在 ASP.NET C# 中使用文件填充树视图

Question

我有一个树视图，我正在尝试用文件夹和文件填充它。树视图可以很好地填充文件夹，但不能填充文件。这是我的代码：

protected void Page_Load(object sender, EventArgs e)
        {

            if (!IsPostBack)
            {
                PopulateTree();
            }              

        }

private void PopulateTree()
        {
            //Populate the tree based on the subfolders of the specified VirtualImageRoot
            var rootFolder = new DirectoryInfo(VirtualImageRoot);
            var root = AddNodeAndDescendents(rootFolder, null);

            //Add the root to the TreeView
            TreeView1.Nodes.Add(root);
        }

private TreeNode AddNodeAndDescendents(DirectoryInfo folder, TreeNode parentNode)
        {
            //Add the TreeNode, displaying the folder's name and storing the full path to the folder as the value...
            string virtualFolderPath;

            if (parentNode == null)
            {
                virtualFolderPath = VirtualImageRoot;
            }
            else
            {
                virtualFolderPath = parentNode.Value + folder.Name + "/";
            }

            var node = new TreeNode(folder.Name, virtualFolderPath);

            //Recurse through this folder's subfolders
            var subFolders = folder.GetDirectories();

            foreach (DirectoryInfo subFolder in subFolders)
            {
                var child = AddNodeAndDescendents(subFolder, node);

                foreach (FileInfo file in subFolder.GetFiles())
                {

                    var index = file.FullName.LastIndexOf(@"\", StringComparison.Ordinal);
                    var strname = file.FullName.Substring(index + 1);
                    var name = strname.Split('.');

                    var tn = new TreeNode();
                    if (name.Length > 1 && name[1].ToLower() == "bch")
                    {
                        tn = new TreeNode(name[0], file.FullName);
                    }
                    else
                    {
                        tn = new TreeNode(name[0], file.FullName);
                    }
                    child.ChildNodes.Add(tn);
                }
                node.ChildNodes.Add(child);

            }
            //Return the new TreeNode
            return node;
        }

这是我的树的样子：

这是文件夹中文件的图片：

我只是尝试显示类型为 .bch 的文件以及树视图中的文件夹。有人可以告诉我我做错了什么吗？

Answer 1

问题是您的代码没有考虑文件夹层次结构的第一级：

private void PopulateTree()
{
    var rootFolder = new DirectoryInfo(@"C:\inetpub\wwwroot\yourwebproject");
    var root = AddNodeAndDescendents(rootFolder);
    TreeView1.Nodes.Add(root);
}

private TreeNode AddNodeAndDescendents(DirectoryInfo folder)
{        
    var node = new TreeNode(folder.Name, folder.Name);

    var subFolders = folder.GetDirectories();

    foreach (DirectoryInfo subFolder in subFolders)
    {
        var child = AddNodeAndDescendents(subFolder);
        node.ChildNodes.Add(child);
    }

    foreach (FileInfo file in folder.GetFiles("*.bch"))
    {
        var tn = new TreeNode(file.Name, file.FullName);
        node.ChildNodes.Add(tn);
    }
    return node;
}

Answer 2

Microsoft 构思并开发了 ASP.NET Web 框架。它用于创建网站、Web 应用程序和 Web 服务。它提供了 HTML、CSS 和 JavaScript 的出色集成。您可能已经意识到，.NET 是一个支持多种语言的庞大框架，C# 仅充当底层代码。 不关注反向链接