public GraphTable(IGraphTableAdapter adapter)
{
_adapter = adapter;
_table = new DataTable();
_table.Columns.Add(new DataColumn("N1", typeof(int)));
_table.Columns.Add(new DataColumn("N2", typeof(int)));
_table.Columns.Add(new DataColumn("EID", typeof(int)));
_table.Columns.Add(new DataColumn("LENGTH", typeof(double)));
_table.Columns.Add(new DataColumn("GEOLEN", typeof(double)));
_table.Columns.Add(new DataColumn("COST", typeof(double)));
_table.Columns.Add(new DataColumn("PN", typeof(int)));
}
async public Task <IGraphEdge> GetGraphEdge(IPoint point, double tolerance)
{
if (point == null)
{
return(null);
}
SpatialFilter filter = new SpatialFilter();
filter.Geometry = new Envelope(point.X - tolerance, point.Y - tolerance,
point.X + tolerance, point.Y + tolerance);
filter.AddField("FDB_SHAPE");
filter.AddField("FDB_OID");
using (IFeatureCursor cursor = await GetEdgeFeatures(filter))
{
IFeature feature, selected = null;
double selectedDist = double.MaxValue;
int selectedFcId = int.MinValue;
IPoint snappedPoint = null;
while ((feature = await cursor.NextFeature()) != null)
{
if (!(feature.Shape is IPolyline) ||
feature.FindField("NETWORK#FCID") == null)
{
continue;
}
int fcid = (int)feature["NETWORK#FCID"];
double dist, stat;
IPoint spoint = gView.Framework.SpatialAlgorithms.Algorithm.Point2PolylineDistance((IPolyline)feature.Shape, point, out dist, out stat);
if (spoint == null)
{
continue;
}
if (selected == null || dist <= selectedDist)
{
if (fcid != -1)
{
#region Do complex Edge exists
IFeatureClass complexEdgeFc = _edgeFcs[-1];
if (complexEdgeFc != null)
{
QueryFilter complexEdgeFilter = new QueryFilter();
complexEdgeFilter.WhereClause = "FCID=" + fcid + " AND OID=" + feature.OID;
complexEdgeFilter.AddField("FDB_OID");
using (IFeatureCursor complexEdgeCursor = await complexEdgeFc.GetFeatures(complexEdgeFilter))
{
if (await complexEdgeCursor.NextFeature() != null)
{
continue;
}
}
}
#endregion
}
selected = feature;
selectedDist = dist;
selectedFcId = fcid;
snappedPoint = spoint;
}
}
if (selected == null)
{
return(null);
}
int eid = -1;
if (selectedFcId == -1)
{
#region Complex Edge
object eidObj = await _fdb._conn.QuerySingleField("SELECT EID FROM " + _fdb.TableName("FC_" + _name + "_ComplexEdges") + " WHERE FDB_OID=" + selected.OID, "EID");
if (eidObj != null)
{
eid = (int)eidObj;
}
#endregion
}
else
{
object eidObj = await _fdb._conn.QuerySingleField("SELECT EID FROM " + _fdb.TableName(_name + "_EdgeIndex") + " WHERE FCID=" + selectedFcId + " AND OID=" + selected.OID, "EID");
if (eidObj != null)
{
eid = (int)eidObj;
}
}
if (eid != -1)
{
point.X = snappedPoint.X;
point.Y = snappedPoint.Y;
IGraphTableAdapter gt = this.GraphTableAdapter();
return(gt.QueryEdge(eid));
}
return(null);
}
}
