Question

以下是我的代码

DirectoryInfo directoryInfo = new DirectoryInfo(@"C:\Users\Shahul\Documents\Visual Studio 2010\Projects\TreeView\TreeView\bin\FileExplorer");

private void Form1_Load(object sender, EventArgs e)
{
    if (Directory.Exists("FileExplorer"))
    {
        try
        {
            DirectoryInfo[] directories = directoryInfo.GetDirectories();

            foreach (FileInfo file in directoryInfo.GetFiles())
            {
                if (file.Exists)
                {
                    TreeNode nodes = treeView.Nodes[0].Nodes.Add(file.Name);
                }
            }

            if (directories.Length > 0)
            {
                foreach (DirectoryInfo directory in directories)
                {
                    TreeNode node = treeView.Nodes[0].Nodes.Add(directory.Name);
                    node.ImageIndex = node.SelectedImageIndex = 0;
                    foreach (FileInfo file in directory.GetFiles())
                    {
                        if (file.Exists)
                        {
                            TreeNode nodes = treeView.Nodes[0].Nodes[node.Index].Nodes.Add(file.Name);
                        }
                    }
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
}

当我跑步时，我只得到一张空白的树形图？无法弄清楚错误是什么？

这是我在Stack Overflow中的第一篇文章。

Answer 1

这应该可以解决你的问题，我试过WinForm：

public Form1()
    {
        InitializeComponent();

        DirectoryInfo directoryInfo = new DirectoryInfo(@"C:\Users\hikuma\Documents\IR");
        if (directoryInfo.Exists)
        {
            treeView1.AfterSelect += treeView1_AfterSelect;
            BuildTree(directoryInfo, treeView1.Nodes);
        }
    }

    private void BuildTree(DirectoryInfo directoryInfo, TreeNodeCollection addInMe)
    {
        TreeNode curNode = addInMe.Add(directoryInfo.Name);

        foreach (FileInfo file in directoryInfo.GetFiles())
        {
            curNode.Nodes.Add(file.FullName, file.Name);
        }
        foreach (DirectoryInfo subdir in directoryInfo.GetDirectories())
        {
            BuildTree(subdir, curNode.Nodes);
        }
    }

    private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
    {
        if(e.Node.Name.EndsWith("txt"))
        {
            this.richTextBox1.Clear();
            StreamReader reader = new StreamReader(e.Node.Name);
            this.richTextBox1.Text = reader.ReadToEnd();
            reader.Close();
        }
    }

这是一个如何在富文本框中打开文件的简单示例，它可以得到很多改进:)。如果它有帮助，您可能想要标记为答案或投票:) !!

Answer 2

试试这个:(注意确保你的directoryInfo位置包含一些文件夹）

DirectoryInfo directoryInfo = new DirectoryInfo(@"C:\Users\Shahul\Documents\Visual Studio 2010\Projects\TreeView\TreeView\bin\FileExplorer");

private void Form1_Load(object sender, EventArgs e)
{
    if (directoryInfo.Exists)
    {
        try
        {
            treeView.Nodes.Add(directoryInfo.Name);
            DirectoryInfo[] directories = directoryInfo.GetDirectories();

            foreach (FileInfo file in directoryInfo.GetFiles())
            {
                if (file.Exists)
                {
                    TreeNode nodes = treeView.Nodes[0].Nodes.Add(file.Name);
                }
            }


            if (directories.Length > 0)
            {
                foreach (DirectoryInfo directory in directories)
                {
                    TreeNode node = treeView.Nodes[0].Nodes.Add(directory.Name);
                    node.ImageIndex = node.SelectedImageIndex = 0;
                    foreach (FileInfo file in directory.GetFiles())
                    {
                        if (file.Exists)
                        {
                            TreeNode nodes = treeView.Nodes[0].Nodes[node.Index].Nodes.Add(file.Name);
                        }
                    }
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
}

Answer 3

DirectoryInfo.Exists（“FileExplorer”）将检查“C：\ Users \ Shahul \ Documents \ Visual Studio 2010 \ Projects \ TreeView \ TreeView \ bin \ debug \ FileExplorer”，而不是“C：\ Users \ Shahul \”在调试模式下运行时，Documents \ Visual Studio 2010 \ Projects \ TreeView \ TreeView \ bin \ FileExplorer“。

Answer 4

尝试以下方法：

private void Form1_Load(object sender, EventArgs e)
    {
        if (directoryInfo.Exists)
        {
            try
            {
                treeView.Nodes.Add(LoadDirectory(directoryInfo));                    
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }

    private TreeNode LoadDirectory(DirectoryInfo di)
    {
        if (!di.Exists)
            return null;

        TreeNode output = new TreeNode(di.Name, 0, 0);

        foreach (var subDir in di.GetDirectories())
        {
            try
            {
                output.Nodes.Add(LoadDirectory(subDir));
            }
            catch (IOException ex)
            {
                //handle error
            }
            catch { }
        }

        foreach (var file in di.GetFiles())
        {
            if (file.Exists)
            {
                output.Nodes.Add(file.Name);
            }
        }

        return output;
    }
}

最好将目录解析拆分为递归方法，以便您可以一直走到树下。

这会阻止用户界面，直到它被完全加载 - 但修复它超出了这个答案的范围......

：）

如何在TreeView中显示目录？

4 个答案: