Arcengine获取图层某个字段唯一值的方法
private ArrayList GetLayerUniqueFieldValueByDataStatistics(IFeatureLayer rnrnpFeatureLayer, string fieldName)rn rn ArrayList arrValues = new ArrayList();rn IQueryFilter p
private ArrayList GetLayerUniqueFieldValueByDataStatistics(IFeatureLayer rnrnpFeatureLayer, string fieldName)rn rn ArrayList arrValues = new ArrayList();rn IQueryFilter p