WinForm TreeView杂记

1 控件的全选与反选
private void AfterCheckNode(object sender, TreeViewEventArgs e)

{

if (e.Action != TreeViewAction.Unknown)

{

CheckAllChildNodes(e.Node, e.Node.Checked);

bool bol = true;

if (e.Node.Parent != null)

{

for (int i = 0; i < e.Node.Parent.Nodes.Count; i++)

{

if (!e.Node.Parent.Nodes[i].Checked)

bol = false;

}

e.Node.Parent.Checked = bol;

}

}

}

private void CheckAllChildNodes(TreeNode treeNode, bool nodeChecked)

{

foreach (TreeNode node in treeNode.Nodes)

{

node.Checked = nodeChecked;

if (node.Nodes.Count > 0)

{

this.CheckAllChildNodes(node, nodeChecked);

}

}

}
2获取当前选中结点的下级结点数目：

private void treeView_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)

{

if (e.Node.Nodes.Count == 0)

{

MessageBox.Show("0");

}

else

{

MessageBox.Show(e.Node.Nodes.Count.ToString());

}

｝