如何使用 treeView 列出子目录中的文件而不显示根目录？答案

【问题标题】：How to use treeView to list the Files within sub Directories without showing the root directory?如何使用 treeView 列出子目录中的文件而不显示根目录？
【发布时间】：2014-02-09 18:25:45
【问题描述】：

这段代码运行良好：

    private void Form1_Load(object sender, EventArgs e)
    {
       PopulateTree(@"C:\treeview", treeView1.Nodes.Add("I want to remove this node"));
    }
    public void PopulateTree(string dir, TreeNode node)
    {
        DirectoryInfo directory = new DirectoryInfo(dir);
        foreach (DirectoryInfo d in directory.GetDirectories())
        {
            TreeNode t = new TreeNode(d.Name);
            PopulateTree(d.FullName, t);
            node.Nodes.Add(t);
        }
        foreach (FileInfo f in directory.GetFiles())
        {
            TreeNode t = new TreeNode(f.Name);
            node.Nodes.Add(t);
        }
    }

但是，我不想在子目录列表的顶部显示主（=root）目录（=folder），我只想显示如图所示的子目录。

【问题讨论】：

标签： c# winforms treeview

【解决方案1】：

试试这个：

public void PopulateTree(string dir, TreeNode node)
{
    DirectoryInfo directory = new DirectoryInfo(dir);
    foreach (DirectoryInfo d in directory.GetDirectories())
    {
        TreeNode t = new TreeNode(d.Name);
        if (node != null) node.Nodes.Add(t);
        else treeView1.Nodes.Add(t);
        PopulateTree(d.FullName, t);      
    }
    foreach (FileInfo f in directory.GetFiles())
    {
        TreeNode t = new TreeNode(f.Name);
        if (node != null) node.Nodes.Add(t);
        else treeView1.Nodes.Add(t);
    }
}

private void Form1_Load(object sender, EventArgs e)
{
    PopulateTree(@"C:\treeview", null);
}

【讨论】：

【解决方案2】：

  PopulateTree(@"C:\treeview", treeView1.Nodes);

public void PopulateTree(string dir, TreeNodeCollection nodes)
{
    DirectoryInfo directory = new DirectoryInfo(dir);
    foreach (DirectoryInfo d in directory.GetDirectories())
    {
        TreeNode t = new TreeNode(d.Name);
        nodes.Add(t);
        PopulateTree(d.FullName, t.Nodes);            
    }
    foreach (FileInfo f in directory.GetFiles())
    {
        TreeNode t = new TreeNode(f.Name);
        nodes.Add(t);
    }
}

【讨论】：