选中TreeView的某节点，并加背景颜色

private void button2_Click(object sender, EventArgs e)
{ foreach (TreeNode n in TreeView1.Nodes)
{
ErgodicTreeView(n);
}
}

void ErgodicTreeView(TreeNode tn)
{
if (tn == null) return;
//查找到某节点时
if (tn.Text.Equals("英山县"))
{
//遍历递归获取父节点，将父节点全部展开
prenode(tn);
//选中某节点，并加背景颜色
TreeView1.SelectedNode = tn;
TreeView1.SelectedNode.BackColor = System.Drawing.Color.Red;
}
foreach (TreeNode n in tn.Nodes)
{
ErgodicTreeView(n);
}
}
void prenode(TreeNode m)
{ if (m.Parent.Text != null)
{
m.Parent.Expand();
//当为项级节点时
if (m.Parent.Level == )
{
m.Parent.Expand();
}
//不是项级节点时
else
{
prenode(m.Parent);
} } }