/// <summary>
/// 正则匹配
/// </summary>
/// <param name="value"></param>
/// <param name="str"></param>
/// <param name="isMon"></param>
/// <param name="len"></param>
/// <returns></returns>
public static string GetRegex(this string value, string[] str, bool isMon = true, int len = 150)
{
string strValue = ToolHtml.GetRegexStrings(value, str, isMon);
return(Encoding.Default.GetByteCount(strValue) > len ? string.Empty : strValue);
}