c# treeview选中节点（c#treeview查找子节点）

本文实例讲述了C#中TreeView实现适合两级节点的选中节点方法。分享给大家供大家参考。具体如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 class TreeViewChecked { bool isfirst = true; public TreeViewChecked(TreeView treeView) { treeView.AfterCheck += new TreeViewEventHandler(treeView_AfterCheck); treeView.AfterSelect += new TreeViewEventHandler(treeView_AfterSelect); } /// <summary> /// 点击文字，选中checkbox /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void treeView_AfterSelect(object sender, TreeViewEventArgs e) { if (e.Node.Checked) e.Node.Checked = false; else e.Node.Checked = true; if (isfirst) { isfirst = false; e.Node.TreeView.Nodes[0].Checked = false; } } /// <summary> /// 选中子节点，勾选父节点，选中父节点，勾选子节点 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void treeView_AfterCheck(object sender, TreeViewEventArgs e) { CheckTreeNode(e.Node); } /// <summary> /// 选中子节点，勾选父节点，选中父节点，勾选子节点 /// </summary> /// <param name="node"></param> private void CheckTreeNode(TreeNode node) { node.TreeView.AfterCheck -= new TreeViewEventHandler(treeView_AfterCheck); //如果不等于null,说明选择的是子节点 if (node.Parent != null) { TreeNode parent = node.Parent as TreeNode; //如果该节点是选中的 if (node.Checked) { //判断其父节点是否被选中，如果没有被选中则选中它 if (parent.Checked == false) { parent.Checked = true; } } else { bool ischecked = false; foreach (TreeNode child in parent.Nodes) { if (child.Checked) { ischecked = true; break; } } if (ischecked) parent.Checked = true; else parent.Checked = false; } }//如果等于null，说明选择的是根节点 else { foreach (TreeNode child in node.Nodes) { child.Checked = node.Checked; } } node.TreeView.AfterCheck += new TreeViewEventHandler(treeView_AfterCheck); } }