private FdoRow Flatten(FdoRow row)
{
//Not applicable?
if (row.Geometry == null)
{
return(row);
}
//Already 2D? Move along!
if (FdoGeometryUtil.Is2D(row.Geometry))
{
return(row);
}
IGeometry geom = row.Geometry;
IGeometry trans = FdoGeometryUtil.Flatten(geom, _geomFactory);
//Dispose the original if flatten returned a new instance
if (!IGeometry.ReferenceEquals(geom, trans))
{
row.Geometry = trans;
geom.Dispose();
}
return(row);
}
private void btnPreview_Click(object sender, EventArgs e)
{
try
{
using (IGeometry fgeom = _geomFactory.CreateGeometry(txtGeometry.Text))
{
byte[] wkb = null;
if (!FdoGeometryUtil.Is2D(fgeom))
{
using (IGeometry ffgeom = FdoGeometryUtil.Flatten(fgeom, _geomFactory))
{
wkb = _geomFactory.GetWkb(ffgeom);
}
}
else
{
wkb = _geomFactory.GetWkb(fgeom);
}
SharpMap.Geometries.Geometry sgeom = SharpMap.Geometries.Geometry.GeomFromWKB(wkb);
_layer.DataSource = new SharpMap.Data.Providers.GeometryProvider(sgeom);
SharpMap.Geometries.BoundingBox bbox = _mapCtl.Map.GetExtents();
bbox = bbox.Grow(2.0, 2.0);
_mapCtl.Map.ZoomToBox(bbox);
_mapCtl.Refresh();
btnOK.Enabled = true;
}
}
catch (Exception)
{
MessageService.ShowError("The specified text does not constitute a valid geometry");
btnOK.Enabled = false;
}
}
/// <summary>
/// Converts an FDO Geometry to a SharpMap geometry
/// </summary>
/// <param name="geom">The FDO geometry</param>
/// <returns></returns>
public static Sm.Geometry FromFdoGeometry(FdoGeometry geom, OSGeo.FDO.Geometry.FgfGeometryFactory geomFactory)
{
if (FdoGeometryUtil.Is2D(geom.InternalInstance))
{
//Get the WKB form of the geometry
byte[] wkb = FdoGeometryFactory.Instance.GetWkb(geom.InternalInstance);
return(GeometryFromWKB.Parse(wkb));
}
else
{
using (OSGeo.FDO.Geometry.IGeometry flattened = FdoGeometryUtil.Flatten(geom.InternalInstance, geomFactory))
{
//Get the WKB form of the geometry
byte[] wkb = FdoGeometryFactory.Instance.GetWkb(flattened);
return(GeometryFromWKB.Parse(wkb));
}
}
}