Winform TreeView to find the next node

Reprint: http://www.cnblogs.com/Ruiky/archive/2013/02/01/2888674.html

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 to 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 (t REE = = 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); }    }

　　

How to Invoke:

var tn = _tv.nextnodes (). FirstOrDefault (x = Regex.IsMatch (X.text, "(? i)" + TxtKey.Text.Trim ()));

if (tn = = NULL)

MessageBox.Show ("Find complete");

Else

_tv.selectednode = TN;

public static ienumerable<treenode> Treewhere (this treenodecollection TDs, Func<treenode, bool> fun)        {            foreach (TreeNode item in TDS)            {                if (item)                    yield return item;                var list = Item. Nodes.treewhere (fun);                foreach (var item1 in list)                    yield return item1;            }        }

How to Invoke:

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

Category: C#,winform

Winform TreeView to find the next node