public JsonResult CreateValidateCode() { //首先实例化验证码的类 ValidateCodeHelper validateCode = new ValidateCodeHelper(); //生成验证码指定的长度 string code = validateCode.GetRandomString(4); //创建验证码的图片 var base64Str = validateCode.CreateImage(code); var token = Guid.NewGuid().ToString("N"); using (RedisClient redisClient = RedisHelper.CreateClient()) { redisClient.Set(token, code, TimeSpan.FromMinutes(5)); } return(Json(new { base64Str, token })); }