public void LoadAnalysisObjectsByGeometry(ESRI.ArcGIS.Geodatabase.IFeatureClass
inputFeatureClass, string naClassName, ESRI.ArcGIS.NetworkAnalyst.INAContext
naContext)
{
// Both Initialize and Load take a cursor from the input feature class
ESRI.ArcGIS.Geodatabase.ICursor cursor = inputFeatureClass.Search(null, false) as
ESRI.ArcGIS.Geodatabase.ICursor;
// Initialize the default field mappings.
// If you want to specify field mappings beyond the default ones, use naClassLoader.FieldMap to retrieve
// and edit the mappings between the input class and the naclass.
ESRI.ArcGIS.NetworkAnalyst.INAClassLoader2 naClassLoader = new
ESRI.ArcGIS.NetworkAnalyst.NAClassLoaderClass();
naClassLoader.Initialize(naContext, naClassName, cursor);
// Use ExcludeRestrictedElements and CacheRestrictedElements to prevent locations from being placed on restricted elements.
// Some ways to restrict elements include restriction barriers and restriction attributes.
// If you are loading barriers into barrier classes, or not loading locations (for example, seedpoints)
// then you should not exclude the restricted elements. Also, if you do have barriers in your analysis problem,
// then you should load those first, to make sure the restricted elements are established before loading
// non-barrier classes.
ESRI.ArcGIS.NetworkAnalyst.INALocator3 naLocator3 = naClassLoader.Locator as
ESRI.ArcGIS.NetworkAnalyst.INALocator3;
naLocator3.ExcludeRestrictedElements = true;
naLocator3.CacheRestrictedElements(naContext);
// After Loading is complete, the rowsIn and rowsLocated variable can be used to verify
// that every row from the input feature class has been loaded into the network analysis class
int rowsIn = 0;
int rowsLocated = 0;
naClassLoader.Load(cursor, null, ref rowsIn, ref rowsLocated);
}
public void LoadAnalysisObjectsByField(ESRI.ArcGIS.Geodatabase.ITable inputClass,
string naClassName, ESRI.ArcGIS.NetworkAnalyst.INAContext naContext)
{
// Both Initialize and Load take a cursor from the input class
ESRI.ArcGIS.Geodatabase.ICursor cursor = inputClass.Search(null, false) as
ESRI.ArcGIS.Geodatabase.ICursor;
ESRI.ArcGIS.NetworkAnalyst.INAClassLoader2 naClassLoader = new
ESRI.ArcGIS.NetworkAnalyst.NAClassLoaderClass();
naClassLoader.Initialize(naContext, naClassName, cursor);
// Store the current set of locator agents, so they can be added back later
int agentCount = naContext.Locator.LocatorAgentCount;
var listOfAgents = new System.Collections.Generic.List <
ESRI.ArcGIS.NetworkAnalyst.INALocatorAgent>();
for (int locIndex = 0; locIndex < agentCount; locIndex++)
{
listOfAgents.Add(naContext.Locator.get_LocatorAgent(locIndex));
}
// Remove the existing locator agents from the locator
// This for loop is done in reverse order, because agents are being removed as the loop executes
for (int locIndex = agentCount - 1; locIndex >= 0; locIndex--)
{
naContext.Locator.RemoveLocatorAgent(locIndex);
}
// Create and add a fields agent
var fieldsAgent = new
ESRI.ArcGIS.NetworkAnalyst.NALocatorLocationFieldsAgentClass() as
ESRI.ArcGIS.NetworkAnalyst.INALocatorLocationFieldsAgent2;
// Set the field names appropriately based on input data and NAClass
var naClass = naContext.NAClasses.get_ItemByName(naClassName) as
ESRI.ArcGIS.NetworkAnalyst.INAClass;
var naFeatureClass = naClass as ESRI.ArcGIS.Geodatabase.IFeatureClass;
// Check to see if the NAClass is of type NALocation or NALocationRanges
ESRI.ArcGIS.esriSystem.UID naLocationFeatureUID = new
ESRI.ArcGIS.esriSystem.UIDClass();
naLocationFeatureUID.Value = "esriNetworkAnalyst.NALocationFeature";
ESRI.ArcGIS.esriSystem.UID naLocationFeatureRangesUID = new
ESRI.ArcGIS.esriSystem.UIDClass();
naLocationFeatureRangesUID.Value = "esriNetworkAnalyst.NALocationRangesFeature";
if (naFeatureClass.CLSID.Compare(naLocationFeatureUID))
{
// The field names listed below are the names used in ArcGIS Network Analyst extension classes to represent NALocations.
// These are also the names of fields added by the CalculateLocations geoprocessing tool
fieldsAgent.OIDFieldName = "SourceOID";
fieldsAgent.SourceIDFieldName = "SourceID";
fieldsAgent.PositionFieldName = "PosAlong";
fieldsAgent.SideFieldName = "SideOfEdge";
}
else if (naFeatureClass.CLSID.Compare(naLocationFeatureRangesUID))
{
// The location ranges input field must be of type BLOB
fieldsAgent.LocationRangesFieldName = "Locations";
var blobField = inputClass.Fields.get_Field(inputClass.FindField
(fieldsAgent.LocationRangesFieldName));
if (blobField.Type !=
ESRI.ArcGIS.Geodatabase.esriFieldType.esriFieldTypeBlob)
{
System.Windows.Forms.MessageBox.Show(
"Loading location ranges by field requires a blob field");
return;
}
}
naContext.Locator.AddLocatorAgent(fieldsAgent as
ESRI.ArcGIS.NetworkAnalyst.INALocatorAgent);
// After Loading is complete, the rowsIn and rowsLocated variable can be used to verify
// that every row from the input feature class has been loaded into the network analysis class
int rowsIn = 0;
int rowsLocated = 0;
naClassLoader.Load(cursor, null, ref rowsIn, ref rowsLocated);
// Now remove the custom fields agent and add back the stored agents
naContext.Locator.RemoveLocatorAgent(0);
foreach (var agent in listOfAgents)
{
naContext.Locator.AddLocatorAgent(agent);
}
}
