C#中遍歷TreeView並查找和選定節點

 

首先先看一段MSDN上的示例程序：打印一個樹中所有節點名稱
private void PrintRecursive(TreeNode treeNode)
2{
3    // Print the node.
4     System.Diagnostics.Debug.WriteLine(treeNode.Text);
5     MessageBox.Show(treeNode.Text);
6    // Print each node recursively.
7    foreach (TreeNode tn in treeNode.Nodes)
8    {
9         PrintRecursive(tn);
10     }
11}
12
13// Call the procedure using the TreeView.
14private void CallRecursive(TreeView treeView)
15{
16    // Print each node recursively.
17     TreeNodeCollection nodes = treeView.Nodes;
18    foreach (TreeNode n in nodes)
19    {
20         PrintRecursive(n);
21     }
22}

然後要說明的是一下TreeView類和TreeNode類之間的關係：TreeView類中有個只讀屬性是Nodes，它是屬於TreeNodeCollection類型的，而對於一個TreeView它的Nodes屬性就是返回treeView根結點的集合。

然後就是我的遞歸遍歷查找一個樹節點的方法（由於程序需要我是根據樹節點的ImageIndex屬性查找的）：

private TreeNode FindTreeNode(int imageIndex, TreeNode tnParent)
{
    if (tnParent == null)
        return null;
    if (tnParent.ImageIndex == imageIndex)
        return tnParent;
     TreeNode tnRet = null;
    foreach (TreeNode tn in tnParent.Nodes)
     {
         tnRet = FindTreeNode(imageIndex, tn);
        if (tnRet != null)
            break;
     }
    return tnRet;
}

private TreeNode CallFindNode(int imageIndex, TreeView treeView)
{
     TreeNodeCollection nodes = treeView.Nodes;
    foreach (TreeNode n in nodes)
     {
         TreeNode temp = FindTreeNode(imageIndex, n);
        if (temp != null)
            return temp;
     }
    return null;
}

/// <summary>
/// 這個是一個點擊事件，其中改變了選中節點，
/// 改變選中節點的同時就觸發了selectedNodeChanged事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void myControlTransactions_AddCustomer(object sender, EventArgs e)
{
     TreeNode temp = CallFindNode(3, treeView1);
    if (temp != null)
         treeView1.SelectedNode = temp;
}