private void btnSelectDistrict1_Click(object sender, EventArgs e)
{
MgMapBase map = _viewer.GetMap();
MgLayerCollection layers = map.GetLayers();
MgLayerBase districts = layers.GetItem("Districts");
MgLayerBase parcels = layers.GetItem("Parcels");
//Query the geometry of district 1
MgFeatureQueryOptions districtQuery = new MgFeatureQueryOptions();
districtQuery.SetFilter("Autogenerated_SDF_ID = 1");
MgFeatureReader reader = districts.SelectFeatures(districtQuery);
MgGeometry districtGeom = null;
MgAgfReaderWriter agfRw = new MgAgfReaderWriter();
try
{
reader.ReadNext();
MgByteReader geomAgf = reader.GetGeometry(districts.GetFeatureGeometryName());
districtGeom = agfRw.Read(geomAgf);
}
finally
{
reader.Close();
}
//Now use this geometry as the basis of our 2nd query
MgFeatureQueryOptions parcelQuery = new MgFeatureQueryOptions();
parcelQuery.SetFilter("RNAME LIKE 'SCHMITT%'");
parcelQuery.SetSpatialFilter(parcels.GetFeatureGeometryName(), districtGeom, MgFeatureSpatialOperations.Inside);
//Select the features
reader = parcels.SelectFeatures(parcelQuery);
MgSelectionBase selection = _viewer.GetSelection();
try
{
selection.FromXml(""); //Clear existing selection data
selection.AddFeatures(parcels, reader, 0);
}
finally
{
reader.Close();
}
//Because we manipulated the active selection outside the viewer
//We need to call UpdateSelection() to instruct the viewer to
//re-render the active selection. The "true" parameter instructs
//the viewer to raise the SelectionChanged event as well, so that
//subscribers like the Property Pane get updated as well.
_viewer.UpdateSelection(true);
_viewer.RefreshMap();
}
private void btnQueryDistrict1_Click(object sender, EventArgs e)
{
MgMapBase map = _viewer.GetMap();
MgLayerCollection layers = map.GetLayers();
MgLayerBase districts = layers.GetItem("Districts");
MgLayerBase parcels = layers.GetItem("Parcels");
//Query the geometry of district 1
MgFeatureQueryOptions districtQuery = new MgFeatureQueryOptions();
districtQuery.SetFilter("Autogenerated_SDF_ID = 1");
MgFeatureReader reader = districts.SelectFeatures(districtQuery);
MgGeometry districtGeom = null;
MgAgfReaderWriter agfRw = new MgAgfReaderWriter();
try
{
reader.ReadNext();
MgByteReader geomAgf = reader.GetGeometry(districts.GetFeatureGeometryName());
districtGeom = agfRw.Read(geomAgf);
}
finally
{
reader.Close();
}
//Now use this geometry as the basis of our 2nd query
MgFeatureQueryOptions parcelQuery = new MgFeatureQueryOptions();
parcelQuery.SetFilter("RNAME LIKE 'SCHMITT%'");
parcelQuery.SetSpatialFilter(parcels.GetFeatureGeometryName(), districtGeom, MgFeatureSpatialOperations.Inside);
//Select the features
reader = parcels.SelectFeatures(parcelQuery);
List <string> results = new List <string>();
try
{
while (reader.ReadNext())
{
if (!reader.IsNull("RPROPAD"))
{
results.Add(reader.GetString("RPROPAD"));
}
}
}
finally
{
reader.Close();
}
new ParcelQueryResultWindow(results).ShowDialog();
}
// GET: Search/Results
public ActionResult Results(SearchInputModel input)
{
MgSiteConnection conn = CreateConnection(input);
MgMap map = new MgMap(conn);
map.Open(input.MapName);
MgLayerCollection layers = map.GetLayers();
int lidx = layers.IndexOf("Parcels");
if (lidx < 0)
{
throw new Exception("Layer not found on map: Parcels");
}
MgLayerBase layer = layers[lidx];
MgFeatureQueryOptions query = new MgFeatureQueryOptions();
//Don't fret about the input here. This is not a SQL injection attack vector. This filter string is
//not SQL, it's a FDO filter. A 'DROP TABLE' or any other destructive SQL will fail on
//query execution when this filter is parsed to a FDO filter.
switch (input.By)
{
case "OWNER":
query.SetFilter("RNAME LIKE '%" + input.Query.Replace("'", "\'") + "%'");
break;
case "ADDRESS":
query.SetFilter("RPROPAD LIKE '%" + input.Query.Replace("'", "\'") + "%'");
break;
case "BBOX":
double[] parts = input.Query.Split(',').Select(s => double.Parse(s, CultureInfo.InvariantCulture)).ToArray();
if (parts.Length != 4)
{
throw new Exception("Invalid BBOX parameter");
}
MgWktReaderWriter wktRw = new MgWktReaderWriter();
MgGeometry filterGeom = wktRw.Read(MakeWktPolygon(parts[0], parts[1], parts[2], parts[3]));
query.SetSpatialFilter(layer.FeatureGeometryName, filterGeom, MgFeatureSpatialOperations.Intersects);
break;
default:
throw new Exception("Unknown query type: " + input.By);
}
SearchResultViewModel vm = new SearchResultViewModel();
vm.Session = input.Session;
vm.MapName = input.MapName;
vm.LoadResults(layer, query);
return(View(vm));
}
private void btnQueryDistrict1_Click(object sender, EventArgs e)
{
MgMapBase map = _viewer.GetMap();
MgLayerCollection layers = map.GetLayers();
MgLayerBase districts = layers.GetItem("Districts");
MgLayerBase parcels = layers.GetItem("Parcels");
//Query the geometry of district 1
MgFeatureQueryOptions districtQuery = new MgFeatureQueryOptions();
districtQuery.SetFilter("Autogenerated_SDF_ID = 1");
MgFeatureReader reader = districts.SelectFeatures(districtQuery);
MgGeometry districtGeom = null;
MgAgfReaderWriter agfRw = new MgAgfReaderWriter();
try
{
reader.ReadNext();
MgByteReader geomAgf = reader.GetGeometry(districts.GetFeatureGeometryName());
districtGeom = agfRw.Read(geomAgf);
}
finally
{
reader.Close();
}
//Now use this geometry as the basis of our 2nd query
MgFeatureQueryOptions parcelQuery = new MgFeatureQueryOptions();
parcelQuery.SetFilter("RNAME LIKE 'SCHMITT%'");
parcelQuery.SetSpatialFilter(parcels.GetFeatureGeometryName(), districtGeom, MgFeatureSpatialOperations.Inside);
//Select the features
reader = parcels.SelectFeatures(parcelQuery);
List<string> results = new List<string>();
try
{
while (reader.ReadNext())
{
if (!reader.IsNull("RPROPAD"))
results.Add(reader.GetString("RPROPAD"));
}
}
finally
{
reader.Close();
}
new ParcelQueryResultWindow(results).ShowDialog();
}
// GET: Search/Results
public ActionResult Results(SearchInputModel input)
{
MgSiteConnection conn = CreateConnection(input);
MgMap map = new MgMap(conn);
map.Open(input.MapName);
MgLayerCollection layers = map.GetLayers();
int lidx = layers.IndexOf("Parcels");
if (lidx < 0)
{
throw new Exception("Layer not found on map: Parcels");
}
MgLayerBase layer = layers.GetItem(lidx);
MgFeatureQueryOptions query = new MgFeatureQueryOptions();
//Don't fret about the input here. This is not a SQL injection attack vector. This filter string is
//not SQL, it's a FDO filter. A 'DROP TABLE' or any other destructive SQL will fail on
//query execution when this filter is parsed to a FDO filter.
switch (input.By)
{
case "OWNER":
query.SetFilter("RNAME LIKE '%" + input.Query.Replace("'", "\'") + "%'");
break;
case "ADDRESS":
query.SetFilter("RPROPAD LIKE '%" + input.Query.Replace("'", "\'") + "%'");
break;
case "BBOX":
double[] parts = input.Query.Split(',').Select(s => double.Parse(s, CultureInfo.InvariantCulture)).ToArray();
if (parts.Length != 4)
{
throw new Exception("Invalid BBOX parameter");
}
MgWktReaderWriter wktRw = new MgWktReaderWriter();
MgGeometry filterGeom = wktRw.Read(MakeWktPolygon(parts[0], parts[1], parts[2], parts[3]));
query.SetSpatialFilter(layer.FeatureGeometryName, filterGeom, MgFeatureSpatialOperations.Intersects);
break;
default:
throw new Exception("Unknown query type: " + input.By);
}
SearchResultViewModel vm = new SearchResultViewModel();
vm.Session = input.Session;
vm.MapName = input.MapName;
vm.LoadResults(layer, query);
return View(vm);
}
//----------------------------------------------------------------------------------------
// �� �ܣ� ��ѯָ����Χ�ڵ�Ҫ��
//
// �� �ߣ�
//
//
// �� �ڣ�2007.05.#
//
//-----------------------------------------------------------------------------------------
public ParcelProperty[] GetNearParcels(string parcelType, GeocodeAddress geocodeAddress, double bufferDistance)
{
ParcelProperty[] parcelProperties = null;
//���ڵ�ַ���� ���ε�͵�Ļ������������Σ�
MgGeometryFactory geoFactory = new MgGeometryFactory();
MgCoordinate coord = geoFactory.CreateCoordinateXY(Convert.ToDouble(geocodeAddress.lon), Convert.ToDouble(geocodeAddress.lat));
MgPoint pt = geoFactory.CreatePoint(coord);
//��ѯ��ָ����Χ�ڣ�����Σ���Ҫ��
MgPolygon buffer = (MgPolygon)pt.Buffer(bufferDistance, null);
MgFeatureService featureService = (MgFeatureService)siteConnection.CreateService(MgServiceType.FeatureService);
MgFeatureQueryOptions query = new MgFeatureQueryOptions();
query.SetFilter("RTYPE LIKE '" + parcelType + "%'");
query.SetSpatialFilter("SHPGEOM", buffer, MgFeatureSpatialOperations.Inside);
MgResourceIdentifier resId = new MgResourceIdentifier("Library://Samples/Sheboygan/Data/Parcels.FeatureSource");
MgFeatureReader featReader = featureService.SelectFeatures(resId, "Parcels", query);
//�����ѯ���
ArrayList props = new ArrayList();
while (featReader.ReadNext())
{
ParcelProperty prop = new ParcelProperty();
prop.ID = featReader.GetInt32("Autogenerated_SDF_ID").ToString();
prop.Acreage = featReader.GetString("RACRE");
prop.BillingAddr = featReader.GetString("RBILAD");
prop.Description1 = featReader.GetString("RLDESCR1");
prop.Description2 = featReader.GetString("RLDESCR2");
prop.Description3 = featReader.GetString("RLDESCR3");
prop.Description4 = featReader.GetString("RLDESCR4");
prop.LotDimension = featReader.GetString("RLOT");
prop.LotSize = featReader.GetInt32("RSQFT");
prop.Owner = featReader.GetString("RNAME");
prop.Zoning = featReader.GetString("RTYPE");
props.Add(prop);
}
parcelProperties = (ParcelProperty[])props.ToArray(typeof(ParcelProperty));
return parcelProperties;
}
private void btnExecute_Click(object sender, EventArgs e)
{
var query = new MgFeatureQueryOptions();
var provider = _viewer.GetProvider();
var layer = (MgLayerBase)cmbLayer.SelectedItem;
var prop = (MgDataPropertyDefinition)cmbProperty.SelectedItem;
var op = (QueryOperator)cmbOperator.SelectedItem;
if (chkPropFilterEnabled.Checked)
{
query.SetFilter(FilterToString(prop, op, txtValue.Text));
}
if (chkSpatialFilter.Checked)
{
query.SetSpatialFilter(layer.GetFeatureGeometryName(), _filterGeometry, MgFeatureSpatialOperations.Intersects);
}
var reader = layer.SelectFeatures(query);
new MgQueryResultsDialog(_viewer, layer, reader, Convert.ToInt32(numResults.Value)).Show();
}
private void btnFindFeaturesInBuffer_Click(object sender, EventArgs e)
{
MgSelectionBase selection = _viewer.GetSelection();
MgReadOnlyLayerCollection selectedLayers = selection.GetLayers();
if (selectedLayers == null)
{
MessageBox.Show("Select a parcel");
return;
}
MgLayerBase parcels = null;
for (int i = 0; i < selectedLayers.GetCount(); i++)
{
MgLayerBase layer = selectedLayers.GetItem(i);
if (layer.Name == "Parcels")
{
parcels = layer;
break;
}
}
if (parcels == null)
{
MessageBox.Show("Select a parcel");
return;
}
int bufferRingSize = 500; // measured in metres
// Set up some objects for coordinate conversion
MgMapBase map = _viewer.GetMap();
MgLayerCollection mapLayers = map.GetLayers();
MgMapViewerProvider provider = _viewer.GetProvider();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
//Casting to MgdFeatureService because we want to use convenience APIs
MgFeatureService featureService = (MgdFeatureService)provider.CreateService(MgServiceType.FeatureService);
string sessionId = Guid.NewGuid().ToString();
String mapWktSrs = map.GetMapSRS();
MgAgfReaderWriter agfReaderWriter = new MgAgfReaderWriter();
MgWktReaderWriter wktReaderWriter = new MgWktReaderWriter();
MgCoordinateSystemFactory coordinateSystemFactory = new MgCoordinateSystemFactory();
MgCoordinateSystem srs = coordinateSystemFactory.Create(mapWktSrs);
MgMeasure srsMeasure = srs.GetMeasure();
// Check for a buffer layer. If it exists, delete
// the current features.
// If it does not exist, create a feature source and
// a layer to hold the buffer.
BufferHelper helper = new BufferHelper();
MgdLayer bufferLayer = null;
int layerIndex = map.GetLayers().IndexOf("Buffer");
if (layerIndex < 0)
{
// The layer does not exist and must be created.
MgResourceIdentifier bufferFeatureResId = new MgResourceIdentifier("Session:" + sessionId + "//Buffer.FeatureSource");
helper.CreateBufferFeatureSource(featureService, mapWktSrs, bufferFeatureResId);
bufferLayer = helper.CreateBufferLayer(resourceService, bufferFeatureResId, sessionId);
map.GetLayers().Insert(0, bufferLayer);
}
else
{
bufferLayer = (MgdLayer)map.GetLayers().GetItem(layerIndex);
bufferLayer.DeleteFeatures("ID like '%'");
}
// Check for a parcel marker layer. If it exists, delete
// the current features.
// If it does not exist, create a feature source and
// a layer to hold the parcel markers.
MgdLayer parcelMarkerLayer = null;
layerIndex = map.GetLayers().IndexOf("ParcelMarker");
if (layerIndex < 0)
{
MgResourceIdentifier parcelFeatureResId = new MgResourceIdentifier("Session:" + sessionId + "//ParcelMarker.FeatureSource");
helper.CreateParcelMarkerFeatureSource(featureService, mapWktSrs, parcelFeatureResId);
parcelMarkerLayer = helper.CreateParcelMarkerLayer(resourceService, parcelFeatureResId, sessionId);
map.GetLayers().Insert(0, parcelMarkerLayer);
}
else
{
parcelMarkerLayer = (MgdLayer)map.GetLayers().GetItem(layerIndex);
parcelMarkerLayer.DeleteFeatures("ID like '%'");
}
// Check each layer in the selection.
for (int i = 0; i < selectedLayers.GetCount(); i++)
{
// Only check selected features in the Parcels layer.
MgdLayer layer = (MgdLayer)selectedLayers.GetItem(i);
if (layer.GetName() == "Parcels")
{
string geomName = layer.GetFeatureGeometryName();
System.Diagnostics.Trace.TraceInformation("Marking all parcels inside the buffer that are of type 'MFG'");
MgFeatureReader featureReader = selection.GetSelectedFeatures(layer, layer.GetFeatureClassName(), false);
// Process each item in the MgFeatureReader. Get the
// geometries from all the selected features and
// merge them into a single geometry.
MgGeometryCollection inputGeometries = new MgGeometryCollection();
while (featureReader.ReadNext())
{
MgByteReader featureGeometryData = featureReader.GetGeometry(geomName);
MgGeometry featureGeometry = agfReaderWriter.Read(featureGeometryData);
inputGeometries.Add(featureGeometry);
}
MgGeometryFactory geometryFactory = new MgGeometryFactory();
MgGeometry mergedGeometries = geometryFactory.CreateMultiGeometry(inputGeometries);
// Create a buffer from the merged geometries
double bufferDist = srs.ConvertMetersToCoordinateSystemUnits(bufferRingSize);
MgGeometry bufferGeometry = mergedGeometries.Buffer(bufferDist, srsMeasure);
// Create a filter to select parcels within the buffer. Combine
// a basic filter and a spatial filter to select all parcels
// within the buffer that are of type "MFG".
MgFeatureQueryOptions queryOptions = new MgFeatureQueryOptions();
queryOptions.SetFilter("RTYPE = 'MFG'");
queryOptions.SetSpatialFilter(geomName, bufferGeometry, MgFeatureSpatialOperations.Inside);
featureReader = layer.SelectFeatures(queryOptions);
// Get the features from the feature source,
// determine the centroid of each selected feature, and
// add a point to the ParcelMarker layer to mark the
// centroid.
// Collect all the points into an MgFeatureCommandCollection,
// so they can all be added in one operation.
MgFeatureCommandCollection parcelMarkerCommands = new MgFeatureCommandCollection();
int inserted = 0;
while (featureReader.ReadNext())
{
MgByteReader byteReader = featureReader.GetGeometry(geomName);
MgGeometry geometry = agfReaderWriter.Read(byteReader);
MgPoint point = geometry.GetCentroid();
// Create an insert command for this parcel.
MgPropertyCollection properties = new MgPropertyCollection();
properties.Add(new MgGeometryProperty("ParcelLocation", agfReaderWriter.Write(point)));
//parcelMarkerCommands.Add(new MgInsertFeatures("ParcelMarkerClass", properties));
MgFeatureReader fr = parcelMarkerLayer.InsertFeatures(properties);
fr.Close();
inserted++;
}
featureReader.Close();
if (inserted == 0)
{
MessageBox.Show("No parcels within the buffer area match.");
return;
}
// Create a feature in the buffer feature source to show the area covered by the buffer.
MgPropertyCollection props = new MgPropertyCollection();
props.Add(new MgGeometryProperty("BufferGeometry", agfReaderWriter.Write(bufferGeometry)));
bufferLayer.InsertFeatures(props);
// Ensure that the buffer layer is visible and in the legend.
bufferLayer.SetVisible(true);
bufferLayer.ForceRefresh();
bufferLayer.SetDisplayInLegend(true);
parcelMarkerLayer.SetVisible(true);
parcelMarkerLayer.ForceRefresh();
MessageBox.Show("Done");
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
legend.RefreshLegend();
}
}
}
private void btnSelectDistrict1_Click(object sender, EventArgs e)
{
MgMapBase map = _viewer.GetMap();
MgLayerCollection layers = map.GetLayers();
MgLayerBase districts = layers.GetItem("Districts");
MgLayerBase parcels = layers.GetItem("Parcels");
//Query the geometry of district 1
MgFeatureQueryOptions districtQuery = new MgFeatureQueryOptions();
districtQuery.SetFilter("Autogenerated_SDF_ID = 1");
MgFeatureReader reader = districts.SelectFeatures(districtQuery);
MgGeometry districtGeom = null;
MgAgfReaderWriter agfRw = new MgAgfReaderWriter();
try
{
reader.ReadNext();
MgByteReader geomAgf = reader.GetGeometry(districts.GetFeatureGeometryName());
districtGeom = agfRw.Read(geomAgf);
}
finally
{
reader.Close();
}
//Now use this geometry as the basis of our 2nd query
MgFeatureQueryOptions parcelQuery = new MgFeatureQueryOptions();
parcelQuery.SetFilter("RNAME LIKE 'SCHMITT%'");
parcelQuery.SetSpatialFilter(parcels.GetFeatureGeometryName(), districtGeom, MgFeatureSpatialOperations.Inside);
//Select the features
reader = parcels.SelectFeatures(parcelQuery);
MgSelectionBase selection = _viewer.GetSelection();
try
{
selection.FromXml(""); //Clear existing selection data
selection.AddFeatures(parcels, reader, 0);
}
finally
{
reader.Close();
}
//Because we manipulated the active selection outside the viewer
//We need to call UpdateSelection() to instruct the viewer to
//re-render the active selection. The "true" parameter instructs
//the viewer to raise the SelectionChanged event as well, so that
//subscribers like the Property Pane get updated as well.
_viewer.UpdateSelection(true);
_viewer.RefreshMap();
}
private void btnFindFeaturesInBuffer_Click(object sender, EventArgs e)
{
MgSelectionBase selection = _viewer.GetSelection();
MgReadOnlyLayerCollection selectedLayers = selection.GetLayers();
if (selectedLayers == null)
{
MessageBox.Show("Select a parcel");
return;
}
MgLayerBase parcels = null;
for (int i = 0; i < selectedLayers.GetCount(); i++)
{
MgLayerBase layer = selectedLayers.GetItem(i);
if (layer.Name == "Parcels")
{
parcels = layer;
break;
}
}
if (parcels == null)
{
MessageBox.Show("Select a parcel");
return;
}
int bufferRingSize = 500; // measured in metres
// Set up some objects for coordinate conversion
MgMapBase map = _viewer.GetMap();
MgLayerCollection mapLayers = map.GetLayers();
MgMapViewerProvider provider = _viewer.GetProvider();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
//Casting to MgdFeatureService because we want to use convenience APIs
MgFeatureService featureService = (MgdFeatureService)provider.CreateService(MgServiceType.FeatureService);
string sessionId = Guid.NewGuid().ToString();
String mapWktSrs = map.GetMapSRS();
MgAgfReaderWriter agfReaderWriter = new MgAgfReaderWriter();
MgWktReaderWriter wktReaderWriter = new MgWktReaderWriter();
MgCoordinateSystemFactory coordinateSystemFactory = new MgCoordinateSystemFactory();
MgCoordinateSystem srs = coordinateSystemFactory.Create(mapWktSrs);
MgMeasure srsMeasure = srs.GetMeasure();
// Check for a buffer layer. If it exists, delete
// the current features.
// If it does not exist, create a feature source and
// a layer to hold the buffer.
BufferHelper helper = new BufferHelper();
MgdLayer bufferLayer = null;
int layerIndex = map.GetLayers().IndexOf("Buffer");
if (layerIndex < 0)
{
// The layer does not exist and must be created.
MgResourceIdentifier bufferFeatureResId = new MgResourceIdentifier("Session:" + sessionId + "//Buffer.FeatureSource");
helper.CreateBufferFeatureSource(featureService, mapWktSrs, bufferFeatureResId);
bufferLayer = helper.CreateBufferLayer(resourceService, bufferFeatureResId, sessionId);
map.GetLayers().Insert(0, bufferLayer);
}
else
{
bufferLayer = (MgdLayer)map.GetLayers().GetItem(layerIndex);
bufferLayer.DeleteFeatures("ID like '%'");
}
// Check for a parcel marker layer. If it exists, delete
// the current features.
// If it does not exist, create a feature source and
// a layer to hold the parcel markers.
MgdLayer parcelMarkerLayer = null;
layerIndex = map.GetLayers().IndexOf("ParcelMarker");
if (layerIndex < 0)
{
MgResourceIdentifier parcelFeatureResId = new MgResourceIdentifier("Session:" + sessionId + "//ParcelMarker.FeatureSource");
helper.CreateParcelMarkerFeatureSource(featureService, mapWktSrs, parcelFeatureResId);
parcelMarkerLayer = helper.CreateParcelMarkerLayer(resourceService, parcelFeatureResId, sessionId);
map.GetLayers().Insert(0, parcelMarkerLayer);
}
else
{
parcelMarkerLayer = (MgdLayer)map.GetLayers().GetItem(layerIndex);
parcelMarkerLayer.DeleteFeatures("ID like '%'");
}
// Check each layer in the selection.
for (int i = 0; i < selectedLayers.GetCount(); i++)
{
// Only check selected features in the Parcels layer.
MgdLayer layer = (MgdLayer)selectedLayers.GetItem(i);
if (layer.GetName() == "Parcels")
{
string geomName = layer.GetFeatureGeometryName();
System.Diagnostics.Trace.TraceInformation("Marking all parcels inside the buffer that are of type 'MFG'");
MgFeatureReader featureReader = selection.GetSelectedFeatures(layer, layer.GetFeatureClassName(), false);
// Process each item in the MgFeatureReader. Get the
// geometries from all the selected features and
// merge them into a single geometry.
MgGeometryCollection inputGeometries = new MgGeometryCollection();
while (featureReader.ReadNext())
{
MgByteReader featureGeometryData = featureReader.GetGeometry(geomName);
MgGeometry featureGeometry = agfReaderWriter.Read(featureGeometryData);
inputGeometries.Add(featureGeometry);
}
MgGeometryFactory geometryFactory = new MgGeometryFactory();
MgGeometry mergedGeometries = geometryFactory.CreateMultiGeometry(inputGeometries);
// Create a buffer from the merged geometries
double bufferDist = srs.ConvertMetersToCoordinateSystemUnits(bufferRingSize);
MgGeometry bufferGeometry = mergedGeometries.Buffer(bufferDist, srsMeasure);
// Create a filter to select parcels within the buffer. Combine
// a basic filter and a spatial filter to select all parcels
// within the buffer that are of type "MFG".
MgFeatureQueryOptions queryOptions = new MgFeatureQueryOptions();
queryOptions.SetFilter("RTYPE = 'MFG'");
queryOptions.SetSpatialFilter(geomName, bufferGeometry, MgFeatureSpatialOperations.Inside);
featureReader = layer.SelectFeatures(queryOptions);
// Get the features from the feature source,
// determine the centroid of each selected feature, and
// add a point to the ParcelMarker layer to mark the
// centroid.
// Collect all the points into an MgFeatureCommandCollection,
// so they can all be added in one operation.
MgFeatureCommandCollection parcelMarkerCommands = new MgFeatureCommandCollection();
int inserted = 0;
while (featureReader.ReadNext())
{
MgByteReader byteReader = featureReader.GetGeometry(geomName);
MgGeometry geometry = agfReaderWriter.Read(byteReader);
MgPoint point = geometry.GetCentroid();
// Create an insert command for this parcel.
MgPropertyCollection properties = new MgPropertyCollection();
properties.Add(new MgGeometryProperty("ParcelLocation", agfReaderWriter.Write(point)));
//parcelMarkerCommands.Add(new MgInsertFeatures("ParcelMarkerClass", properties));
MgFeatureReader fr = parcelMarkerLayer.InsertFeatures(properties);
fr.Close();
inserted++;
}
featureReader.Close();
if (inserted == 0)
{
MessageBox.Show("No parcels within the buffer area match.");
return;
}
// Create a feature in the buffer feature source to show the area covered by the buffer.
MgPropertyCollection props = new MgPropertyCollection();
props.Add(new MgGeometryProperty("BufferGeometry", agfReaderWriter.Write(bufferGeometry)));
bufferLayer.InsertFeatures(props);
// Ensure that the buffer layer is visible and in the legend.
bufferLayer.SetVisible(true);
bufferLayer.ForceRefresh();
bufferLayer.SetDisplayInLegend(true);
parcelMarkerLayer.SetVisible(true);
parcelMarkerLayer.ForceRefresh();
MessageBox.Show("Done");
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
{
legend.RefreshLegend();
}
}
}
}
private void btnExecute_Click(object sender, EventArgs e)
{
var query = new MgFeatureQueryOptions();
var provider = _viewer.GetProvider();
var layer = (MgLayerBase)cmbLayer.SelectedItem;
var prop = (MgDataPropertyDefinition)cmbProperty.SelectedItem;
var op = (QueryOperator)cmbOperator.SelectedItem;
if (chkPropFilterEnabled.Checked)
query.SetFilter(FilterToString(prop, op, txtValue.Text));
if (chkSpatialFilter.Checked)
query.SetSpatialFilter(layer.GetFeatureGeometryName(), _filterGeometry, MgFeatureSpatialOperations.Intersects);
var reader = layer.SelectFeatures(query);
new MgQueryResultsDialog(_viewer, layer, reader, Convert.ToInt32(numResults.Value)).Show();
}
//---------------------------------------------------------------------------------------
//
// ���ܣ���ѯҪ��
//
// ���ߣ�
//
// ���ڣ� 2007.5.23
//
// ����ʷ����
//
//---------------------------------------------------------------------------------------
public ArrayList MakeQuery(int districtNum, String name)
{
ArrayList list = null;
//��ȡ��Դ�����Ҫ�ط���
MgResourceService resService = (MgResourceService)siteConnection.CreateService(MgServiceType.ResourceService);
MgFeatureService featureService = (MgFeatureService)siteConnection.CreateService(MgServiceType.FeatureService);
MgMap map = new MgMap();
map.Open(resService, "Sheboygan");
// ָ����ѯ�Ĺ�������
MgFeatureQueryOptions districtQuery = new MgFeatureQueryOptions();
districtQuery.SetFilter("Autogenerated_SDF_ID = " + districtNum);
////ָ����ѯ��Ҫ��Դ����Դ��ʶ����ͶƱѡ��VotingDistricts��
MgResourceIdentifier districtId = new MgResourceIdentifier("Library://MgTutorial/Data/VotingDistricts.FeatureSource");
MgFeatureReader featureReader = featureService.SelectFeatures(districtId, "VotingDistricts", districtQuery);
// �����ѯ�����ͶƱѡ��VotingDistricts��
featureReader.ReadNext();
MgByteReader geometryBytes = featureReader.GetGeometry("Data");
MgAgfReaderWriter agfReader = new MgAgfReaderWriter();
MgGeometry districtGeometry = agfReader.Read(geometryBytes);
// ָ����ѯ�Ĺ�����������ָ��ͶƱѡ��VotingDistricts��Χ�ڲ�ѯ
MgFeatureQueryOptions nameQuery = new MgFeatureQueryOptions();
nameQuery.SetFilter("RNAME LIKE '" + name + "%'");
nameQuery.SetSpatialFilter("SHPGEOM", districtGeometry, MgFeatureSpatialOperations.Inside);
////ָ����ѯ��Ҫ��Դ����Դ��ʶ�����ؿ�Parcels��
MgResourceIdentifier parcelId =new MgResourceIdentifier("Library://MgTutorial/Data/Parcels.FeatureSource");
featureReader = featureService.SelectFeatures(parcelId, "Parcels", nameQuery);
// �����ѯ���
list = new ArrayList();
while (featureReader.ReadNext())
{
// ��ȡRPROPAD���Զζ�Ӧ�����ݣ�String���ͣ�
list.Add(featureReader.GetString("RPROPAD"));
}
String schema = featureService.DescribeSchemaAsXml(parcelId, "");
return list;
}
