ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Geometry Namespace / GeometryEngine Class / ExportToWKB Method / ExportToWKB(WkbExportFlags,Geometry,Byte[]) Method
A combination of WkbExportFlags which determines how the geometry is exported.
The geometry to write to the buffer.
The buffer to which the geometry will be written. The buffer must be large enough to hold the OGC well-known binary version of the input geometry.
Example

In This Topic
    ExportToWKB(WkbExportFlags,Geometry,Byte[]) Method
    In This Topic
    Writes an OGC well-known binary formatted version of the input geometry to the specified buffer.
    Syntax
    public int ExportToWKB( 
       WkbExportFlags exportFlags,
       Geometry geometry,
       ref byte[] buffer
    )
    Public Overloads Function ExportToWKB( _
       ByVal exportFlags As WkbExportFlags, _
       ByVal geometry As Geometry, _
       ByRef buffer() As Byte _
    ) As Integer

    Parameters

    exportFlags
    A combination of WkbExportFlags which determines how the geometry is exported.
    geometry
    The geometry to write to the buffer.
    buffer
    The buffer to which the geometry will be written. The buffer must be large enough to hold the OGC well-known binary version of the input geometry.

    Return Value

    The exact number of bytes written to the buffer.
    Exceptions
    ExceptionDescription
    Geometry is null or empty.
    The method is not implemented for GeometryBag or Multipatch.
    The method is not implemented for geometry with curves.
    Remarks
    Does not support curves. Also, note that if the geometry contains ID information, this property will not be preserved in the export operation. The WKB OGC standard does not contain the ID property.
    Example
    Import and Export Geometries to well-known Binary
    // create a polyline
    List<Coordinate2D> coords = new List<Coordinate2D>
    {
      new Coordinate2D(0, 0),
      new Coordinate2D(0, 1),
      new Coordinate2D(1, 1),
      new Coordinate2D(1, 0)
    };
    
    Polyline polyline = PolylineBuilderEx.CreatePolyline(
                coords, SpatialReferences.WGS84);
    
    WkbExportFlags wkbExportFlags = WkbExportFlags.WkbExportDefaults;
    WkbImportFlags wkbImportFlags = WkbImportFlags.WkbImportDefaults;
    
    // export and import
    byte[] buffer = GeometryEngine.Instance.ExportToWKB(wkbExportFlags, polyline);
    Geometry geometry = GeometryEngine.Instance.ImportFromWKB(
                   wkbImportFlags, buffer, SpatialReferences.WGS84);
    Polyline importPolyline = geometry as Polyline;
    
    
    // alternatively, determine the size for the buffer
    int bufferSize = GeometryEngine.Instance.GetWKBSize(wkbExportFlags, polyline);
    buffer = new byte[bufferSize];
    // export
    bufferSize = GeometryEngine.Instance.ExportToWKB(
                    wkbExportFlags, polyline, ref buffer);
    // import
    importPolyline = GeometryEngine.Instance.ImportFromWKB(
             wkbImportFlags, buffer, SpatialReferences.WGS84) as Polyline;
    
    Requirements

    Target Platforms: Windows 11, Windows 10, Windows 8.1

    See Also