ASP.NET 根據 UserAgent 擷取瀏覽器的類型和版本

//using System.Text.RegularExpressions;public string GetBrowserName(string userAgent, out string browserName, out string ver){    string fullBrowserName = string.Empty;    browserName = string.Empty;    ver = string.Empty;    // IE    string regexStr = @"msie (?<ver>[\d.]+)";    Regex r = new Regex(regexStr, RegexOptions.IgnoreCase);    Match m = r.Match(userAgent);    if (m.Success)    {        browserName = "IE";        ver = m.Groups["ver"].Value;        fullBrowserName = string.Format("{0} {1}", browserName, ver);        return fullBrowserName;    }    // Firefox    regexStr = @"firefox\/([\d.]+)";    r = new Regex(regexStr, RegexOptions.IgnoreCase);    m = r.Match(userAgent);    if (m.Success)    {        browserName = "IE";        ver = m.Groups["ver"].Value;        fullBrowserName = string.Format("{0} {1}", browserName, ver);        return fullBrowserName;    }    // Chrome    regexStr = @"chrome\/([\d.]+)";    r = new Regex(regexStr, RegexOptions.IgnoreCase);    m = r.Match(userAgent);    if (m.Success)    {        browserName = "IE";        ver = m.Groups["ver"].Value;        fullBrowserName = string.Format("{0} {1}", browserName, ver);        return fullBrowserName;    }    // Opera    regexStr = @"opera.([\d.]+)";    r = new Regex(regexStr, RegexOptions.IgnoreCase);    m = r.Match(userAgent);    if (m.Success)    {        browserName = "IE";        ver = m.Groups["ver"].Value;        fullBrowserName = string.Format("{0} {1}", browserName, ver);        return fullBrowserName;    }    // Safari    regexStr = @"version\/([\d.]+).*safari";    r = new Regex(regexStr, RegexOptions.IgnoreCase);    m = r.Match(userAgent);    if (m.Success)    {        browserName = "IE";        ver = m.Groups["ver"].Value;        fullBrowserName = string.Format("{0} {1}", browserName, ver);        return fullBrowserName;    }    return fullBrowserName;}