4.AE中的缩放，书签

1.书签

private void textBox1_TextChanged(object sender, EventArgs e)
{
if (txtBookmark.Text == "")
{
button1.Enabled = false;
}
else
{
button1.Enabled = true;
}
}

//确定
private void button1_Click(object sender, EventArgs e)
{
m_bookmark = txtBookmark.Text;
txtBookmark.Text = "";
m_check = 1;
this.Close();
}

//取消
private void button2_Click(object sender, EventArgs e)
{
txtBookmark.Text = "";
m_check = 0;
this.Close();
}

具体源码

namespace WindowsFormsApplication1
{
public partial class FrmBookmark : Form
{
private string m_bookmark; //书签名
private int m_check; //是否创建书签
public FrmBookmark()
{
InitializeComponent();
}

private void textBox1_TextChanged(object sender, EventArgs e)
{
if (txtBookmark.Text == "")
{
button1.Enabled = false;
}
else
{
button1.Enabled = true;
}
}
//设置书签名为只读
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; }
}
//确定
private void button1_Click(object sender, EventArgs e)
{
m_bookmark = txtBookmark.Text;
txtBookmark.Text = "";
m_check = 1;
this.Close();
}
//取消
private void button2_Click(object sender, EventArgs e)
{
txtBookmark.Text = "";
m_check = 0;
this.Close();
}

}

#region 添加书签
private void barButtonItem12_ItemClick(object sender, ItemClickEventArgs e)
{
//ICommand pCmmd;
//ITool pTool;
FrmBookmark frmBookMark = new FrmBookmark();
frmBookMark.ShowDialog();
string pName = string.Empty;
int check = frmBookMark.Check;

if (check == 1)
{
pName = frmBookMark.Bookmark;
}
if (string.IsNullOrEmpty(pName)) return;

//书签进行重名判断
IMapBookmarks mapBookmarks = axMapControl1.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 = axMapControl1.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 = axMapControl1.Map as IMapBookmarks;
pMapBookmarks.AddBookmark(pBookmark);

}
#endregion

2.管理书签

具体源码

namespace WindowsFormsApplication1
{
public partial class FrmManageBookmark : Form
{
private IMap _currentMap = null;
Dictionary<string, ISpatialBookmark> pDictionary = new Dictionary<string, ISpatialBookmark>();
IMapBookmarks mapBookmarks = null;
public FrmManageBookmark(IMap pMap)
{
InitializeComponent();
_currentMap = pMap; //获取当前地图
InitControl();
}

//获取空间书签，对tlstBookMark进行初始化
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);
//添加到数据字典
pDictionary.Add(sBookMarkName, pSpatialBookmark);
pSpatialBookmark = enumSpatialBookmarks.Next();
}
}
public FrmManageBookmark()
{
InitializeComponent();
}
//定位
private void button1_Click(object sender, EventArgs e)
{
TreeNode pSelectedNode = treeView1.SelectedNode;
//获得选中的书签对象
ISpatialBookmark pSpatialBM = pDictionary[pSelectedNode.Text];
//缩放到选中书签的视图范围
pSpatialBM.ZoomTo(_currentMap);
IActiveView pActiveView = _currentMap as IActiveView;
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
}
//删除书签
private void button2_Click(object sender, EventArgs e)
{
TreeNode pSelectedNode = treeView1.SelectedNode;
ISpatialBookmark pSpatialBookmark = pDictionary[pSelectedNode.Text];
//删除选中的书签对象
mapBookmarks.RemoveBookmark(pSpatialBookmark);
//删除字典中数据
pDictionary.Remove(pSelectedNode.Text);
//删除树节点
treeView1.Nodes.Remove(pSelectedNode);
treeView1.Refresh();
}

private void button3_Click(object sender, EventArgs e)
{
Close();
}
private void tlstBookMark_MouseDoubleClick(object sender, MouseEventArgs e)
{
//调用定位执行命令
button1.PerformClick();
}

private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{

}
}

#region 管理书签
private void barButtonItem13_ItemClick(object sender, ItemClickEventArgs e)
{
try
{
FrmManageBookmark frmManageBookMark = new FrmManageBookmark(axMapControl1.Map);
frmManageBookMark.ShowDialog();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
#endregion

end：地图缩放

#region 地图浏览放大
private void barButtonItem8_ItemClick(object sender, ItemClickEventArgs e)
{
IEnvelope pEnvelope;
pEnvelope = axMapControl1.Extent;
pEnvelope.Expand(0.5, 0.5, true);//放大2倍
axMapControl1.Extent = pEnvelope;
axMapControl1.ActiveView.Refresh();
}
#endregion
#region 缩小
private void barButtonItem9_ItemClick(object sender, ItemClickEventArgs e)
{
IActiveView pActiveView = axMapControl1.ActiveView;
IPoint centerPoint = new PointClass();
centerPoint.PutCoords((pActiveView.Extent.XMin + pActiveView.Extent.XMax) / 2, (pActiveView.Extent.YMin + pActiveView.Extent.YMax) / 2);
IEnvelope envelope = pActiveView.Extent;
envelope.Expand(1.5, 1.5, true);//和放大区别在于Expand函数参数不同
pActiveView.Extent.CenterAt(centerPoint);
pActiveView.Extent = envelope;
pActiveView.Refresh();

}
#endregion