This document is archived and information here might be outdated.  Recommended version.

Change Map Spatial Reference Snippet (ArcObjects .NET 10.5 SDK)

ArcObjects Library Reference

Change Map Spatial Reference Snippet

[C#]

///<summary>Use the SpatialReferenceDialog to change the coordinate system or spatial reference of the map.</summary>
///
///<param name="hWnd">The application window handle.</param>
///<param name="map">An IMap interface.</param>
/// 
///<remarks></remarks>
public void ChangeMapSpatialReference(System.Int32 hWnd, ESRI.ArcGIS.Carto.IMap map)
{
  if(map == null)
  {
    return;
  }
  
  ESRI.ArcGIS.CatalogUI.ISpatialReferenceDialog2 spatialReferenceDialog=new ESRI.ArcGIS.CatalogUI.SpatialReferenceDialogClass();
  ESRI.ArcGIS.Geometry.ISpatialReference spatialReference=spatialReferenceDialog.DoModalCreate(true, false, false, hWnd);
  if ((!(map.SpatialReferenceLocked)))
  {
    map.SpatialReference=spatialReference; 
  }
}

[Visual Basic .NET]

'''<summary>Use the SpatialReferenceDialog to change the coordinate system or spatial reference of the map.</summary>
'''
'''<param name="hWnd">The application window handle.</param>
'''<param name="map">An IMap interface.</param>
''' 
'''<remarks></remarks>
Public Sub ChangeMapSpatialReference(ByVal hWnd As System.Int32, ByVal map As ESRI.ArcGIS.Carto.IMap)

  If map Is Nothing Then

    Return

  End If

  Dim spatialReferenceDialog As ESRI.ArcGIS.CatalogUI.ISpatialReferenceDialog2=New ESRI.ArcGIS.CatalogUI.SpatialReferenceDialogClass
  Dim spatialReference As ESRI.ArcGIS.Geometry.ISpatialReference=spatialReferenceDialog.DoModalCreate(True, False, False, hWnd)

  If (Not (map.SpatialReferenceLocked)) Then

    map.SpatialReference=spatialReference

  End If

End Sub