• 要求不少于8位且至少包含字母及数字
string regexStr = "^(?![0-9]+$)(?![a-zA-Z]+$)(?!([^(0-9a-zA-Z)]|[\\(\\)])+$)([^(0-9a-zA-Z)]|[\\(\\)]|[a-zA-Z]|[0-9]){8,}$";
if (!System.Text.RegularExpressions.Regex.IsMatch(pwd, regexStr))
{
    return Json(new { ResultType = 0, Msg = "密码强度较弱,请修改后再次登录！" });                   
}