Winform TreeView 查找下一个节点

public static class TreeViewHelper { private static IEnumerable<TreeNode> childNodes(this TreeNode node) { return node.Nodes.Cast<TreeNode>() .SelectMany(x => x.selfAndChildNodes()); } private static IEnumerable<TreeNode> selfAndChildNodes(this TreeNode node) { return new List<TreeNode>() { node } .Union(node.Nodes.Cast<TreeNode>() .SelectMany(x => x.selfAndChildNodes())); } private static IEnumerable<TreeNode> nextNodes(this TreeView tree, TreeNode node) { bool after = false; if (node.Parent == null) return tree.Nodes.Cast<TreeNode>() .Select(x => { bool b = after = after || (node == x); return new { x, b }; }) .Where(x => x.b && x.x != node) .SelectMany(x => new List<TreeNode>() { x.x }.Union(x.x.childNodes())); else return node.Parent.Nodes.Cast<TreeNode>() .Select(x => { bool b = after = after || (node == x); return new { x, b }; }) .Where(x => x.b && x.x != node) .SelectMany(x => new List<TreeNode>() { x.x }.Union(x.x.childNodes())) .Union(tree.nextNodes(node.Parent)); } public static IEnumerable<TreeNode> NextNodes(this TreeView tree, TreeNode node) { if (tree == null || node == null) return new List<TreeNode>(); return node.childNodes().Union(tree.nextNodes(node)); } public static IEnumerable<TreeNode> NextNodes(this TreeView tree) { if (tree == null || tree.SelectedNode == null) return new List<TreeNode>(); return tree.NextNodes(tree.SelectedNode); } }

　　

　　如何调用：

var tn = _Tv.NextNodes().FirstOrDefault(x => Regex.IsMatch(x.Text, "(?i)" + txtKey.Text.Trim()));

if (tn == null)                

MessageBox.Show("查找完毕");            

else                

_Tv.SelectedNode = tn;

public static IEnumerable<TreeNode> TreeWhere(this TreeNodeCollection tds, Func<TreeNode, bool> Fun) { foreach (TreeNode item in tds) { if (Fun(item)) yield return item; var list = item.Nodes.TreeWhere(Fun); foreach (var item1 in list) yield return item1; } }

如何调用：

var tn = treeView1.Nodes.TreeWhere(x => Regex.IsMatch(x.Text, @"(?i)" + txtKey.Text.Trim()));

 

分类: C#,WinForm

Winform TreeView 查找下一个节点

，