[转载]利用 IIdentifyDialog 模拟ArcMap工具里面 Identify功能进行要素查询 (2010-10-09 22:02:49)
标签： 杂谈 分类： 学习
利用 IIdentifyDialog 模拟ArcMap工具里面 Identify功能进行要素查询
利用AE提供的IIdentifyDialog，创建class identifyTool 。然后在程序里面就可以在鼠标点击按钮功能下，模拟实现ArcMap工具里面 Identify功能。
类生成代码如下：
1 public sealed class identifyTool : BaseTool
2 {
3 IHookHelper pHookHelper = new HookHelperClass();
4 public identifyTool()
5 {
6 m_cursor = new System.Windows.Forms.Cursor(@"..\..\Resources\Identify_md.cur");
7
8 }
9
10 public override void OnCreate(object hook)
11 {
12 pHookHelper.Hook = hook;
13 }
14 public override void OnMouseDown(int Button, int Shift, int X, int Y)
15 {
16
17 IActiveView pActiveView;
18 IIdentifyDialog pIdentifyDialog;
19 IIdentifyDialogProps pIdentifyDialogProps;
20 IEnumLayer pEnumLayer;
21 ILayer pLayer;
22
23 pActiveView = pHookHelper.ActiveView;
24
25 pIdentifyDialog = new IdentifyDialogClass();
26 pIdentifyDialogProps = pIdentifyDialog as IIdentifyDialogProps;
27 pIdentifyDialog.Map = pHookHelper.ActiveView.FocusMap;
28 pIdentifyDialog.Display = pActiveView.ScreenDisplay;
29
30 pIdentifyDialog.ClearLayers();
31
32 pEnumLayer = pIdentifyDialogProps.Layers;
33 pEnumLayer.Reset();
34 pLayer = pEnumLayer.Next();
35 while (pLayer != null)
36 {
37 pIdentifyDialog.AddLayerIdentifyPoint(pLayer, X, Y);
38 pLayer = pEnumLayer.Next();
39 }
40 pIdentifyDialog.Show();
41 }
42 }
其中m_cursor用来设置鼠标样式。
IIdentifyDialog要设置其Map和Display属性。
（参考ESRI中国社区）