ASP.NET中使用TreeView顯示文件

在ASP.NET中,TreeView的使用很普遍,把它利用上來

首先加入TreeView控件

<asp:TreeView ID="driverInfoView" runat="server" ImageSet="XPFileExplorer" OnTreeNodePopulate="driverInfoView_TreeNodePopulate">
        
    </asp:TreeView>

 當頁面加載的時候,寫下以下代碼

protected void Page_Load(object sender, EventArgs e)
    {
        foreach (DriveInfo driverInfo in DriveInfo.GetDrives())
        {
            TreeNode newNode = new TreeNode();
            newNode.Expanded = false;
            newNode.PopulateOnDemand = true;
            newNode.Value = driverInfo.Name;

            if (driverInfo.IsReady)
            {
                newNode.Text = driverInfo.Name + "(" + driverInfo.VolumeLabel + ")";
            }
            else
            {
                newNode.Text = driverInfo.Name + "(還沒準備好)";
            }
            this.driverInfoView.Nodes.Add(newNode);
        }
    }

 設置TreeView節點的事件

protected void driverInfoView_TreeNodePopulate(object sender, TreeNodeEventArgs e)
    {
        DirectoryInfo dictInfo = new DirectoryInfo(e.Node.Value);

        foreach (DirectoryInfo directory in dictInfo.GetDirectories())
        {
            TreeNode newNode = new TreeNode();
            newNode.Expanded = false;
            newNode.PopulateOnDemand = true;
            newNode.Text = directory.Name;
            newNode.Value = directory.FullName;
            e.Node.ChildNodes.Add(newNode);
        }

        foreach (FileInfo fileInfo in dictInfo.GetFiles())
        {
            TreeNode newNode = new TreeNode();
            newNode.Text = fileInfo.Name;
            newNode.Value = fileInfo.FullName;
            e.Node.ChildNodes.Add(newNode);
        }
    }