private Feature[] QueryByGeometry(Shape shape, enumSpatialRelation enumSpatialRelation)
{
if (_reader == null)
{
BeginRead();
}
if (_reader == null)
{
return(null);
}
using (IDbConnection conn = DbConnectionFactory.CreateDbConnection(_dbConnectionString))
{
if (conn == null)//数据库连接已经关闭或链接池没有可用连接
{
return(null);
}
conn.Open();
//
Feature[] fets = _reader.Read(shape.Envelope, null, conn);
if (fets != null)
{
foreach (Feature f in fets)
{
f.SetFeatureClass(_featureClass);
}
}
return(fets);
}
}
void Reset()
{
_geometry = null;
_whereclause = null;
_relation = enumSpatialRelation.Intersect;
}
public QueryFilter(Shape geometry, enumSpatialRelation rel, string whereClause)
{
_geometry = geometry;
_relation = rel;
_whereclause = whereClause;
}
public QueryFilter(Shape geomtry, enumSpatialRelation rel)
: this(geomtry)
{
_relation = rel;
}
private Feature[] QueryByComplex(Shape shape, enumSpatialRelation rel, string whereClause)
{
throw new NotImplementedException();
}
private Feature[] QueryByGeometry(Shape shape, enumSpatialRelation rel)
{
if (shape == null)
{
return(null);
}
if (!_isReady)
{
BeginRead();
}
if (_reader == null)
{
return(null);
}
Feature[] allfeatures = _reader.Features;
if (allfeatures == null || allfeatures.Length == 0)
{
return(null);
}
List <Feature> retfets = new List <Feature>();
foreach (Feature fet in allfeatures)
{
if (fet.Geometry == null)
{
continue;
}
fet.SetFeatureClass(_featureClass);
switch (rel)
{
case enumSpatialRelation.Intersect:
if (fet.Geometry.Envelope.IsInteractived(shape.Envelope))
{
retfets.Add(fet);
}
break;
case enumSpatialRelation.Contains:
if (shape.Envelope.Contains(fet.Geometry.Envelope))
{
retfets.Add(fet);
}
break;
case enumSpatialRelation.Within:
if (fet.Geometry.Envelope.Contains(shape.Envelope))
{
retfets.Add(fet);
}
break;
case enumSpatialRelation.Disjoint:
if (!fet.Geometry.Envelope.IsInteractived(shape.Envelope))
{
retfets.Add(fet);
}
break;
default:
throw new NotSupportedException("数据源\"" + GetType().ToString() + "\"不支持类型为\"" + rel.ToString() + "\"的空间查询。");
}
}
return(retfets.Count > 0 ? retfets.ToArray() : null);
}
