public static string GetSafeHtml(string val)        {            if (string.IsNullOrEmpty(val))            {                return string.Empty;            }            var v1 = Sanitizer.GetSafeHtmlFragment(val);//安全字符            var v2 = SanitizerCompatibleWithChineseCharacters(v1);//中文乱码            //Regex objRegEx=new Regex("<([^>]+)( [^>]+)>");<(?!img|a|\a)([^>]+)( [^>]+)>            Regex objRegEx = new Regex("<(?!img|a|\a|font)([^>]+)( [^>]+)>");//过滤HTML标签属性            Regex objRegEx2 = new Regex("<[^>^/]+>
     ]+>");//过滤空白HTML标签            var v3 = objRegEx.Replace(v2, "<$1>");            var v4 = objRegEx2.Replace(v3, "");            return v4;        }

　　PS: SanitizerCompatibleWithChineseCharacters 参见本博客.