ArcEngine拖拽加载文件

第一步：设置MapControl的AllowDrop属性为True

第二步：设置MapControl的OldDropEnabled属性为True

第三步：选择MapControl的OnOleDrop事件

第四步：加入如下代码

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.Controls;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.DataSourcesGDB;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Output;
using ESRI.ArcGIS.SystemUI;

namespace WindowsFormsApplication1
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void m_MapControl_OnOleDrop(object sender, IMapControlEvents2_OnOleDropEvent e)
        {
            IDataObjectHelper pDataObjectHelper = e.dataObjectHelper as IDataObjectHelper;
            if (e.dropAction == esriControlsDropAction.esriDropped)
            {
                System.Array array = pDataObjectHelper.GetFiles() as System.Array;
                for (int i = 0; i < array.Length; i++)
                {
                    AddData(array.GetValue(i).ToString());
                }
                m_MapControl.Extent = m_MapControl.FullExtent;
            }
        }

        private void AddData(string filePath)
        {
            string fileExtension = System.IO.Path.GetExtension(filePath);
            switch (fileExtension)
            {
                case ".mxd":
                    {
                        m_MapControl.LoadMxFile(filePath);
                    }
                    break;
                case ".shp":
                    {
                        m_MapControl.AddShapeFile(System.IO.Path.GetDirectoryName(filePath), System.IO.Path.GetFileName(filePath));
                    }
                    break;
                default:
                    {
                        MessageBox.Show("错误");
                    }
                    break;
            }
        }
    }
}

运行结果如下：