c#treeview自动定位选中

/// <summary>
/// 设置TreeView选中节点
/// </summary>
/// <param name="treeView"></param>
/// <param name="selectStr">选中节点文本</param>
private void SelectTreeView(TreeView treeView, string selectStr)
{
    treeView.Focus();
    for (int i = 0; i < treeView.Nodes.Count; i++)
    {
        for (int j = 0; j < treeView.Nodes[i].Nodes.Count; j++)
        {
            if (treeView.Nodes[i].Nodes[j].Text == selectStr)
            {
                treeView1.SelectedNode = treeView.Nodes[i].Nodes[j];//选中
                //treeView.Nodes[i].Nodes[j].Checked = true;
                treeView.Nodes[i].Expand();//展开父级
                return;
            }
        }
    }
}