ArcGIS Pro 3.2 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / Map Class / ClearSelection Method
Example

In This Topic
    ClearSelection Method (Map)
    In This Topic
    Clear the selection in the map. This method must be called on the MCT. Use QueuedTask.Run.
    Syntax
    public void ClearSelection()
    Public Sub ClearSelection() 
    Exceptions
    ExceptionDescription
    This method or property must be called within the lambda passed to QueuedTask.Run.
    Example
    Use MapView Selection SelectFeaturesEx or GetFeaturesEx
    //var featSceneLayer = ...;
    var sname = featSceneLayer.Name;
    
    await QueuedTask.Run(() =>
    {
      //Select all features within the current map view
      var sz = MapView.Active.GetViewSize();
    
      var c_ll = new Coordinate2D(0, 0);
      var c_ur = new Coordinate2D(sz.Width, sz.Height);
      //Use screen coordinates for 3D selection on MapView
      var env = EnvelopeBuilderEx.CreateEnvelope(c_ll, c_ur);
    
      //HasAssociatedFeatureService does not matter for SelectFeaturesEx
      //or GetFeaturesEx
      var result = MapView.Active.SelectFeaturesEx(env);
      //var result = MapView.Active.GetFeaturesEx(env);
    
      //The list of object ids from SelectFeaturesEx
      //At 2.x - var oids1 = result.Where(kvp => kvp.Key.Name == sname).First().Value;
      var oids1 = result.ToDictionary().Where(kvp => kvp.Key.Name == sname).First().Value;
      //TODO - use the object ids
    
      MapView.Active.Map.ClearSelection();
    });
    
    Use Select or Search with a Spatial Query
    //var featSceneLayer = ...;
    //var sname = featSceneLayer.Name;
    await QueuedTask.Run(() =>
    {
      if (!featSceneLayer.HasAssociatedFeatureService)
        return;//no search or select
    
      //Select all features within the current map view
      var sz = MapView.Active.GetViewSize();
      var map_pt1 = MapView.Active.ClientToMap(new System.Windows.Point(0, sz.Height));
      var map_pt2 = MapView.Active.ClientToMap(new System.Windows.Point(sz.Width, 0));
    
      //Convert to an envelope
      var temp_env = EnvelopeBuilderEx.CreateEnvelope(map_pt1, map_pt2, MapView.Active.Map.SpatialReference);
    
      //Project if needed to the layer spatial ref
      SpatialReference sr = null;
      using (var fc = featSceneLayer.GetFeatureClass())
      using (var fdef = fc.GetDefinition())
        sr = fdef.GetSpatialReference();
    
      var env = GeometryEngine.Instance.Project(temp_env, sr) as Envelope;
    
      //Set up a query filter
      var sf = new SpatialQueryFilter()
      {
        FilterGeometry = env,
        SpatialRelationship = SpatialRelationship.Intersects,
        SubFields = "*"
      };
    
      //Select against the feature service
      var select = featSceneLayer.Select(sf);
      if (select.GetCount() > 0)
      {
        //enumerate over the selected features
        using (var rc = select.Search())
        {
          while (rc.MoveNext())
          {
            using (var feature = rc.Current as Feature)
            {
              var oid = feature.GetObjectID();
              //etc.
            }
          }
        }
      }
    
      MapView.Active.Map.ClearSelection();
    
    });
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also