/// <summary>
/// Provides a list of parcel id with associated address in the formatted string
/// </summary>
/// <param name="topologyGraph">The topology graph of the area of interest. <see cref="ITopologyGraph"/></param>
/// <param name="parcelsToCentroidMap">A dictionary object containing the parcel id and its centroid</param>
/// <returns>A formatted list of parcel and its address information</returns>
private List <string> GetParcelsWithAddress(ITopologyGraph topologyGraph, Dictionary <int, IPoint> parcelsToCentroidMap)
{
List <string> parcelWithAddressList = new List <string>();
if (topologyGraph == null || parcelsToCentroidMap.Count < 1)
{
return(null);
}
// Iterating parcels to fetch the address node from the topology graph
foreach (KeyValuePair <int, IPoint> keyValuePair in parcelsToCentroidMap)
{
int parcelID = keyValuePair.Key;
IPoint parcelCentroid = keyValuePair.Value;
ITopologyElement addressToplogyElement;
double hitRadius;
// Find a topology element that is closest to the parcel centroid and with in the search radius of 10.0. If success the method will return the address topology node
bool isElementFound = topologyGraph.HitTest((int)esriTopologyElementType.esriTopologyNode, parcelCentroid, 10.0, null, out hitRadius, out addressToplogyElement);
if (addressToplogyElement != null && isElementFound)
{
IEnumTopologyParent addressElementParents = addressToplogyElement.Parents;
addressElementParents.Reset();
//Iterate over topology element parents
for (int addressElementCount = 0; addressElementCount < addressElementParents.Count; addressElementCount++)
{
esriTopologyParent addressElementParent = addressElementParents.Next();
int addressFID = addressElementParent.m_FID;
IFeatureClass addressFC = addressElementParent.m_pFC;
// Fetch address feature
IFeature addressFeature = GetFeature(addressFC, addressFID);
// Get parcel address index
int addressIndex = addressFeature.Fields.FindField("ADDRESS");
if (addressIndex >= 0)
{
// Get parcel address value
string addressValue = addressFeature.Value[addressIndex].ToString();
// Add parcel ID and address value
parcelWithAddressList.Add($"Parcel ID: {parcelID} / Address Coordinates: {addressValue}");
}
}
}
}
return(parcelWithAddressList);
}
