ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Data.Topology Namespace / ValidationDescription Class
Members Example

In This Topic
    ValidationDescription Class
    In This Topic
    Represents a mechanism to validate a Topology.
    Object Model
    ValidationDescription ClassEnvelope Class
    Syntax
    public sealed class ValidationDescription 
    Public NotInheritable Class ValidationDescription 
    Example
    ValidateTopology
    public void ValidateTopology()
    {
      using (Geodatabase geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(@"C:\TestData\GrandTeton.gdb"))))
      using (Topology topology = geodatabase.OpenDataset<Topology>("Backcountry_Topology"))
      {
        // If the topology currently does not have dirty areas, calling Validate() returns an empty envelope.
    
        ValidationResult result = topology.Validate(new ValidationDescription(topology.GetExtent()));
        Console.WriteLine($"'AffectedArea' after validating a topology that has not been edited => {result.AffectedArea.ToJson()}");
    
        // Now create a feature that purposely violates the "PointProperlyInsideArea" topology rule.  This action will
        // create dirty areas.
    
        Feature newFeature = null;
    
        try
        {
          // Fetch the feature in the Campsites feature class whose objectID is 2.  Then create a new geometry slightly
          // altered from this and use it to create a new feature.
    
          using (Feature featureViaCampsites2 = GetFeature(geodatabase, "Campsites", 2))
          {
            Geometry currentGeometry = featureViaCampsites2.GetShape();
            Geometry newGeometry = GeometryEngine.Instance.Move(currentGeometry, (currentGeometry.Extent.XMax / 8),
              (currentGeometry.Extent.YMax / 8));
    
            using (FeatureClass campsitesFeatureClass = featureViaCampsites2.GetTable())
            using (FeatureClassDefinition definition = campsitesFeatureClass.GetDefinition())
            using (RowBuffer rowBuffer = campsitesFeatureClass.CreateRowBuffer())
            {
              rowBuffer[definition.GetShapeField()] = newGeometry;
    
              geodatabase.ApplyEdits(() =>
              {
                newFeature = campsitesFeatureClass.CreateRow(rowBuffer);
              });
            }
          }
    
          // After creating a new feature in the 'Campsites' participating feature class, the topology's state should be 
          // "Unanalyzed" because it has not been validated.
    
          Console.WriteLine($"The topology state after an edit has been applied => {topology.GetState()}");
    
          // Now validate the topology.  The result envelope corresponds to the dirty areas.
    
          result = topology.Validate(new ValidationDescription(topology.GetExtent()));
          Console.WriteLine($"'AffectedArea' after validating a topology that has just been edited => {result.AffectedArea.ToJson()}");
    
          // After Validate(), the topology's state should be "AnalyzedWithErrors" because the topology currently has errors.
    
          Console.WriteLine($"The topology state after validate topology => {topology.GetState()}");
    
          // If there are no dirty areas, the result envelope should be empty.
    
          result = topology.Validate(new ValidationDescription(topology.GetExtent()));
          Console.WriteLine($"'AffectedArea' after validating a topology that has just been validated => {result.AffectedArea.ToJson()}");
        }
        finally
        {
          if (newFeature != null)
          {
            geodatabase.ApplyEdits(() =>
            {
              newFeature.Delete();
            });
    
            newFeature.Dispose();
          }
        }
    
        // Validate again after deleting the newly-created feature.
    
        topology.Validate(new ValidationDescription(topology.GetExtent()));
      }
    }
    
    private Feature GetFeature(Geodatabase geodatabase, string featureClassName, long objectID)
    {
      using (FeatureClass featureClass = geodatabase.OpenDataset<FeatureClass>(featureClassName))
      {
        QueryFilter queryFilter = new QueryFilter()
        {
          ObjectIDs = new List<long>() { objectID }
        };
    
        using (RowCursor cursor = featureClass.Search(queryFilter))
        {
          System.Diagnostics.Debug.Assert(cursor.MoveNext());
          return (Feature)cursor.Current;
        }
      }
    }
    
    Inheritance Hierarchy

    System.Object
       ArcGIS.Core.Data.Topology.ValidationDescription

    Requirements

    Target Platforms: Windows 11, Windows 10, Windows 8.1

    See Also