arcengine开发实现编辑工具条中的编辑任务实现开始、保存、结束编辑，移动、删除要素，裁剪面、分割线、编辑属性等功能-Arcengine development to achieve editing tools to achieve the editorial task to start, save, end editing, moving, delete features, cut the surface, split line, edit attributes and other fun