ASP.NET中使用TreeView显示文件的方法

前端技术 2023/09/05 .NET

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); 
}
}

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