Loading Element Hierarchy

 1// Get the Database
 2PISystems myPISystems = new PISystems();
 3PISystem myPISystem = myPISystems.DefaultPISystem;
 4if (myPISystem == null)
 5    throw new InvalidOperationException("Default PISystem was not found.");
 6AFDatabase myDB = myPISystem.Databases[dbName];
 7if (myDB == null)
 8    throw new InvalidOperationException("Database was not found.");
 9
10// Get a specific area of the element hierarchy to load 
11AFElement myNorthPlantArea56 = myDB.Elements[@"NorthPlant\Area56"];
12if (myNorthPlantArea56 == null)
13    throw new InvalidOperationException(@"Element 'NorthPlant\Area56' was not found.");
14
15// Use AFElement.LoadToDepth to fully load this part of the hierarchy.
16// This will utilize fewer RPC's than navigating through the hierarchy
17// one element at a time.  Note that care needs to be taken to not attempt
18// to load too many objects into memory at once.  Here, we limit the load
19// to 3 additional levels of the hierarchy, not to exceed 1000 total elements.
20AFNamedCollectionList<AFElement> allElements = AFElement.LoadElementsToDepth(
21    myNorthPlantArea56.Elements, true, 3, 1000);
22
23// Once the elements are loaded, we can process them as usual. In the example
24// below, we have written a recursive routine which counts the bad data for the
25// entire element hierarchy.
26int badDataCount = CountBadData(myNorthPlantArea56, 4);
27
28Console.WriteLine("Found {0} Elements which contain {1} Attributes with bad data.",
29    allElements.Count, badDataCount);
30
31// Prevent garbage collection by the .NET CLR until this point.
32GC.KeepAlive(allElements);