public bool QueryInter(string srcLayerName, string tgtLayerName, IMap iMap, esriSpatialRelationEnum spatialRel)
{
DataOperator dataOperator = new DataOperator(iMap);
IFeatureLayer iSrcLayer = (IFeatureLayer)dataOperator.GetLayerByName(srcLayerName);
IFeatureLayer iTgtLayer = (IFeatureLayer)dataOperator.GetLayerByName(tgtLayerName);
IGeometry geom;
IFeature feature;
IFeatureCursor featureCursor;
IFeatureClass srcFeatClass;
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = "CONTINENT='Asia'";
featureCursor = iTgtLayer.FeatureClass.Search(queryFilter, false);
feature = featureCursor.NextFeature();
geom = feature.Shape;
srcFeatClass = iSrcLayer.FeatureClass;
ISpatialFilter spatialFilter = new SpatialFilter();
spatialFilter.Geometry = geom;
spatialFilter.WhereClause = "POPULATION=1060000";
spatialFilter.SpatialRel = (esriSpatialRelEnum)spatialRel;
IFeatureSelection featureSelect = (IFeatureSelection)iSrcLayer;
featureSelect.SelectFeatures(spatialFilter, esriSelectionResultEnum.esriSelectionResultNew, false);
return(true);
}
public bool QueryIntersect(string srcLayerName, string tgtLayerName,
IMap iMap, esriSpatialRelationEnum spatialRel)
{
DataOperator dataOperator = new DataOperator(iMap);
//Get layer by name
IFeatureLayer iSrcLayer = (IFeatureLayer)dataOperator.GetLayerByName(srcLayerName);
IFeatureLayer iTgtLayer = (IFeatureLayer)dataOperator.GetLayerByName(tgtLayerName);
//using query filter to get geom
IGeometry geom;
IFeature feature;
IFeatureCursor featCursor;
IFeatureClass srcFeatClass;
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = "CONTINENT='Asia'"; //set query clause
featCursor = iTgtLayer.FeatureClass.Search(queryFilter, false);
feature = featCursor.NextFeature();
geom = feature.Shape;
//city attributes filter
srcFeatClass = iSrcLayer.FeatureClass;
ISpatialFilter spatialFilter = new SpatialFilter();
spatialFilter.Geometry = geom;
spatialFilter.WhereClause = "POP_RANK>5";
spatialFilter.SpatialRel = (ESRI.ArcGIS.Geodatabase.esriSpatialRelEnum)spatialRel;
//select features
IFeatureSelection featureSelection = (IFeatureSelection)iSrcLayer;
featureSelection.SelectFeatures(spatialFilter, esriSelectionResultEnum.esriSelectionResultNew, false);
ISelectionSet selectionSet = featureSelection.SelectionSet;
ICursor cursor;
selectionSet.Search(null, true, out cursor);
IFeatureCursor featureCursor = cursor as IFeatureCursor;
if (selectionSet.Count > 0)
{
DataBoard dataBoard = new DataBoard(iMap, dataOperator.GetDataTable(featureCursor, iSrcLayer));
dataBoard.cbEnabledFalse();
dataBoard.Show();
}
return(true);
}
public DataTable GetCitiesName(string srcLayer, string tagLayer, esriSpatialRelationEnum spatialRel)
{
//获取图层World Cities,通过IFeatureLayer接口来判断有没有获取成功
//如果获取失败，返回NULL
ILayer slayer = GetLayerByName(srcLayer);
ILayer tlayer = GetLayerByName(tagLayer);
IFeatureLayer sfeatureLayer = slayer as IFeatureLayer;
IFeatureLayer tfeatureLayer = tlayer as IFeatureLayer;
if (sfeatureLayer == null || tfeatureLayer == null)
{
return(null);
}
//利用IFeatureLayer接口的Search方法，得到要素指针接口对象，用于遍历图层中的全部要素
//利用featureCursor.NextFeature();来获取要素
//如果获取失败，返回NULL
//通过查询过滤从“Continents”图层获取“亚洲”这一几何图形
IGeometry geometry;
IFeature feature;
IFeatureClass sfeatureClass;
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = "CONTINENT='Asia'";
IFeatureCursor featureCursor = tfeatureLayer.FeatureClass.Search(queryFilter, false);
feature = featureCursor.NextFeature();
geometry = feature.Shape;
if (feature == null)
{
return(null);
}
//根据“亚洲”的几何图形来对城市图层进行属性和空间过滤
ISpatialFilter spatialFilter = new SpatialFilter();
sfeatureClass = sfeatureLayer.FeatureClass;
spatialFilter.Geometry = geometry;
spatialFilter.WhereClause = "POP_RANK=5";
spatialFilter.SpatialRel = (ESRI.ArcGIS.Geodatabase.esriSpatialRelEnum)spatialRel;
IFeatureSelection selectfeature = (IFeatureSelection)sfeatureLayer;
selectfeature.SelectFeatures(spatialFilter, esriSelectionResultEnum.esriSelectionResultNew, false);
//用选中的要素生成一个新图层
ISelectionSet selectionSet = selectfeature.SelectionSet;
IFeatureLayer newLayer = null;
if (selectionSet.Count > 0)
{
IFeatureLayerDefinition featureLayerDefinition = sfeatureLayer as IFeatureLayerDefinition;
newLayer = featureLayerDefinition.CreateSelectionLayer(sfeatureClass.AliasName, true, null, null);
}
if (newLayer == null)
{
return(null);
}
IFeature newFeature;
IFeatureCursor newFeatureCursor = newLayer.Search(null, false);
newFeature = newFeatureCursor.NextFeature();
if (newFeature == null)
{
return(null);
}
//新建属性表
DataTable dataTable = new DataTable();
//新建数据列，用于保存各大洲的序号和名称
//将数据列添加到数据表中
DataColumn dataColumn = new DataColumn();
dataColumn.ColumnName = "序号";
dataColumn.DataType = System.Type.GetType("System.Int32");
dataTable.Columns.Add(dataColumn);
dataColumn = new DataColumn();
dataColumn.ColumnName = "名称";
dataColumn.DataType = System.Type.GetType("System.String");
dataTable.Columns.Add(dataColumn);
dataColumn = new DataColumn();
dataColumn.ColumnName = "人口";
dataColumn.DataType = System.Type.GetType("System.String");
dataTable.Columns.Add(dataColumn);
//生成数据行DataRow
//当要素不为空时，将要素在名称和序号字段上的值赋给DataRow的对应列中
//在Continents图层中，序号信息在第0个字段，名称信息在第2个字段
DataRow dataRow;
while (newFeature != null)
{
dataRow = dataTable.NewRow();
dataRow[0] = newFeature.get_Value(0);
dataRow[1] = newFeature.get_Value(2);
dataRow[2] = newFeature.get_Value(9);
dataTable.Rows.Add(dataRow);
newFeature = newFeatureCursor.NextFeature();
}
//属性表设置完成，返回属性表
return(dataTable);
}
public bool QueryIntersect(string srcLayerName, string tgtLayerName, IMap imap, esriSpatialRelationEnum spatialRel)
{
DataOperator pDo = new DataOperator(imap, null);
//定义并根据图层名称获取图层对象
IFeatureLayer iSrcLayer = new FeatureLayerClass();
iSrcLayer = (IFeatureLayer)pDo.GetLayerbyName(srcLayerName);
IFeatureLayer iTgtLayer = (IFeatureLayer)pDo.GetLayerbyName(tgtLayerName);
//通过查询过滤获取continent层中亚洲几何
IGeometry pGt;
IFeature pF;
IFeatureCursor pFcs;
IFeatureClass pFcl;
IQueryFilter pQf = new QueryFilter();
pQf.WhereClause = "CONTINENT='Asia'";//设置查询条件
pFcs = iTgtLayer.FeatureClass.Search(pQf, false);
pF = pFcs.NextFeature();
pGt = pF.Shape;
try
{
pFcl = iSrcLayer.FeatureClass;
}
catch
{
}
ISpatialFilter pSf = new SpatialFilter();
pSf.Geometry = pGt;
pSf.WhereClause = "POP_RANK=5";//人口等级低于5的城市
pSf.SpatialRel = (ESRI.ArcGIS.Geodatabase.esriSpatialRelEnum)spatialRel;
//定义要素选择对象，以要素搜索图层进行实例化
IFeatureSelection pFs = (IFeatureSelection)iSrcLayer;
//以空间过滤器对要素进行选择，并建立新选择集
try
{
pFs.SelectFeatures(pSf, esriSelectionResultEnum.esriSelectionResultNew, false);
}
catch
{
}
return(true);
}
