AE实现点击一个要素，并显示其属性

第一步：根据鼠标点击处的点，找到被选中的要素

 1 public IFeature Find2(IPoint pPoint)
 2         {
 3             ITopologicalOperator pTopoOpe = pPoint as ITopologicalOperator;
 4             double dis = m_pMapControl.ActiveView.ScreenDisplay.DisplayTransformation.FromPoints(5);
 5             if (dis < 0.01)
 6                 dis = 0.01;
 7             IGeometry pBuffer = pTopoOpe.Buffer(dis);
 8             pBuffer.SpatialReference = m_pMapControl.Map.SpatialReference;
 9 
10             UIDClass id = new UIDClass();
11             id.Value = "{E156D7E5-22AF-11D3-9F99-00C04F6BC78E}";
12             IEnumLayer pEnumLayer = m_pMapControl.Map.get_Layers(id, true);
13             pEnumLayer.Reset();
14             IFeatureLayer pFLayer = pEnumLayer.Next() as IFeatureLayer;
15 
16             ISpatialFilter pSpatialFilter = new SpatialFilterClass();
17             pSpatialFilter.Geometry = pBuffer;
18             pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
19             pSpatialFilter.WhereClause = "";
20 
21             while (pFLayer != null)
22             {
23                 if (pFLayer.Visible == false)
24                 {
25                     pFLayer = pEnumLayer.Next() as IFeatureLayer;
26                     continue;
27                 }
28                 IFeatureCursor pCursor = pFLayer.Search(pSpatialFilter, false);
29                 IFeature pFeat = pCursor.NextFeature();
30                 if (pFeat != null)
31                 {
32                     return pFeat;
33                 }
34                 System.Runtime.InteropServices.Marshal.ReleaseComObject(pCursor);
35                 pFLayer = pEnumLayer.Next() as IFeatureLayer;
36             }
37             return null;
38         }

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