ArcGIS Engine开发之书签加载

ArcGIS中书签是保存特定视图范围的快捷方式。使用书签保存关注的视图范围，可在需要时快速定位、查看与浏览。书签功能主要用到IMapBookmarks、ISpatialBookmark和IAOIBookmark三个接口。

通过IMapBookmarks接口的Bookmarks属性可以得到地图文档中已经存在的所有书签对象，通过该接口的AddBookmark和RemoveBookmark方法可以对书签进行添加和删除。

ISpatialBookmark接口定义所有空间书签的共同功能，特别是书签的Name属性和ZoomTo方法。Name属性定义了书签的名字，通过ZoomTo方法可跳转到书签位置点。

IAOIBookmark接口继承自ISpatialBookmark接口，新增了Location属性，用于存储地图中感兴趣的范围。

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1、添加书签

新建一个窗体用于设置书签名称，窗体界面如图：

实现：

public partial class FormBookMarks : DevExpress.XtraEditors.XtraForm
    {
        /// <summary>
        /// 定义全局变量
        /// </summary>
        ///
        private string m_bookmark;//书签名
        private int m_check;//是否创建书签
        public FormBookMarks()
        {
            InitializeComponent();
        }

        private void FormBookMarks_Load(object sender, EventArgs e)
        {
            //设置确定按钮一开始的不可用性
            btnOk.Enabled = false;
        }
        /// <summary>
        /// 确定按钮
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnOk_Click(object sender, EventArgs e)
        {
            m_bookmark = txtBookMarks.Text;
            txtBookMarks.Text = "";
            m_check = ;
            this.Close();
        }
        //取消按钮
        private void btnCel_Click(object sender, EventArgs e)
        {
            txtBookMarks.Text = "";
            m_check = ;
            this.Close();
        }
        //设置书签为只读
        public string Bookmark
        {
            get { return m_bookmark; }
        }
        //是否创建书签变量为只读
        public int Check
        {
            get { return m_check; }
        }
        /// <summary>
        /// 在TextBox中文本改变事件中设置按钮的可用性
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void txtBookMarks_TextChanged(object sender, EventArgs e)
        {
            if (txtBookMarks.Text == "")
            {
                btnOk.Enabled = false;
            }
            else
            {
                btnOk.Enabled = true;
            }
        }

mainForm中的代码

 /// <summary>
        /// 添加书签的操作
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnOpenBookMark_ItemClick(object sender, ItemClickEventArgs e)
        {
            FormBookMarks frmBookMark = new FormBookMarks();
            frmBookMark.ShowDialog();
            string pName = string.Empty;
            int check = frmBookMark.Check;

            if (check == )
            {
                pName = frmBookMark.Bookmark;
            }
            if (string.IsNullOrEmpty(pName)) return;

            //书签进行重名判断
            IMapBookmarks mapBookmarks= mainMapControl.Map as IMapBookmarks;
            IEnumSpatialBookmark enumSpatialBookmarks = mapBookmarks.Bookmarks;
            enumSpatialBookmarks.Reset();
            ISpatialBookmark pSpatialBookmark;

            while ((pSpatialBookmark = enumSpatialBookmarks.Next()) != null)
            {
                if (pName == pSpatialBookmark.Name)
                {
                    DialogResult dr = MessageBox.Show("此书签名已存在！是否替换？", "提示", MessageBoxButtons.YesNoCancel);
                    if (dr == DialogResult.Yes)
                    {
                        mapBookmarks.RemoveBookmark(pSpatialBookmark);
                    }
                    else if (dr == DialogResult.No)
                    {
                        frmBookMark.ShowDialog();
                    }
                    else
                    {
                        return;
                    }
                }
            }

            //获取当前地图的对象
            IActiveView pActiveView = mainMapControl.Map as IActiveView;
            //创建一个新的书签并设置其位置范围为当前视图的范围
            IAOIBookmark pBookmark = new AOIBookmarkClass();
            pBookmark.Location = pActiveView.Extent;
            //获得书签名
            pBookmark.Name = pName;
            //通过IMapBookmarks接口访问当前地图书签集，添加书签到地图的书签集中
            IMapBookmarks pMapBookmarks = mainMapControl.Map as IMapBookmarks;
            pMapBookmarks.AddBookmark(pBookmark);
        }
        /// <summary>
        /// 书签管理
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnOpenMangerBookMark_ItemClick(object sender, ItemClickEventArgs e)
        {

            try
            {
                FormMangerBookMark frmManageBookmark = new FormMangerBookMark(mainMapControl.Map);
                frmManageBookmark.ShowDialog();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }

新建书签管理窗体，如图：

代码：

 public partial class FormMangerBookMark : DevExpress.XtraEditors.XtraForm
    {
        /// <summary>
        /// 定义全局变量
        /// </summary>
        ///
        private IMap _currentMap = null;
        Dictionary<string, ISpatialBookmark> pDictionary = new Dictionary<string, ISpatialBookmark>();
        IMapBookmarks mapBookmarks = null;

        public FormMangerBookMark(IMap pMap)
        {
            InitializeComponent();
            _currentMap = pMap;//获取当前地图
            InitControl();
        }
        /// <summary>
        /// 获取空间书签，对ListBookmark进行初始化
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        ///
        private void InitControl()
        {
            mapBookmarks = _currentMap as IMapBookmarks;
            IEnumSpatialBookmark enumSpatialBookmarks = mapBookmarks.Bookmarks;
            enumSpatialBookmarks.Reset();
            ISpatialBookmark pSpatialBookmark = enumSpatialBookmarks.Next();

            string sBookMarkName = string.Empty;
            while (pSpatialBookmark != null)
            {
                sBookMarkName = pSpatialBookmark.Name;
                //增加树节点
                treeView1.Nodes.Add(sBookMarkName );
              //  advTree1 . Nodes.Add(sBookMarkName);
                //添加到数据字典
                pDictionary.Add(sBookMarkName, pSpatialBookmark);
                pSpatialBookmark = enumSpatialBookmarks.Next();
            }
        }
        /// <summary>
        ///
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void FormMangerBookMark_Load(object sender, EventArgs e)
        {

        }
        /// <summary>
        /// 定位按钮的功能
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPosition_Click(object sender, EventArgs e)
        {

              //DevComponents.AdvTree.Node  pSelectedNode =advTree1.SelectedNode;
            TreeNode pSelectedNode = treeView1.SelectedNode;
            //获取书签中的书签范围
              ISpatialBookmark pSpatialBM = pDictionary[pSelectedNode.Text];
            //缩放到选中的范围
              pSpatialBM.ZoomTo(_currentMap);
              IActiveView pActiveView = _currentMap as IActiveView;
              pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
        }
        /// <summary>
        /// 删除书签的操作
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnDeleterBookMark_Click(object sender, EventArgs e)
        {
           // DevComponents.AdvTree.Node pSelectedNode = advTree1.SelectedNode;
            TreeNode pSelectedNode = treeView1.SelectedNode;
            ISpatialBookmark pSpatialBM=pDictionary [pSelectedNode .Text ];
            //删除选中的书签对象
            mapBookmarks.RemoveBookmark(pSpatialBM);
            //删除字典中数据
            pDictionary.Remove(pSelectedNode.Text );
            //删除树节点
          treeView1.Nodes.Remove(pSelectedNode );
          treeView1.Refresh();
        }
        /// <summary>
        /// 取消按钮的设置
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnCloseBookMark_Click(object sender, EventArgs e)
        {
            Close();
        }
        /// <summary>
        /// 鼠标双击定位设置
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>

        private void treeView1_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            btnPosition.PerformClick();
        }