Unable to download the .7z extension file through application

Question

Am trying to download the .7z file using our website application.But it shows the below error.

HTTP Error 404.3 - Not Found The page you are requesting cannot be served because of the extension configuration. If the page is a script, add a handler. If the file should be downloaded, add a MIME map can anyone suggest me how can I resolve this issue?

Thanks in advance. Regards, Nithya G

Answer 1

You need to set the MIME type on the server:

application/x-7z-compressed

How to set MIME Types on IIS: http://www.iis.net/configreference/system.webserver/staticcontent/mimemap

Answer 2

Here is an example using a button:

<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />

code behind:

protected void Button1_Click(object sender, EventArgs e)
{
    Response.ContentType = "APPLICATION/OCTET-STREAM";
    String Header = "Attachment; Filename=x.7z";
    Response.AppendHeader("Content-Disposition", Header);
    System.IO.FileInfo Dfile = new System.IO.FileInfo(Server.MapPath("~/x.7z"));
    Response.WriteFile(Dfile.FullName);
    //Don't forget to add the following line
    Response.End();

}

In IIS you may want to set the MIME type as so: