public int QueryValues(IRowBuffer row)
{
try
{
if (m_currentOGRFeature == null)
{
return(-1);
}
// loop and only set values in the rowbuffer
// that were requested from the fieldMap
int count = m_esriQueryFieldMap.GetLength(0);
for (int i = 0; i < count; i++)
{
int esriFieldIndex = (int)m_esriQueryFieldMap.GetValue(i);
// have to skip 1) objectid and 2) geometry field or we will get an ESRI
// exception. Also have to skip anything that the query map is asking to ignore
if (esriFieldIndex == -1 ||
esriFieldIndex == m_pDataset.get_OIDFieldIndex(0) ||
esriFieldIndex == m_pDataset.get_ShapeFieldIndex(0))
{
continue;
}
try
{
IField valField = m_pDataset.get_Fields(0).get_Field(i);
object val = m_pDataset.get_mapped_value(m_currentOGRFeature, i);
row.set_Value(i, val);
}
catch (Exception ex)
{
// skip values that fail to be set but continue doing it anyway
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
return(m_currentOGRFeature.GetFID());
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return(-1);
}
}
/// <summary>
/// Spatial filter using OGR
/// </summary>
/// <param name="featureSet">FeatureSet</param>
/// <param name="geometry">Spatial geometry</param>
/// <returns>Indexs of selected features</returns>
public static List <int> OgrSpatialFilter(IFeatureSet featureSet, IGeometry geometry)
{
List <int> result = new List <int>();
OSGeo.OGR.Layer layer = GIS.GDAL.VectorConverter.DS2OrgLayer(featureSet);
OSGeo.OGR.Geometry geo = GIS.GDAL.VectorConverter.DS2OgrGeometry(geometry, featureSet);
layer.SetSpatialFilter(geo);
OSGeo.OGR.Feature feature = layer.GetNextFeature();
while (feature != null)
{
result.Add(Convert.ToInt32(feature.GetFID()));
feature = layer.GetNextFeature();
}
return(result);
}
public int QueryValues(IRowBuffer row)
{
try
{
if (m_currentOGRFeature == null)
{
return(-1);
}
// Loop and only set values in the rowbuffer
// that were requested by ArcGIS.
//
// Ignore the ArcObjects documentation because it says I should use the field map
// and that is straight out incorrect. Only copy values if the fieldmap has any value
// besides -1. Othewise, ignore whatever map it is asking to copy to and simply copy
// to the right field.
IFields pFields = m_pDataset.get_Fields(0);
int fieldCount = pFields.FieldCount;
for (int i = 0; i < fieldCount; i++)
{
int esriFieldIndex = (int)m_esriQueryFieldMap.GetValue(i);
if (esriFieldIndex == -1 ||
i == m_pDataset.get_OIDFieldIndex(0) ||
i == m_pDataset.get_ShapeFieldIndex(0))
{
continue;
}
IField pField = pFields.get_Field(i);
object val = null;
// DANGER - POTENTIAL BUG - Workaround. For some reason, in ArcGIS 10.1SP1 I am
// getting fields that should not be editable passed in to map into!!!?!? I am
// skipping those here. In theory, since we are the DataSource provider, we should be able to
// use a lower level set value that skips polymorphic behavior and hence allows
// the write to happen even in non-editable fields. Something analogous to
// ITableWrite::WriteRow, but for Rows. We don't have that, so I skip those values for those
// rows.
if (!pFields.get_Field(i).Editable)
{
continue;
}
try
{
val = m_pDataset.get_mapped_value(m_currentOGRFeature, i);
row.set_Value(i, val);
}
catch (Exception ex)
{
// skip values that fail to be set but continue doing it anyway
string msg = String.Format("OGRFID:[{0}] esriFieldName:[{1}] esriFieldIndex:[{2}] esriValue:[{3}] Exception:[{4}]",
m_currentOGRFeature.GetFID(),
pField.Name,
esriFieldIndex,
val != null ? val.ToString() : "<not set>",
ex.Message);
System.Diagnostics.Debug.WriteLine(msg);
}
}
return(m_currentOGRFeature.GetFID());
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
return(-1);
}
}
/// <summary>
/// Query by geometry
/// </summary>
/// <param name="geo">input geometry</param>
/// <param name="layer">target layer</param>
/// <returns></returns>
public List <int> QueryByGeometry(OSGeo.OGR.Geometry geo, OSGeo.OGR.Layer layer, SpatialRel sr)
{
List <int> result = new List <int>();
try
{
OSGeo.OGR.Feature oFeature = null;
while ((oFeature = layer.GetNextFeature()) != null)
{
OSGeo.OGR.Geometry oGeometry = oFeature.GetGeometryRef();
switch (sr)
{
case SpatialQuery.SpatialRel.Undefined: break;
case SpatialQuery.SpatialRel.Intersects:
if (geo.Intersect(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Contains:
if (oGeometry.Contains(geo))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Crosses:
if (geo.Crosses(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Overlaps:
if (geo.Overlaps(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.Touches:
if (geo.Touches(oGeometry))
{
result.Add((int)oFeature.GetFID());
}
break;
case SpatialQuery.SpatialRel.WithIn:
if (oGeometry.Within(geo))
{
result.Add((int)oFeature.GetFID());
}
break;
}
}
}
catch
{
throw;
}
return(result);
}
