/// <summary>
/// Updates the template for the specified document.
/// </summary>
/// <param name="docId">The ID of the document.</param>
/// <param name="templateId">The template to update the document with.</param>
/// <param name="deep">Whether to update all the document's children with this template.</param>
[WebMethod]
public void UpdateDocumentTemplate ( int docId, int templateId, bool deep )
{
    if ( deep )
    {
        ArrayList list = this.GetDocumentChildren( docId );
        for ( int i = 0; i < list.Count; i++ )
        {
            Document d = new Document( (int) list[i] );
            d.Template = templateId;
            d.Publish( new User( 0 ) );
        }
    }
    else
    {
        Document d = new Document( docId );
        d.Template = templateId;
        d.Publish( new User( 0 ) );
    }   
}

private ArrayList GetDocumentChildren ( int docId )
{
    Document doc = new Document( docId );
    Document[] children = doc.Children;
    ArrayList list = new ArrayList();

    if ( children.Length > 0 )
    {
        for ( int i = 0; i < children.Length; i++ )
        {
            if ( children[i].HasChildren )
            {
                list.AddRange( GetDocumentChildren( children[i].Id ) );
            }

            list.Add( children[i] );
        }
    }

    return list;
}