// Checks the specified relationship of the two shapes
private void RelateButton_Click(object sender, RoutedEventArgs e)
{
try
{
if (graphicsLayer.Graphics.Count < 2)
{
throw new ApplicationException("No shapes abailable for relationship test");
}
var shape1 = graphicsLayer.Graphics[0].Geometry;
var shape2 = graphicsLayer.Graphics[1].Geometry;
string relate = comboRelate.Text;
if (relate.Length < 9)
{
throw new ApplicationException("DE-9IM relate string must be 9 characters");
}
relate = relate.Substring(0, 9);
bool isRelated = GeometryEngine.Relate(shape1, shape2, relate);
resultPanel.Visibility = Visibility.Visible;
resultPanel.Background = new SolidColorBrush((isRelated) ? Color.FromArgb(0x66, 0, 0xFF, 0) : Color.FromArgb(0x66, 0xFF, 0, 0));
resultPanel.DataContext = string.Format("Relationship: '{0}' is {1}", relate, isRelated.ToString());
}
catch (Exception ex)
{
resultPanel.Visibility = Visibility.Collapsed;
MessageBox.Show("Error: " + ex.Message, "Relationship Sample");
}
}
// Checks the specified relationship of the two shapes
private void RelateButton_Click(object sender, RoutedEventArgs e)
{
try
{
if (_graphicsOverlay.Graphics.Count < 2)
{
throw new Exception("No shapes available for relationship test");
}
var shape1 = _graphicsOverlay.Graphics[0].Geometry;
var shape2 = _graphicsOverlay.Graphics[1].Geometry;
string relate = txtRelation.Text;
if (relate.Length < 9)
{
throw new Exception("DE-9IM relate string must be 9 characters");
}
relate = relate.Substring(0, 9);
bool isRelated = GeometryEngine.Relate(shape1, shape2, relate);
resultPanel.Visibility = Visibility.Visible;
resultPanel.Background = new SolidColorBrush((isRelated) ? Color.FromArgb(0x66, 0, 0xFF, 0) : Color.FromArgb(0x66, 0xFF, 0, 0));
resultPanel.DataContext = string.Format("Relationship: '{0}' is {1}", relate, isRelated.ToString());
}
catch (Exception ex)
{
resultPanel.Visibility = Visibility.Collapsed;
var _x = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}
/// <summary>
/// Method to perform the cut operation on the geometry and change attributes
/// </summary>
/// <param name="geometry">Line geometry used to perform the cut against in the polygon features
/// in the active map view.</param>
/// <returns>If the cut operation was successful.</returns>
protected Task <bool> ExecuteCut(Geometry geometry)
{
if (geometry == null)
{
return(Task.FromResult(false));
}
// create an edit operation
EditOperation cutOperation = new EditOperation();
cutOperation.Name = "Cut Elements";
cutOperation.ProgressMessage = "Working...";
cutOperation.CancelMessage = "Operation canceled.";
cutOperation.ErrorMessage = "Error cutting polygons";
cutOperation.SelectModifiedFeatures = false;
cutOperation.SelectNewFeatures = false;
// create a collection of feature layers that can be edited
var editableLayers = ActiveMapView.Map.GetLayersAsFlattenedList()
.OfType <FeatureLayer>()
.Where(lyr => lyr.CanEditData() == true).Where(lyr =>
lyr.ShapeType == esriGeometryType.esriGeometryPolygon);
// ensure that there are target layers
if (editableLayers.Count() == 0)
{
return(Task.FromResult(false));
}
// initialize a list of ObjectIDs that need to be cut
var cutOIDs = new List <long>();
// for each of the layers
foreach (FeatureLayer editableFeatureLayer in editableLayers)
{
// find the features crossed by the sketch geometry
var rowCursor = editableFeatureLayer.Search(geometry, SpatialRelationship.Crosses);
// get the feature class associated with the layer
Table fc = editableFeatureLayer.GetTable();
// find the field index for the 'Description' attribute
int descriptionIndex = -1;
descriptionIndex = fc.GetDefinition().FindField("Description");
// add the feature IDs into our prepared list
while (rowCursor.MoveNext())
{
var feature = rowCursor.Current as Feature;
if (feature.GetShape() != null)
{
// we are looking for polygons are completely intersected by the cut line
if (GeometryEngine.Relate(geometry, feature.GetShape(), "TT*F*****"))
{
// add the current feature to the overall list of features to cut
cutOIDs.Add(rowCursor.Current.GetObjectID());
// adjust the attribute before the cut
if (descriptionIndex != -1)
{
cutOperation.Modify(rowCursor.Current, descriptionIndex, "Pro Sample");
}
}
}
}
// add the elements to cut into the edit operation
cutOperation.Cut(editableFeatureLayer, cutOIDs, geometry);
}
//execute the operation
var operationResult = cutOperation.Execute();
return(Task.FromResult(operationResult));
}