GetViewCenter Method

In This Topic

Get the center point of the current extent of the map frame view. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public MapPoint GetViewCenter()

Public Function GetViewCenter() As MapPoint

Return Value

ArcGIS.Core.Geometry.MapPoint

Exceptions

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

Remarks

Works for 2D or 3D maps associated with the frame

Example

SetAutoCameraFixedCenter

var layout = LayoutView.Active.Layout;
var mf = layout.GetElementsAsFlattenedList().OfType<MapFrame>()
  .First(mf => mf.Name == mapFrame);
var autoCamera = mf.GetAutoCamera();
autoCamera.Source = AutoCameraSource.Fixed;
autoCamera.AutoCameraType = AutoCameraType.Center;

var camera = mf.GetMapView(LayoutView.Active).Camera;
var center = mf.GetViewCenter();

//var extent = EnvelopeBuilderEx.CreateEnvelope(
//    400748.62, 800296.4, 1310669.05, 1424520.74, mf.Map.SpatialReference);
//autoCamera.Extent = extent;

var camera2 = new CIMViewCamera()
{
  Heading = 0,
  Pitch = -90,
  Roll = 0,
  Scale = 21169571,
  X = 855708,
  Y = 1112409,
  Z = double.NaN
};
autoCamera.Camera = camera2;
var states = mf.Map.GetLayersAsFlattenedList().First(l => l.Name == "State_Polygons");
autoCamera.IntersectLayerPath = states.URI;

if (mf.ValidateAutoCamera(autoCamera) &&
  !mf.IsMapSeriesMapFrame())
  mf.SetAutoCamera(autoCamera);

SetAutoCameraFixedCenterAndScale

var layout = LayoutView.Active.Layout;
var mf = layout.GetElementsAsFlattenedList().OfType<MapFrame>()
  .First(mf => mf.Name == mapFrame);
var autoCamera = mf.GetAutoCamera();
autoCamera.Source = AutoCameraSource.Fixed;
autoCamera.AutoCameraType = AutoCameraType.CenterAndScale;

var camera = mf.GetMapView(LayoutView.Active).Camera;
var center = mf.GetViewCenter();

//var extent = EnvelopeBuilderEx.CreateEnvelope(
//    400748.62, 800296.4, 1310669.05, 1424520.74, mf.Map.SpatialReference);
//autoCamera.Extent = extent;

var camera2 = new CIMViewCamera()
{
  Heading = 0,
  Pitch = -90,
  Roll = 0,
  Scale = 21169571,
  X = 1310669.0 + ((400748.5 - 1310669.0) / 2.0),
  Y = 800296.4 + ((1424520.74 - 800296.4) / 2.0),
  Z = double.NaN
};
autoCamera.Camera = camera2;
var states = mf.Map.GetLayersAsFlattenedList().First(l => l.Name == "State_Polygons");
//autoCamera.IntersectLayerPath = states.URI;


if (mf.ValidateAutoCamera(autoCamera) &&
  !mf.IsMapSeriesMapFrame())
  mf.SetAutoCamera(autoCamera);

SetAutoCameraFixedScale

var layout = LayoutView.Active.Layout;
var mf = layout.GetElementsAsFlattenedList().OfType<MapFrame>()
  .First(mf => mf.Name == mapFrame);
var autoCamera = mf.GetAutoCamera();
autoCamera.Source = AutoCameraSource.Fixed;
autoCamera.AutoCameraType = AutoCameraType.Scale;

var camera = mf.GetMapView(LayoutView.Active).Camera;
var center = mf.GetViewCenter();

//var extent = EnvelopeBuilderEx.CreateEnvelope(
//    400748.62, 800296.4, 1310669.05, 1424520.74, mf.Map.SpatialReference);
//autoCamera.Extent = extent;

var camera2 = new CIMViewCamera()
{
  Heading = 0,
  Pitch = -90,
  Roll = 0,
  Scale = 20000571,
  X = 1310669.0 + ((400748.5 - 1310669.0) / 2.0),
  Y = 800296.4 + ((1424520.74 - 800296.4) / 2.0),
  Z = double.NaN
};
autoCamera.Camera = camera2;
var states = mf.Map.GetLayersAsFlattenedList().First(l => l.Name == "State_Polygons");
//autoCamera.IntersectLayerPath = states.URI;

if (mf.ValidateAutoCamera(autoCamera) &&
  !mf.IsMapSeriesMapFrame())
  mf.SetAutoCamera(autoCamera);

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

MapFrame Class
MapFrame Members

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