private byte[] ExportGeoJsonHandler(NameValueCollection boundVariables,
JsonObject operationInput,
string outputFormat,
string requestProperties,
out string responseProperties)
{
responseProperties = null;
bool applyQuery = true;
string retval = "";
string whereClause;
bool found = operationInput.TryGetString("query", out whereClause);
if (!found || string.IsNullOrEmpty(whereClause))
{
//then no definition query
applyQuery = false;
}
long?layerOrdinal;
found = operationInput.TryGetAsLong("layer", out layerOrdinal); //.TryGetString("layer", out parm2Value);
if (!found)
{
throw new ArgumentNullException("layer");
}
string s = "";
ESRI.ArcGIS.Carto.IMapServer mapServer = (ESRI.ArcGIS.Carto.IMapServer)serverObjectHelper.ServerObject;
ESRI.ArcGIS.Carto.IMapServerDataAccess mapServerObjects = (ESRI.ArcGIS.Carto.IMapServerDataAccess)mapServer;
var lyr = mapServerObjects.GetDataSource(mapServer.DefaultMapName, Convert.ToInt32(layerOrdinal));
if (lyr is IFeatureClass)
{
IFeatureClass fclass = (IFeatureClass)lyr;
retval = "{\"shape\": \"" + fclass.ShapeFieldName + "\"}";
IQueryFilter filter = new QueryFilterClass();
filter.set_OutputSpatialReference(fclass.ShapeFieldName, getWGS84());
if (applyQuery)
{
filter.WhereClause = whereClause;
}
IFeatureCursor curs = fclass.Search(filter, false);
//apply extension methods here
try
{
s = curs.ToGeoJson();
Marshal.ReleaseComObject(curs);
}
catch (Exception ex)
{
s = ex.GetBaseException().ToString(); //.StackTrace;
}
retval = s;
}
else
{
throw new Exception("Layer " + layerOrdinal.ToString() + " is not a feature layer.");
}
return(Encoding.UTF8.GetBytes(retval));
}
private byte[] ExportGeoJsonHandler(NameValueCollection boundVariables,
JsonObject operationInput,
string outputFormat,
string requestProperties,
out string responseProperties)
{
responseProperties = "{\"Content-Type\" : \"application/json\"}";;
bool applyQuery = true;
bool useBbox = true;
bool useBboxSR = true;
string retval = "";
string whereClause;
string boxClause;
int bboxSRID = 0;
IPolygon queryGeom = null;
Helpers helper = new Helpers();
bool found = operationInput.TryGetString("query", out whereClause);
if (!found || string.IsNullOrEmpty(whereClause))
{
//then no definition query
applyQuery = false;
}
string ssrid;
found = operationInput.TryGetString("bboxSR", out ssrid);
if (!found || string.IsNullOrEmpty(ssrid))
{
//then no definition query
useBboxSR = false;
}
else
{
int srid;
bool valid = int.TryParse(ssrid, out srid);
if (valid)
{
bboxSRID = srid;
}
else
{
useBboxSR = false;
}
}
found = operationInput.TryGetString("bbox", out boxClause);
if (!found || string.IsNullOrEmpty(boxClause))
{
//then no definition query
useBbox = false;
}
if (useBbox)
{
try
{
double xmin; double ymin; double xmax; double ymax;
string[] vals = boxClause.Split(new char[] { ',' });
if (vals.Length == 4)
{
bool bxmin = double.TryParse(vals[0], out xmin);
bool bymin = double.TryParse(vals[1], out ymin);
bool bxmax = double.TryParse(vals[2], out xmax);
bool bymax = double.TryParse(vals[3], out ymax);
if (bxmin && bymin && bxmax && bymax)
{
ISpatialReference sr = null;
if (useBboxSR)
{
sr = helper.GetSpatialReference(bboxSRID);
if (sr == null)
{
//erroneous srid, ignore bounding box
useBbox = false;
}
}
else
{
sr = helper.getWGS84();
}
if (useBbox)
{
queryGeom = new Polygon() as IPolygon;
IPointCollection coll = queryGeom as IPointCollection;
coll.AddPoint(new Point()
{
X = xmin, Y = ymin, SpatialReference = sr
});
coll.AddPoint(new Point()
{
X = xmin, Y = ymax, SpatialReference = sr
});
coll.AddPoint(new Point()
{
X = xmax, Y = ymax, SpatialReference = sr
});
coll.AddPoint(new Point()
{
X = xmax, Y = ymin, SpatialReference = sr
});
coll.AddPoint(new Point()
{
X = xmin, Y = ymin, SpatialReference = sr
});
queryGeom.SpatialReference = sr;
}
}
else
{
useBbox = false;
}
}
else
{
useBbox = false;
}
}
catch
{
useBbox = false;
}
}
long?layerOrdinal;
found = operationInput.TryGetAsLong("layer", out layerOrdinal); //.TryGetString("layer", out parm2Value);
if (!found)
{
throw new ArgumentNullException("layer");
}
string s = "";
ESRI.ArcGIS.Carto.IMapServer mapServer = (ESRI.ArcGIS.Carto.IMapServer)serverObjectHelper.ServerObject;
ESRI.ArcGIS.Carto.IMapServerDataAccess mapServerObjects = (ESRI.ArcGIS.Carto.IMapServerDataAccess)mapServer;
var lyr = mapServerObjects.GetDataSource(mapServer.DefaultMapName, Convert.ToInt32(layerOrdinal));
if (lyr is IFeatureClass)
{
IFeatureClass fclass = (IFeatureClass)lyr;
retval = "{\"shape\": \"" + fclass.ShapeFieldName + "\"}";
IQueryFilter filter = null;
if (useBbox)
{
IGeoDataset gds = fclass as IGeoDataset;
filter = new SpatialFilterClass();
ISpatialFilter spf = filter as ISpatialFilter;
spf.Geometry = helper.TransformShapeCS(queryGeom, queryGeom.SpatialReference, gds.SpatialReference);
spf.GeometryField = fclass.ShapeFieldName;
spf.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
}
else
{
filter = new QueryFilterClass();
}
filter.set_OutputSpatialReference(fclass.ShapeFieldName, getWGS84());
if (applyQuery)
{
filter.WhereClause = whereClause;
}
IFeatureCursor curs = fclass.Search(filter, false);
//apply extension methods here
try
{
s = curs.ToGeoJson();
Marshal.ReleaseComObject(curs);
}
catch (Exception ex)
{
s = ex.GetBaseException().ToString(); //.StackTrace;
}
retval = s;
}
else
{
throw new Exception("Layer " + layerOrdinal.ToString() + " is not a feature layer.");
}
return(Encoding.UTF8.GetBytes(retval));
}
