public void Update( int id )
        {
            BlogSysCategory c = categoryService.GetById( id );
            if (c == null) {
                echoRedirect( lang( "exDataNotFound" ) );
                return;
            }

            c = validate( c );
            if (ctx.HasErrors) {
                run( Edit, id );
                return;
            }

            db.update( c );
            log( SiteLogString.UpdateBlogSysCategory(), c );

            echoToParentPart( lang( "opok" ) );
        }