/**
* This method returns the utility network dataset.
*/
public IDataset GetUNDataset(IServerObject serverObject, string versionName = null)
{
IMapServer mapService = (MapServer)serverObject;
IMapServerDataAccess mapServerDataAccess = (IMapServerDataAccess)serverObject;
// Get feature class from any layer
IFeatureClass fc = (IFeatureClass)mapServerDataAccess.GetDataSource(mapService.DefaultMapName, 0);
// Get the container feature dataset
IFeatureDataset fd = fc.FeatureDataset;
// Open feature dataset in specified version
if (!String.IsNullOrEmpty(versionName))
{
IWorkspace workspace = fd.Workspace;
IVersionedWorkspace4 versionedWorkspace = (IVersionedWorkspace4)workspace;
IVersion4 childVersion = (IVersion4)versionedWorkspace.FindVersion(versionName);
IFeatureWorkspace childFWS = (IFeatureWorkspace)childVersion;
fd = childFWS.OpenFeatureDataset(fd.Name);
}
// Loop through contained datasets to find the UN one
IDataset ds = (IDataset)fd;
IEnumDataset enumSubDS = ds.Subsets;
IDataset subDS = enumSubDS.Next();
while (subDS != null)
{
if (subDS.Type == esriDatasetType.esriDTUtilityNetwork)
{
return(subDS);
}
subDS = enumSubDS.Next();
}
return(null);
// Alternative approach is to use the dataset extension
/*
* // Get extension container
* IFeatureDatasetExtensionContainer fdce = (IFeatureDatasetExtensionContainer)fd;
*
* // Find UN dataset by type
* IFeatureDatasetExtension unFDSExt = fdce.FindExtension(esriDatasetType.esriDTUtilityNetwork);
* IDatasetContainer2 unDSContainer = (IDatasetContainer2)unFDSExt;
*
* IEnumDatasetName dsNames = unDSContainer.DatasetNames[esriDatasetType.esriDTUtilityNetwork];
*
* IDatasetName dsName = dsNames.Next();
* if (dsName != null)
* {
* unDataset = unDSContainer.DatasetByName[esriDatasetType.esriDTUtilityNetwork, dsName.Name];
* }
*/
}
public IDataset GetUNDataset2(IServerObject serverObject, string versionName = null)
{
IDataset unDataset = null;
IMapServer mapService = (MapServer)serverObject;
IMapServerDataAccess mapServerDataAccess = (IMapServerDataAccess)serverObject;
// Get feature class from any layer
IFeatureClass fc = (IFeatureClass)mapServerDataAccess.GetDataSource(mapService.DefaultMapName, 0);
// Get the container feature dataset
IFeatureDataset fd = fc.FeatureDataset;
// Open feature dataset in specified version
if (!String.IsNullOrEmpty(versionName))
{
IWorkspace workspace = fd.Workspace;
IVersionedWorkspace4 versionedWorkspace = (IVersionedWorkspace4)workspace;
IVersion4 childVersion = (IVersion4)versionedWorkspace.FindVersion(versionName);
IFeatureWorkspace childFWS = (IFeatureWorkspace)childVersion;
fd = childFWS.OpenFeatureDataset(fd.Name);
}
// Get extension container
IFeatureDatasetExtensionContainer fdce = (IFeatureDatasetExtensionContainer)fd;
// Find UN dataset by type
IFeatureDatasetExtension unFDSExt = fdce.FindExtension(esriDatasetType.esriDTUtilityNetwork);
IDatasetContainer2 unDSContainer = (IDatasetContainer2)unFDSExt;
IEnumDatasetName dsNames = unDSContainer.DatasetNames[esriDatasetType.esriDTUtilityNetwork];
IDatasetName dsName = dsNames.Next();
if (dsName != null)
{
unDataset = unDSContainer.DatasetByName[esriDatasetType.esriDTUtilityNetwork, dsName.Name];
}
return(unDataset);
}