public static MvcHtmlString GenerateMetaTag(this HtmlHelper helper, string keyword, string description, bool allowIndexPage, bool allowFollowLinks, string author = "", string lastModified = "", string expires = "never", string language = "fa", CacheControlType cacheControlType = CacheControlType.Private)
{
//const int maxLengthTitle = 60;
const int maxLengthDescription = 170;
//const string favIconPath = "~/cdn/ui/favicon.ico";
//title = title.Substring(0, title.Length <= maxLengthTitle ? title.Length : maxLengthTitle).Trim();
description = description.Substring(0, description.Length <= maxLengthDescription ? description.Length : maxLengthDescription).Trim();
var meta = "";
//meta += String.Format("<title>{0}</title>\n", title);
//meta += String.Format("<meta http-equiv=\"content-language\" content=\"{0}\"/>\n", language);
//meta += String.Format("<meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\"/>\n");
//meta += String.Format("<meta charset=\"utf-8\"/>\n");
meta += String.Format("<meta name=\"keyword\" content=\"{0}\"/>\n", keyword);
meta += String.Format("<meta name=\"description\" content=\"{0}\"/>\n", description);
meta += String.Format("<meta http-equiv=\"Cache-control\" content=\"{0}\"/>\n", cacheControlType.GetDescription());
meta += String.Format("<meta name=\"robots\" content=\"{0}, {1}\" />\n", allowIndexPage ? "index" : "noindex", allowFollowLinks ? "follow" : "nofollow");
meta += String.Format("<meta name=\"expires\" content=\"{0}\"/>\n", expires);
if (!String.IsNullOrEmpty(lastModified))
{
meta += String.Format("<meta name=\"last-modified\" content=\"{0}\"/>\n", lastModified);
}
if (!String.IsNullOrEmpty(author))
{
meta += String.Format("<meta name=\"author\" content=\"{0}\"/>\n", author);
}
//------------------------------------Google & Bing Doesn't Use Meta Keywords ...
//meta += string.Format("<meta name=\"keywords\" content=\"{0}\"/>\n", keywords);
return(new MvcHtmlString(meta));
}
