private static object FindInDataset(GxCatalog _catalog, string path, out int numberFound)
{
numberFound = 0;
int lastBackslashIndex = path.LastIndexOf('\\');
int lastBackslashIndexPlusOne = lastBackslashIndex + 1;
if (lastBackslashIndex == -1 || lastBackslashIndexPlusOne == path.Length)
return null;
string dbName = path.Substring(0,lastBackslashIndex);
string fcName = path.Substring(lastBackslashIndexPlusOne, path.Length - lastBackslashIndexPlusOne);
object obj = _catalog.GetObjectFromFullName(dbName, out numberFound);
if (numberFound == 0)
return null;
IGxObject geoObject;
if (numberFound == 1)
geoObject = obj as IGxObject;
else
geoObject = ((IEnumGxObject)obj).Next(); //get the first and ignore the rest.
numberFound = 0;
if (geoObject == null)
return null;
IGxDatabase db = geoObject as IGxDatabase;
if (db == null || db.Workspace == null)
return null;
foreach (string dsName in GetFeatureDataSetNames(db.Workspace))
{
string newPath = dbName + "\\" + dsName + "\\" + fcName;
obj = _catalog.GetObjectFromFullName(newPath, out numberFound);
if (numberFound != 0)
return obj;
}
return null;
}
//may be called by a background thread with the "Loading" dialog
internal static void LoadWithCatalog(string path)
{
Trace.TraceInformation("{0}: Begin get ESRI Metadata With Catalog for {1}", DateTime.Now, path); Stopwatch time = new Stopwatch(); time.Start();
if (_catalog == null)
_catalog = new GxCatalogClass(); // Fairly quick to return. May throw an exception.
if (_catalog == null)
throw new Exception("Unable to communicate with ArcCatalog");
int numberFound;
//This takes a long time on the first call (loads up the ESRI libraries)
//FIXME - If this is the first time, and we are on the UI thread, then provide feedback
Trace.TraceInformation("{0}: Begin _catalog.GetObjectFromFullName({1}), elapsed ms = {2}", DateTime.Now, path, time.Elapsed.TotalMilliseconds); time.Reset(); time.Start();
object obj = _catalog.GetObjectFromFullName(path, out numberFound);
Trace.TraceInformation("{0}: End _catalog.GetObjectFromFullName({1}), elapsed ms = {2}", DateTime.Now, path, time.Elapsed.TotalMilliseconds); time.Reset(); time.Start();
if (numberFound == 0)
{
// If the user does not have a folder connection to some point above this dataset,
// then ArcGIS will not find the dataset. Therefore:
// try adding the root of path as a new folder connection, and trying again.
_catalog.ConnectFolder(Path.GetPathRoot(path));
obj = _catalog.GetObjectFromFullName(path, out numberFound);
if (numberFound == 0)
// TM2.2 stored the data path without the dataset, so
// database/dataset/featureclass was saved as just database/featureclass
// Therefore if we didn't find database/featureclass, try looking for database/*/featureclass
// FIXME - store the corrected path in the xml file, store uncorrected path in mdb
obj = FindInDataset(_catalog, path, out numberFound);
if (numberFound == 0)
throw new ArgumentException("Path (" + path + ") not found");
}
IGxObject geoObject;
if (numberFound == 1)
geoObject = obj as IGxObject;
else
geoObject = ((IEnumGxObject)obj).Next(); //get the first and ignore the rest.
IPropertySet propertySet;
if (geoObject is IMetadata)
propertySet = ((IMetadata)geoObject).Metadata;
else
throw new ArgumentException("Path (" + path + ") has no metadata");
if (!(propertySet is IXmlPropertySet2))
throw new ArgumentException("Path (" + path + ") metadata not available as XML");
string text = ((IXmlPropertySet2)propertySet).GetXml("");
Trace.TraceInformation("{0}: End get ESRI Metadata With Catalog for {1}, elapsed ms = {2}", DateTime.Now, path, time.Elapsed.TotalMilliseconds);
_cache[path] = text;
return;
}
