Enumerating through local file system drives (VB) : DriveInfo « File Directory « ASP.NET Tutorial
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<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
For Each drive As System.IO.DriveInfo In System.IO.DriveInfo.GetDrives()
Dim node As TreeNode = New TreeNode()
node.Value = drive.Name
If (drive.IsReady) Then
node.Text = drive.Name & _
" - (free space: " & drive.AvailableFreeSpace & ")"
Else
node.Text = drive.Name & " - (not ready)"
End If
Me.TreeView1.Nodes.Add(node)
Next
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td style="width: 100px" valign="top">
<asp:TreeView ID="TreeView1" runat="server"></asp:TreeView>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>