ASP.NET中使用TreeView显示文件的方法
编程学习 2021-07-04 22:40www.dzhlxh.cn编程入门
TreeView的使用很普遍，这篇文章主要介绍了ASP.NET中使用TreeView显示文件的方法,需要的朋友可以参考下
在ASP.NET中,TreeView的使用很普遍,把它利用上来
首先加入TreeView控件
<asp:TreeView ID="driverInfoView" runat="server" ImageSet="XPFileExplorer" OnTreeNodePopulate="driverInfoView_TreeNodePopulate"> </asp:TreeView>
当页面加载的时候,写下以下代码
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 + "(还没准备好)";
}
this.driverInfoView.Nodes.Add(newNode);
}
}
设置TreeView节点的事件
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);
}
}