c#+地图x 动态绘、改变图元位置 各位给看上 高分急求

c#+mapx 动态绘、改变图元位置 各位给看下 高分急求
              
               Dictionary<string,Feature> fts=new Dictionary<string,Feature>();
               if (fts[trans.id] != null)
                {

                    fts[trans.id].Point.Set(trans.log, trans.lat);
                    fts[trans.id].Update(fts[trans.id],Type.Missing);
                    m_objLayer.Refresh();
                  上边是关键  该怎么写

                }
               else
              { 
                Feature fea = axMap1.FeatureFactory.CreateSymbol(pt, sty);

                fts.Add(trans.id, fea);
                fts[trans.id]=m_objLayer.AddFeature(fts[trans.id], Type.Missing);
               }
[解决办法]
自己结了吧！！！