1、鼠标点做个缓冲距ESRI.ArcGIS.Geometry.ITopologicalOperator topologicalOperator;
topologicalOperator = (ITopologicalOperator)pt;
IGeometry pGeo = topologicalOperator.Buffer(距离);//10?或是其它
2、
// create a spatial query filter
ESRI.ArcGIS.Geodatabase.ISpatialFilter spatialFilter = new ESRI.ArcGIS.Geodatabase.SpatialFilterClass();
// specify the geometry to query with
spatialFilter.Geometry = pGeo ;//注意哈 几何要素
// specify the type of spatial operation to use
spatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;//在注意啊 空间关系
ESRI.ArcGIS.Geodatabase.IFeatureCursor featureCursor = featureClass.Search(spatialFilter, false);