树型递归

[本人QQ-554433626]

头现在有点闷，求个代码块！
需求如下：
现有树型List<Tree> tree

    public class Tree
    {
        public string id { get; set; }

        public string text { get; set; }

        public List<Tree> children { get; set; }
    }

我目前有组想展示的树ID List<string> treeIds
treeIds[0]的值对应只展示 tree = tree.FirstOrDefault(t=>t.id.Equals(treeIds[0]))
treeIds[1]的值对应只展示 tree[0].children = tree[0].children.FirstOrDefault(t=>t.id.Equals(treeIds[1]))
treeIds[2]的值对应只展示 tree[0].children[0].children= tree[0].children[0].children.FirstOrDefault(t=>t.id.Equals(treeIds[2]))

不知道对没对，解释意思应该就是：treeIds的顺序一一对应树型每个等级只展示的节点

得出筛选后的List<Tree> tree

[好奇都是要学的]

this.ViewState["ds"] = ds; 绑定数据源 AddTree("", (TreeNode)null); 开始递归 public void AddTree(string ParentNO, TreeNode pNode) { DataSet ds = (DataSet)this.ViewState["ds"]; DataView dvTree = new DataView(ds.Tables[0]); //过滤ParentNO,得到当前的所有子节点 dvTree.RowFilter = "ParentNo ='" + ParentNO + "'"; foreach (DataRowView Row in dvTree) { TreeNode Node1 = new TreeNode(); if (pNode == null) { //添加根节点 Node1.Text = Row["DeptName"].ToString(); TvwCatalog.Nodes.Add(Node1); Node1.Expanded = true; Node1.NavigateUrl = "ShopProductList.aspx?DeptNo=" + Row["DeptNo"].ToString(); AddTree(Row["DeptNo"].ToString(), Node1); //再次递归 } else { //̀添加当前节点的子节点 Node1.Text = Row["DeptName"].ToString(); pNode.ChildNodes.Add(Node1); Node1.Expanded = true; Node1.NavigateUrl = "ShopProductList.aspx?DeptNo=" + Row["DeptNo"].ToString(); AddTree(Row["DeptNo"].ToString(), Node1); //再次递归 } } } 这就是递归树了， 你改改 就可以用了

[正怒月神]

https://blog.csdn.net/hanjun0612/article/details/50563136