This code sample shows, in C#, how to get all the files within a specific folder, and list them all, including the file size, in a Gridview control.
To access the FileSystem, you’ll need to import the System.IO namespace, and to use a DataTable, you must import the System.Data namespace:
using System.IO;
using System.Data;
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Web.UI" %>
<%@ Import Namespace="System.Web.UI.WebControls" %>
<%@ Import Namespace="System.IO" %>
<html>
<head>
<meta name="generator" Content="ASP Express 5.1">
<title>Untitled</title>
<script language="C#" Runat="server">
// declare the page level variable for the path
String FilePath;
protected void Page_Load(object sender, EventArgs e)
{
FilePath=Server.MapPath("~/Files");
GetFiles(); //call the GetFiles method
lblHeader.Text = "Files in " + FilePath;
}
private void GetFiles()
{
//Create the DataTable, with columns in which to add the file list
DataTable dt=new DataTable();
dt.Columns.Add("FileName",typeof(System.String));
dt.Columns.Add("Size",typeof(System.String));
DataRow dr=null;
DirectoryInfo dir=new DirectoryInfo(FilePath);
// Iterate through the datatable,
// adding file to a new row, along with the filesize to each row
foreach (FileInfo fi in dir.GetFiles())
{
dr=dt.NewRow();
dr[0] = fi.Name.ToString();
dr[1] = fi.Length.ToString("N0"); //'N0'formats the number with commas
dt.Rows.Add(dr);
}
// Bind DataTable to GridView - voila!
grdFiles.DataSource = dt;
grdFiles.DataBind();
}
</script>
</head>
<body>
<form id="form1" Runat="server">
<div style="text-align:center">
<asp:Label ID="lblHeader" runat="server"></asp:Label>
<asp:GridView ID="grdFiles" runat="server">
</asp:GridView>
</div>
</form>
</body>
</html>
