Set user agent header with webrequest

Discussion in 'ASP .Net' started by Jon Spivey, Nov 20, 2004.

  1. Jon Spivey

    Jon Spivey Guest


    I'm using webrequest to scrape some urls, works fine, however one url seems
    to be throwing an error when it doesn't recognise the user agent. So I need
    to set the user agent to something like MSIE, I've tried these
    WebRequest.Headers.Set("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0;
    Windows NT 5.1;)")
    WebRequest.Headers.Add("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0;
    Windows NT 5.1;)")
    WebRequest.Headers.Item("User-Agent") = "Mozilla/4.0 (compatible; MSIE 6.0;
    Windows NT 5.1; )")
    and they all give the same error "System.ArgumentException: This header must
    be modified with the appropriate property"

    What's the correct way to set the User Agent header?

    Jon Spivey, Nov 20, 2004
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  2. Jon Spivey

    jongalloway Guest

    jongalloway, Nov 20, 2004
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  3. Jon Spivey


    Oct 1, 2009
    Likes Received:
    There's no WebRequest.UserAgent property, but there is a HttpWebRequest.UserAgent property. You can use:

    Code (Text):

    ((HttpWebRequest)request).UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)";
    Source: Search for "How to: Request Data Using the WebRequest Class" on MSDN (I can't post links as I'm new to this forum)
    tjrobinson, Oct 1, 2009
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