C# winform treeView checkbox全选反选

private void treeView2_AfterCheck(object sender, TreeViewEventArgs e)
{
if (e.Action != TreeViewAction.Unknown)
{
CheckAllChildNodes(e.Node, e.Node.Checked);
//选中父节点
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;
}
}
}
#region 选中子节点
public void CheckAllChildNodes(TreeNode treeNode, bool nodeChecked)
{
foreach (TreeNode node in treeNode.Nodes)
{
node.Checked = nodeChecked;
if (node.Nodes.Count > 0)
{
this.CheckAllChildNodes(node, nodeChecked);
}
}
}
#endregion