ZoomTo(IEnumerable<Layer>,Boolean,Nullable<TimeSpan>,Boolean) Method

In This Topic

Zoom the view to the extent of one or more layers. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

Visual Basic (Declaration)
C#

Public Overloads Function ZoomTo( _
   ByVal layers As IEnumerable(Of Layer), _
   Optional ByVal selectedOnly As Boolean, _
   Optional ByVal duration As Nullable(Of TimeSpan), _
   Optional ByVal maintainViewDirection As Boolean _
) As Boolean

public bool ZoomTo( 
   IEnumerable<Layer> layers,
   bool selectedOnly,
   Nullable<TimeSpan> duration,
   bool maintainViewDirection
)

Parameters

layers: An enumeration of layers containing the features in which to zoom.
selectedOnly: Indicates whether only the selected features for a layer should be used to determine the extent in which to zoom.
duration: The amount of time to navigate the view to the new camera position. If null it uses the default navigation duration.
maintainViewDirection: Indicates if the Pitch and Heading should remain the same after the navigation is completed. If false the Heading will be set to 15.0 and the Pitch will be set to -60.0. This parameter only effects 3D views.

Return Value

True if the navigation is completed, false if it was interrupted by another view navigation.

Exceptions

Exception	Description
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run.

Example

Zoom to a specified point

{
  double x = -122.45;
  double y = 37.75;
  double buffer_size = 0.1;
  //Create a point
  var pt = MapPointBuilderEx.CreateMapPoint(x, y,
                 SpatialReferenceBuilder.CreateSpatialReference(4326));
  //Buffer it - for purpose of zoom
  var poly = GeometryEngine.Instance.Buffer(pt, buffer_size);

  //do we need to project the buffer polygon?
  if (!MapView.Active.Map.SpatialReference.IsEqual(poly.SpatialReference))
  {
    //project the polygon
    poly = GeometryEngine.Instance.Project(poly, MapView.Active.Map.SpatialReference);
  }

  // Must run on MCT.
  QueuedTask.Run(() =>
  {
    //Zoom - add in a delay for animation effect
    MapView.Active.ZoomTo(poly, new TimeSpan(0, 0, 0, 3));
  });
}

Zoom To a Point

{
  // Note: Needs QueuedTask to run
  {
    //Create a point
    var pt = MapPointBuilderEx.CreateMapPoint(x, y, spatialReference);
    //Buffer it - for purpose of zoom
    var poly = GeometryEngine.Instance.Buffer(pt, buffer_size);

    //do we need to project the buffer polygon?
    if (!MapView.Active.Map.SpatialReference.IsEqual(poly.SpatialReference))
    {
      //project the polygon
      poly = GeometryEngine.Instance.Project(poly, MapView.Active.Map.SpatialReference);
    }

    //Zoom - add in a delay for animation effect
    mapView.ZoomTo(poly, new TimeSpan(0, 0, 0, 3));
  }
}

Zoom To Visible Layers

{
  // Note: Needs QueuedTask to run
  {
    //Zoom to all visible layers in the map.
    var visibleLayers = mapView.Map.Layers.Where(l => l.IsVisible);
    mapView.ZoomTo(visibleLayers);
  }
}

Rotate the map view

{
  //Get the camera for the view, adjust the heading and zoom to the new camera position.
  camera = mapView.Camera;
  camera.Heading = heading;
  await mapView.ZoomToAsync(camera, TimeSpan.Zero);
  //Or synchronously
  mapView.ZoomTo(camera, TimeSpan.Zero);
}

Requirements

Target Platforms: Windows 11 Home, Pro, Enterprise (64 bit)

ArcGIS Pro version: 3.0 or higher.

Reference

MapView Class
MapView Members
Overload List

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