图层和属性表字段添加进ComBox

效果图

源码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.Controls;

namespace 图层和属性表字段添加进comBox
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.EngineOrDesktop);
            InitializeComponent();
        }

        //操作图层
        IFeatureLayer featureLayer = null;
        //特征类集
        IFeatureClass featureClass = null;

        //程序开始运行时加载地图文档
        private void Form1_Load(object sender, EventArgs e)
        {
            LoadMapDocument();
        }

        //自定义加载地图文档
        private void LoadMapDocument()
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Title = "打开地图文档";
            openFileDialog.Filter = "Map Documents(*.mxd)|*.mxd|Shapfile(*.shp)|*.shp|所有文件(*.*)|*.*";
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                String filePath = openFileDialog.FileName;
                if (axMapControl1.CheckMxFile(filePath))
                {
                    //在加载地图文档前，先清空图层
                    axMapControl1.Map.ClearLayers();
                    axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;
                    axMapControl1.LoadMxFile(filePath);
                    axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
                }
                else
                {
                    MessageBox.Show(filePath + "不是有效的地图文档");
                }
            }
        }

        //当mapcontrol中的图层数据改变时，将新的图层加到图层列表中
        private void axMapControl1_OnMapReplaced(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMapReplacedEvent e)
        {
            //要在下拉列表中添加新数据，先清空之前的数据
            comboBox1.Items.Clear();
            //一旦mapcontrol中的图层被更新，就将图层名添加到下拉列表框
            for (int i = 0; i < axMapControl1.LayerCount; i++)
            {
                //生成一个图层，并将mapcontrol中的指定图层传入
                ILayer layer = axMapControl1.get_Layer(i);
                //将图层名称添加进列表中
                comboBox1.Items.Add(layer.Name);
            }
            //下拉列表框默认显示第一项
            comboBox1.SelectedIndex = 0;
        }

        //当ComBox中当前显示的文字改变时，执行选择图层操作，并让Map选中当前combox显示的图层
        private void comboBox1_TextChanged(object sender, EventArgs e)
        {
            //判断combox当前显示是否为空
            if (comboBox1.Text != "")
            {
                //获取combox中当前显示的图层，并传给操作图层
                featureLayer = axMapControl1.get_Layer(comboBox1.SelectedIndex) as IFeatureLayer;
                //将操作图层的图层类传给特征类集
                featureClass = featureLayer.FeatureClass;

                //选中图层中的某一个元素，此方法缺陷是不能够指定选择属性表中的哪一个行元素
                //IFeature feature = featureClass.GetFeature(0);
                //axMapControl1.Map.ClearSelection();
                //axMapControl1.Map.SelectFeature(featureLayer, feature);
                //axMapControl1.Refresh();

                //图层属性表中的字段名称
                String fieldName;
                //清空列表框中已有的字段
                comboBox2.Items.Clear();
                //将指定图层的属性表中的字段添加到列表框中,属性表在特征类集中获得
                for (int i = 0; i < featureClass.Fields.FieldCount; i++)
                {
                    //取得指定属性表中的指定字段的名称
                    fieldName = featureClass.Fields.get_Field(i).Name;
                    comboBox2.Items.Add(fieldName);
                }

                //下拉列表框默认显示第一个选项
                comboBox2.SelectedIndex = 0;
            }
        }
    }
}