C# TreeView 节点查找

主窗体部分代码
/// <summary>
/// 遍历树节点，并将节点存入List<TreeNode>集合中
/// </summary>
/// <param name="node"></param>
/// <param name="nodeList"></param>
public void GetAllNodes(TreeNodeCollection nodeCollection, List<TreeNode> nodeList)
{
foreach (TreeNode itemNode in nodeCollection)
{
nodeList.Add(itemNode);
GetAllNodes(itemNode.Nodes, nodeList);
}
}
/// <summary>
/// 查找
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnFolder_Click(object sender, EventArgs e)
{
if (this.OwnedForms.Length > 0)
{
this.OwnedForms[0].Close(); //如果查询窗体已打开，则关闭已打开的窗口
}
TreeViewQuery frm = new TreeViewQuery(this);
frm.ShowInTaskbar = false;
frm.Show(this);
}

查找窗体代码

private FolderFrom parentFrm;
private string lastFindString; //记录上一次查找的文本
private int lastFindCount; //记录上一次查找的标记
private List<TreeNode> nodeList = new List<TreeNode>(); //记录所有的树节点
public TreeNode node = null; //记录查找到的节点
private bool IsUp = false; //是否向上查找
public TreeViewQuery ()
{
InitializeComponent();
}
public TreeViewQuery (FolderFrom frm)
{
InitializeComponent();
parentFrm = frm;
}
#region Methods
/// <summary>
/// 模糊匹配(向下查找)
/// </summary>
/// <param name="inputText"></param>
/// <returns></returns>
private int FindNodePartDown(string inputText, int startCount)
{
nodeList.Clear();
parentFrm.GetAllNodes(parentFrm.tvFolder.Nodes, nodeList);
for (int i = startCount; i < nodeList.Count; i++)
{
if (nodeList[i].Text.Contains(inputText))
{
return i;
}
}

return -1;
}

/// <summary>
/// 模糊匹配(向上查找)
/// </summary>
/// <param name="inputText"></param>
/// <returns></returns>
private int FindNodePartUp(string inputText, int startCount)
{
nodeList.Clear();
parentFrm.GetAllNodes(parentFrm.tvFolder.Nodes, nodeList);
if (startCount == 0)
{
startCount = nodeList.Count - 1;
}
//for (int i = nodeList.Count - 1; i > startCount; i--)
for (int i = startCount; i >= 0; i--)
{
if (nodeList[i].Text.Contains(inputText))
{
return i;
}
}

return -2;
}
/// <summary>
/// 全字匹配查找(向下查找)
/// </summary>
/// <param name="inputText">查找的内容</param>
/// <param name="startCount">起始位置</param>
/// <returns></returns>
private int FindNodeAllDown(string inputText, int startCount)
{
nodeList.Clear();
//List<TreeNode> nodeList = new List<TreeNode>();
parentFrm.GetAllNodes(parentFrm.tvFolder.Nodes, nodeList);
for (int i = startCount; i < nodeList.Count; i++)
{
if (nodeList[i].Text.CompareTo(inputText) == 0)
{
return i;
}
}
return -1;
}
/// <summary>
/// 全字匹配查找(向上查找)
/// </summary>
/// <param name="inputText">查找的内容</param>
/// <param name="startCount">起始位置</param>
/// <returns></returns>
private int FindNodeAllUp(string inputText, int startCount)
{
nodeList.Clear();
//List<TreeNode> nodeList = new List<TreeNode>();
parentFrm.GetAllNodes(parentFrm.tvFolder.Nodes, nodeList);
for (int i = nodeList.Count - 1; i > startCount; i--)
{
if (nodeList[i].Text.CompareTo(inputText) == 0)
{
return i;
}
}
return -1;
}
#endregion
#region Events
/// <summary>
/// 取消
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnClose_Click(object sender, EventArgs e)
{
this.Close();
this.Dispose();
}
/// <summary>
/// 窗体加载
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TreeViewQuery_Load(object sender, EventArgs e)
{
this.Icon = new System.Drawing.Icon(AppDomain.CurrentDomain.BaseDirectory + @"Logo/Logo.ico");
}

/// <summary>
/// 当文本框不为空时启用查找按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void txtInputText_TextChanged(object sender, EventArgs e)
{
if (txtInputText.Text.Trim() == "")
{
btnQueryNext.Enabled = false;
}
else
{
btnQueryNext.Enabled = true;
}
}

/// <summary>
/// 查找下一个
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnQueryNext_Click(object sender, EventArgs e)
{
string inputText = txtInputText.Text.ToString(); //输入框的值
if (checkWord.Checked == true) //判断是否全字匹配
{
if (rbtnUp.Checked == true)
{
if (inputText.CompareTo(lastFindString) != 0 || (!IsUp)) //判断是否与上一次的查询文本相同
{
lastFindCount = FindNodeAllUp(inputText, 0); //不同则重新查找
lastFindString = inputText;
}
else
{
lastFindCount = FindNodeAllUp(inputText, lastFindCount - 1); //相同则从下一个节点开始查找
lastFindString = inputText;
}
IsUp = true;
}
else
{
if (inputText.CompareTo(lastFindString) != 0 || (IsUp)) //判断是否与上一次的查询文本相同
{
lastFindCount = FindNodeAllDown(inputText, 0); //不同则重新查找
lastFindString = inputText;
}
else
{
lastFindCount = FindNodeAllDown(inputText, lastFindCount + 1); //相同则从下一个节点开始查找
lastFindString = inputText;
}
IsUp = false;
}
}
else
{
if (rbtnUp.Checked == true)
{
if (inputText.CompareTo(lastFindString) != 0 || (!IsUp))
{
lastFindCount = FindNodePartUp(inputText, 0);
lastFindString = inputText;
}
else
{
lastFindCount = FindNodePartUp(inputText, lastFindCount - 1);
lastFindString = inputText;
}
IsUp = true;
}
else
{
if (inputText.CompareTo(lastFindString) != 0 || (IsUp))
{
lastFindCount = FindNodePartDown(inputText, 0);
lastFindString = inputText;
}
else
{
lastFindCount = FindNodePartDown(inputText, lastFindCount + 1);
lastFindString = inputText;
}
IsUp = false;
}
}
if (lastFindCount == -1) //判断是否找到节点
{
MessageBox.Show( "查找到尾部，未找到指定的节点！");
this.Focus();
lastFindCount = 0;
lastFindString = "";
return;
}
else if (lastFindCount == -2) //判断是否找到节点
{
essageBox.Show("查找到顶部，未找到指定的节点！");
this.Focus();
lastFindCount = 0;
lastFindString = "";
return;
}
node = nodeList[lastFindCount];
parentFrm.tvFolder.SelectedNode = node; //选中查找到的节点
parentFrm.tvFolder.Focus();
}