TreeView 循环遍历选中的value

  private void GetAllNodeText()
    {
        foreach (TreeNode tn in _treeView1.Nodes)
        {
            if (tn.Checked == false)
            {
                if (string.IsNullOrEmpty(_operCode))
                {
                    _operCode += tn.Value;
                }
                else
                {
                    _operCode += "," + tn.Value;
                }

            }
            if (tn.ChildNodes.Count > 0)
            {
                foreach (TreeNode tn1 in tn.ChildNodes)
                {
                    if (tn1.Checked == false)
                    {
                        if (string.IsNullOrEmpty(_operCode))
                        {
                            _operCode += tn1.Value;
                        }
                        else
                        {
                            _operCode += "," + tn1.Value;
                        }
                    }

                }
            }

        }
    }
 
 
 _operCode 就是接收的选中的值 
 
 
2------------------将值赋给Treeview  

代码
 foreach (TreeNode tn in _treeView1.Nodes)
                        {
                            for (int j = 0; j < strurl.Length; j++)
                            {
                                if (tn.Value == strurl[j])
                                {
                                    tn.Checked = false;
                                }
                                foreach (TreeNode tn1 in tn.ChildNodes)
                                {
                                    if (tn1.Value == strurl[j])
                                    {
                                        tn1.Checked = false;
                                    }
                                }
                            }
                        }
 
//我存储的是规律的是  不选中的值存储在数据库 所以在我取出数据的时候 我先让我的Treeview 全部选中 然后将与数据库等同的值不选中 所以我tn.Checked = false;