层名称加入cboLayer

                this.cboLayer.Items.Add(strLayerName);

            }

            //默认显示第一个选项

            this.cboLayer.SelectedIndex = 0;

        }



        private void cboLayer_SelectedIndexChanged(object sender, EventArgs e)

        {

            //获取cboLayer中选中的图层

            mFeatureLayer = mMapControl.get_Layer(cboLayer.SelectedIndex) as IFeatureLayer;

            IFeatureClass pFeatureClass = mFeatureLayer.FeatureClass;

            //字段名称

            string strFldName;