/// <summary>
/// Updates the selection from page parameters.
/// </summary>
/// <param name="selection">The selection.</param>
/// <param name="rockBlock">The rock block.</param>
/// <returns></returns>
public string UpdateSelectionFromPageParameters( string selection, Rock.Web.UI.RockBlock rockBlock )
{
if ( !string.IsNullOrWhiteSpace( selection ) )
{
string[] selectionValues = selection.Split( '|' );
if ( selectionValues.Length >= 1 )
{
var campusId = rockBlock.PageParameter( "CampusId" ).AsIntegerOrNull();
if ( campusId == null )
{
var campusEntity = rockBlock.ContextEntity<Campus>();
if ( campusEntity != null )
{
campusId = campusEntity.Id;
}
}
if ( campusId.HasValue )
{
var selectedCampus = CampusCache.Read( campusId.Value );
if ( selectedCampus != null )
{
selectionValues[0] = selectedCampus.Guid.ToString();
return selectionValues.ToList().AsDelimited( "|" );
}
}
}
}
return selection;
}