How to use HasFile in AsyncFileUpload in asp.net ajax

AsyncFileUpload HasFile
UsingHasFile.aspx

<%@ Page Language="C#" AutoEventWireup="true" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

<!DOCTYPE html>

<script runat="server">
    protected void AsyncFileUpload1_UploadComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
    {
        if(AsyncFileUpload1.HasFile)
        {
            string filePath = Request.PhysicalApplicationPath + "Upload\\" + AsyncFileUpload1.PostedFile.FileName;
            AsyncFileUpload1.SaveAs(filePath);
        }
    }    
</script>

<script type="text/javascript">
    function showConfirmation(sender,args) {
        document.getElementById('Label1').innerText = 'upload complete: '+ args.get_fileName();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Ajax AsyncFileUpload HasFile - How to use HasFile in AsyncFileUpload</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:HotPink; font-style:italic;">Ajax AsyncFileUpload Example: How To Use HasFile</h2>
        <hr width="525" align="left" color="Pink" />
        <asp:ScriptManager 
            ID="ScriptManager1"
            runat="server"
            >
        </asp:ScriptManager>
        <br />
        <asp:Label 
            ID="Label1"
            runat="server"
            Font-Names="Comic Sans MS"
            ForeColor="DodgerBlue"
            Font-Size="X-Large"
            Font-Italic="false"
            Font-Bold="true"
            >
        </asp:Label>
        <br /><br />
        <cc1:AsyncFileUpload 
            ID="AsyncFileUpload1" 
            runat="server" 
            OnUploadedComplete="AsyncFileUpload1_UploadComplete"
            OnClientUploadComplete="showConfirmation"
            CompleteBackColor="PeachPuff"
            UploaderStyle="Traditional"
            BackColor="Peru"
            />
    </div>
    </form>
</body>
</html>
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