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Editorial Team
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Asked: 2026-06-03T21:54:13+00:00

I’m developing a site that has a few files on it that I only

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I’m developing a site that has a few files on it that I only want to be downloadable if the users have sufficient access on my terms.

Basically, I have a page that has a download link on, but the download link will only be displayed and activated if the user has the correct roles and are associated with the correct properties in my database.

The problem I am facing is that I don’t want users to be able to access the file directly, for example if they go to http://www.mysite.com/downloads/myfile.pdf – I don’t want them to be able to get hold of the file although I do want to be able to allow them to download it once they have logged in and I have checked that they fulfil my custom rules and regulations.

I was going to do it like so, but I believe with the permissions deactivated I won’t be able to do so.

System.IO.FileInfo file = new System.IO.FileInfo(path);
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(file.FullName);
Response.End();

Is it possible to achieve my aims? Hopefully I’ve explained myself sufficiently.

Thanks

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1 Answer

  1. Editorial Team

    I am sure you at the correct way.

    Here is a simple example:

    Response.ContentType = "text/txt";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + "file.txt");
Response.Write(file.ToString());
Response.End();

    —- EDIT —-
    There are others good samples:

    http://www.dotnetscraps.com/dotnetscraps/post/4-ways-to-send-a-PDF-file-to-the-IE-Client-in-ASPNET-20.aspx

    <%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.ContentType = "application/pdf";
        Response.Clear();
        Response.TransmitFile("UML.pdf");
        Response.End();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Way 1</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Send PDF" /><br />
        <br />
        This page will refresh itself with a PDF file opened in the same instance of IE itself. 
        Users will not get prompted to Save/Open/Cancel the PDF file.</div>
    </form>
</body>
</html>
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