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Editorial Team
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Asked: 2026-05-12T05:38:29+00:00

The following headers work on IE but not on FF <%@ Page Language=C# ContentType=text/csv

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The following headers work on IE but not on FF

<%@ Page Language="C#" ContentType="text/csv" Inherits="System.Web.Mvc.ViewPage"%>
<% Response.AddHeader("Content-Disposition", "filename=report.csv;attachment"); %>

In FF the suggested name in FF appears as “report” without the extension.

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1 Answer

  1. Editorial Team

    I am currently using code that looks like this:

    response.AddHeader("Content-Disposition", "attachment; filename=\"data.csv\"");

    In my daily work – and that works just fine. Also are you sure this is not your OS or anything that has the “Hide extensions for known file types”-option enabled? (I know Windows have this option and it drives me crazy)

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