DataGridView多维表头的实现方法

         {
             int max = 0;
             foreach (HeaderItem item in _headerList)
                 if (item.EndY > max)
                     max = item.EndY;

             return max;
         }

         public List<HeaderItem> GetBaseHeaders()
         {
             List<HeaderItem> list = new List<HeaderItem>();
             foreach (HeaderItem item in _headerList)
                 if (item.IsBaseHeader) list.Add(item);
             return list;
         }

         public HeaderItem GetHeaderByLocation(int x, int y)
         {
             if (!_iniLock) InitHeader();
             HeaderItem result=null;
             List<HeaderItem> temp = new List<HeaderItem>();
             foreach (HeaderItem item in _headerList)
                 if (item.StartX <= x && item.EndX >= x)
                     temp.Add(item);
             foreach (HeaderItem item in temp)
                 if (item.StartY <= y && item.EndY >= y)
                     result = item;

             return result;
         }

         public IEnumerator GetHeaderEnumer()
         {
             return _headerList.GetEnumerator();
         }