今天因为菜单的问题, 需要用到递归算法, 在此记录一下:
1.表结构如下:(这里只是展示两个比较重要的字段) ,大家应该都看明白
2.先定义一个菜单结构类.
3.实现递归.
private List TreeChildViewModel AddChildN(string Pid) var data = _perssionRepsonsityService.GetAllList().Where(x = x.ParentID == Pid);//这里是获取数据 List TreeChildViewModel list = new List TreeChildViewModel (); foreach (var item in data) {
//这一块主要是转换成TreeChidViewModel的值. TreeChildViewModel childViewModel = new TreeChildViewModel(); childViewModel.id = item.ID; childViewModel.component = item.Component; childViewModel.name = item.Name; childViewModel.meta_icon = item.Meta_icon; childViewModel.meta_title = item.Meta_title; childViewModel.meta_content = item.Meta_content; childViewModel.treeChildren = GetChildList(childViewModel); list.Add(childViewModel); return list; public List TreeChildViewModel GetChildList(TreeChildViewModel treeChildView) if (!_perssionRepsonsityService.IsExists(x = x.ParentID == treeChildView.id)) return null; else return AddChildN(treeChildView.id); }
4.调用
public string Client() List TreeChildViewModel treeViewModels = new List TreeChildViewModel (); treeViewModels= AddChildN("0"); return JsonConvert.SerializeObject(treeViewModels); }5.结果展示
[ "id":"1", "pathRouter":null, "name":"用户管理", "component":"123123", "meta_title":null, "meta_content":null, "meta_icon":null, "treeChildren":[ "id":"2", "pathRouter":null, "name":"table", "component":"123123", "meta_title":null, "meta_content":null, "meta_icon":null, "treeChildren":[ "id":"5", "pathRouter":null, "name":"table", "component":"123123", "meta_title":null, "meta_content":null, "meta_icon":null, "treeChildren":null "id":"3", "pathRouter":null, "name":"table", "component":"123123", "meta_title":null, "meta_content":null, "meta_icon":null, "treeChildren":[ "id":"4", "pathRouter":null, "name":"table", "component":"123123", "meta_title":null, "meta_content":null, "meta_icon":null, "treeChildren":null "id":"6", "pathRouter":null, "name":"table", "component":"123123", "meta_title":null, "meta_content":null, "meta_icon":null, "treeChildren":null]
6.这里是全部菜单获取的, 如果是根据角色来判断权限获取的话, 在AddChildN 的foreach 里面进行权限进行过滤, 如果该角色ID下的权限包含有相应的权限ID,则执行,否则,直接跳出循环. ,但是这最终还得根据实际表结构来进行过滤.
7.总结, 其实我这差不多是误打误撞写出来的,算做个记录吧..