/// <summary>
/// Change the extent of the map according to the extent of the layer.
/// Reproject the extent if the layer and the map projection differs.
/// </summary>
/// <param name="layer">The layer to be used to calculate the extent</param>
private void ZoomToLayerExtent(layerObj layer)
{
try
{
if (layer.connectiontype == MS_CONNECTION_TYPE.MS_PLUGIN &&
layer.plugin_library == "msplugin_mssql2008.dll")
GetMssqlSpatialLayerExtent(layer);
using (rectObj extent = layer.getExtent())
{
if (extent.minx < extent.maxx && extent.miny < extent.maxy)
{
if (map.getProjection() != "" && layer.getProjection() != "")
{
// need to reproject the extent
using (projectionObj oldProj = new projectionObj(layer.getProjection()))
{
using (projectionObj newProj = new projectionObj(map.getProjection()))
{
using (rectObj rect = new rectObj(extent.minx, extent.miny, extent.maxx, extent.maxy, 0))
{
rect.project(oldProj, newProj);
if (rect.minx < rect.maxx && rect.miny < rect.maxy)
map.setExtent(rect.minx, rect.miny, rect.maxx, rect.maxy);
if (target != null)
{
target.RaisePropertyChanged(this);
RaiseZoomChanged();
}
}
}
}
}
else
{
// don't reproject
map.setExtent(extent.minx, extent.miny, extent.maxx, extent.maxy);
if (target != null)
{
target.RaisePropertyChanged(this);
RaiseZoomChanged();
}
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}