How to Resolve this errorr "htmlfile: Access is denied"...?

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I have this ASPX page..

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <style type="text/css">
        .FileSelect
        {
            background-image: url('../Images/Camera.png');
            width: 120px;
            height: 90px;
        }
    </style>
    <script type="text/javascript">
        function SelectFile() {
            document.getElementById('<%= imageUpload.ClientID %>').click();
        }
        function SubmitForm() {
            __doPostBack('btnSubmit', '');
        }
        function __doPostBack(eventtarget, eventargument) {
            document.form1.__EVENTTARGET.value = eventtarget;
            document.form1.__EVENTARGUMENT.value = eventargument;
            document.form1.submit();
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">    
        <input type="hidden" id="__EVENTTARGET" value="" />
        <input type="hidden" id="__EVENTARGUMENT" value="" />
        <input type="button" runat="server" id="btnFileSelect" value="" class="FileSelect" onclick="SelectFile();"/> 
        <asp:FileUpload ID="imageUpload" runat="server" style="display:none;" onchange="SubmitForm()" />
        <asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" style="display:none;" />    
    </form>
</body>
</html>

and in my code behind page like this..

C#

protected void Page_Load(object sender, EventArgs e)
       {
       }
       protected void btnSubmit_Click(object sender, EventArgs e)
       {

       }

when __doPostBack is Called at that time the line

JavaScript

document.form1.submit();

will give me this error

"htmlfile: Access is denied"

how to resolve this...

Posted 13-Oct-11 8:48am

Tejas Vaishnav

Updated 13-Oct-11 10:50am

Monjurul Habib

v3

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E.F. Nijboer · Answer 1 · 2011-10-13T09:21:00

You cannot call the click() method from javascript of a FileUpload control. It also isn't possible to set or clear the value using javascript. It is considered a security violation. You could however read the value to check the file extension for example.

Some extra info:
http://codecorner.galanter.net/2009/03/10/fileupload-and-htmlfile-access-is-denied-error/[^]

http://jonesie.net.nz/htmlFileAccessDeniedADefenceForMurder.aspx[^]

Good luck!