Multiple File Upload.

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C#

ASP.NET

I got the following code of Multiple file upload from
http://www.asp.net/general/videos/how-do-i-multiple-file-uploads-in-aspnet-2[^].

But there is an error in the C# (ie. HttpPostedFile has not assigned properly).
Can anyone correct this. This will be very helpful for me.
//============================================================================

<form id="form1" runat="server" enctype="multipart/form-data">
<p id="upload-area">
   <input id="File1" type="file" runat="server" size="60" />
</p>

<input id="AddFile" type="button" value="Add file" onclick="addFileUploadBox()" />
<p><asp:Button ID="btnSubmit" runat="server" Text="Upload Now" OnClick="btnSubmit_Click" /></p>
<span id="Span1" runat="server" />

<script type="text/javascript">
function addFileUploadBox()
{
    if (!document.getElementById || !document.createElement)
        return false;

    var uploadArea = document.getElementById ("upload-area");

    if (!uploadArea)
        return;

    var newLine = document.createElement ("br");
    uploadArea.appendChild (newLine);

    var newUploadBox = document.createElement ("input");

    // Set up the new input for file uploads
    newUploadBox.type = "file";
    newUploadBox.size = "60";

    // The new box needs a name and an ID
    if (!addFileUploadBox.lastAssignedId)
        addFileUploadBox.lastAssignedId = 100;

    newUploadBox.setAttribute ("id", "dynamic" + addFileUploadBox.lastAssignedId);
    newUploadBox.setAttribute ("name", "dynamic:" + addFileUploadBox.lastAssignedId);
    uploadArea.appendChild (newUploadBox);
    addFileUploadBox.lastAssignedId++;
}
</script>
</form>

//==========================================================================

using System;
using System.IO;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        String UpPath;
        UpPath = "C:\\UploadedUserFiles";
        
        if (!Directory.Exists(UpPath))
        {
            Directory.CreateDirectory("C:\\UploadedUserFiles\\");
        }
    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        HttpFileCollection uploads = HttpContext.Current.Request.Files;
        for (int i = 0; i < uploads.Count; i++)
        {
            HttpPostedFile upload = file;// Here is the Error.....

            if (upload.ContentLength == 0)
                continue;

            string c = System.IO.Path.GetFileName(upload.FileName); // We don't need the path, just the name.

        try
            {
            upload.SaveAs("C:\\UploadedUserFiles\\" + c);
            Span1.InnerHtml = "Upload(s) Successful.";
            }
        catch(Exception Exp)
            {
                Span1.InnerHtml = "Upload(s) FAILED.";
            }
        }
    }
}