打开、保存、另存mxd文件

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

using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Display;

1.全局变量
 IMapDocument mapDoc;
2.在构造函数里面初始化全局变量
 mapDoc = new MapDocumentClass();
3.打开mxd文件
    Private void OpenMxd()

{

 try
            {
                //打开文件对话框选取MXD文件
                OpenFileDialog openFileDialog2;
                openFileDialog2 = new OpenFileDialog();
                openFileDialog2.Title = "打开mxd文件";
                openFileDialog2.Filter = "地图文档(*.mxd)|*.mxd";
                openFileDialog2.ShowDialog();
                string sFilePath = openFileDialog2.FileName;

                //将数据载入pMapDocument并与map控件联系起来
                mapDoc.Open(sFilePath, "");
                axMapControl1.Map.ClearLayers();
                int i;
                for (i = 0; i <= mapDoc.MapCount - 1; i++)
                {
                    //一个IMapDocument对象中可能有多个Map对象，遍历每个map对象
                    axMapControl1.Map = mapDoc.get_Map(i);

                }
                //刷新地图
                axMapControl1.Refresh();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }

}
4.保存mxd文件
private void SaveMxd()
{
             if (mapDoc.get_IsReadOnly(mapDoc.DocumentFilename) == true)
            {
                MessageBox.Show("这个文件是只读的!");
                return;
            }
            mapDoc.Save(mapDoc.UsesRelativePaths, true);
            MessageBox.Show("保存成功!");
}

5.另存为mxd文件
private void SaveAsMxd()
{
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Title = "另存mxd文件";
            saveFileDialog1.Filter = "地图文档(*.mxd)|*.mxd";
            saveFileDialog1.ShowDialog();
            string sFilePath = saveFileDialog1.FileName;
            if (sFilePath == "")
            {
                return;
            }
            if (sFilePath == mapDoc.DocumentFilename)
            {
                SaveDocument();
            }
            else
            {
                mapDoc.SaveAs(sFilePath, true, true);
                MessageBox.Show("另存成功!");
            }
}