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;

        }