AE - 01.空间书签的创建及调用

流程图

引用类库及接口描述

引用类库：

using ESRI.ArcGIS.Carto;

接口：

1. IMapBookmarks接口：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。
2. 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。
3. IAOIBookmark接口：继承自ISpatialBookmark接口，新增了Location属性，存储地图中感兴趣范围。

步骤

步骤1：添加控件

步骤2：给控件添加事件，设置删除Button的可见性

步骤3：封装功能

步骤4：运行实现

代码

七、代码

创建书签

/// <summary>
/// 创建书签
/// </summary>
public Boolean CreatBookmark(string sBookmarkName)
{
    Console.WriteLine(sBookmarkName);
    IAOIBookmark aoiBookmark = new AOIBookmark();
    if (aoiBookmark != null)
    {
        aoiBookmark.Location = mapControl.ActiveView.Extent;
        aoiBookmark.Name = sBookmarkName;
    }

    IMapBookmarks bookmarks = mapControl.Map as IMapBookmarks;
    if (bookmarks != null)
    {
        bookmarks.AddBookmark(aoiBookmark);
        cmb_Bookmark.Items.Add(aoiBookmark.Name);
        return true;
    }
    return false;
   }

监听结束书签列表

/// <summary>
/// 监听结束书签列表
/// </summary>
public Boolean oneBookmark(string name)
{
    IMapBookmarks bookmarks = mapControl.Map as IMapBookmarks;
    IEnumSpatialBookmark enumSpatialBookmark = bookmarks.Bookmarks;

    enumSpatialBookmark.Reset();
    ISpatialBookmark spatialBookmark = enumSpatialBookmark.Next();
    while (spatialBookmark != null)
    {
        if (name == spatialBookmark.Name)
        {
            return false;
        }

        spatialBookmark = enumSpatialBookmark.Next();
    }
    return true;
  }

选中书签列表item

private void cmb_Bookmark_SelectedIndexChanged(object sender, EventArgs e)
{

IMapBookmarks bookmarks = mapControl.Map as IMapBookmarks;
IEnumSpatialBookmark enumSpatialBookmark = bookmarks.Bookmarks;

enumSpatialBookmark.Reset();
ISpatialBookmark spatialBookmark = enumSpatialBookmark.Next();
while (spatialBookmark != null)
{
    string index = cmb_Bookmark.SelectedIndex.ToString();
    string bm_name = cmb_Bookmark.Items[Convert.ToInt32(index)].ToString();
    //Console.WriteLine(bm_name + " "+ spatialBookmark.Name);

    if (bm_name == spatialBookmark.Name)
    {
        spatialBookmark.ZoomTo((IMap)mapControl.ActiveView);
        mapControl.ActiveView.Refresh();
        break;
    }

    spatialBookmark = enumSpatialBookmark.Next();
}

btn_bmDEL.Visible = true;
but_addbm.Visible = false;

}

添加书签

private void but_addbm_Click(object sender, EventArgs e)
{
        addBookmark add = new addBookmark(this);
        add.Show();
  }

删除书签

private void btn_bmDEL_Click(object sender, EventArgs e)
{
        cmb_Bookmark.Items.Remove(cmb_Bookmark.SelectedItem);
        cmb_Bookmark.Text = "";
        if (cmb_Bookmark.Items.Count == 0)
            cmb_Bookmark.Text = "无书签";
        btn_bmDEL.Visible = false;
        but_addbm.Visible = true;
   }