Using Treeview to display a directory structure
OK, I post the code directly with no unnecessary words:
Code<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack == false)
{
System.IO.DirectoryInfo RootDir = new System.IO.DirectoryInfo(Server.MapPath("~/"));
// output the directory into a node
TreeNode RootNode = OutputDirectory(RootDir, null);
// add the output to the tree
TreeView1.Nodes.Add(RootNode);
}
}
TreeNode OutputDirectory(System.IO.DirectoryInfo directory, TreeNode parentNode)
{
// validate param
if (directory == null) return null;
// create a node for this directory
TreeNode DirNode = new TreeNode(directory.Name);
// get subdirectories of the current directory
System.IO.DirectoryInfo[] SubDirectories = directory.GetDirectories();
// output each subdirectory
for (int DirectoryCount = 0; DirectoryCount < SubDirectories.Length; DirectoryCount++)
{
OutputDirectory(SubDirectories[DirectoryCount], DirNode);
}
// output the current directories files
System.IO.FileInfo[] Files = directory.GetFiles();
for (int FileCount = 0; FileCount < Files.Length; FileCount++)
{
DirNode.ChildNodes.Add(new TreeNode(Files[FileCount].Name));
}
// if the parent node is null, return this node
// otherwise add this node to the parent and return the parent
if (parentNode == null)
{
return DirNode;
}
else
{
parentNode.ChildNodes.Add(DirNode);
return parentNode;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Using Treeview to display a directory structure</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="TreeView1" runat="server">
</asp:TreeView>
</div>
</form>
</body>
</html>
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