C#校验时间格式的场景分析

[HttpPost]
public async Task<IActionResult> TestSendOrder([FromBody] ReceiveOrderRequest request)
{
    var secret_key = _options.Value.SecreTKEy;
    var url = _options.Value.Host;
    //1.将模型转成JSON格式字符串
    var param = jsonConvert.SerializeObject(request);
    //2.将json格式字符串,序列化成有序字典
    SortedDictionary<string, string> dict = JsonConvert.DeserializeObject<SortedDictionary<string, string>>(param);
    //3.循环字典,按规则拼接成待加密的明文字符串
    var data = "";
    foreach (var item in dict)
    {
        if (item.Key == "sign") continue;
        data += $"{item.Key}={item.Value}&";
    }
    data += $"secret_key={secret_key}";
    //4.生成签名
    var sign = EncryptHelper.SHA1Encryption(data);
    request.sign = sign;
    //5.模拟订单推送
    var res = await _httpClientHelper.PostData(url, JsonConvert.SerializeObject(request));
    return Ok(res);
}

 1. DateTime格式不一致
    如: DateTime dt = "2022-07-30 12:26:56"
    序列化后 dt=2022-07-30T12:26:56
    2. decimal小数点后自动补0
    如: decimal price = 10
    序列化后 price=10.0

var iso = new IsoDateTimeConverter();
iso.DateTimeFORMat = "yyyy-MM-dd HH:mm:ss";
var param = JsonConvert.SerializeObject(request, iso);

public string GetFmortDateTime(string strDate) 
{
    DateTime dt;
    if (DateTime.TryParse(strDate, out dt))
    {
        return dt.ToString("yyyy-MM-dd HH:mm:ss");
    }
    else
    {
        return strDate;
    }
}   

public static async Task<bool> CheckSign(dynamic request, string secret)
{
    SortedDictionary<string, string> dict = new SortedDictionary<string, string>();
    foreach (PropertyInfo p in request.GetType().GetProperties())
    {
        var value = p.GetValue(request);
        if (value == null)
        {
            dict[p.Name] = "";
        }
        else
        {
            var valueType = value.GetType();
            if (valueType.Name == "DateTime") 
            {
                dict[p.Name] = Convert.ToDateTime(value).ToString("yyyy-MM-dd HH:mm:ss");
            }
            else 
            {
                dict[p.Name] = value.ToString();
            }
        }
    }
    var sign = dict["sign"];
    dict.Remove("sign");
    var data = "";
    foreach (var item in dict)
    {
        data += $"{item.Key}={item.Value}&";
    }
    data += $"secret_key={secret}";
    var new_sign = EncryptHelper.SHA1Encryption(data);
    return new_sign.ToLower() == sign.ToLower();
}

public static string GetFmortDateTime(string strDate)
{
    string[] format = { "yyyy-MM-ddTHH:mm:ss" };
    DateTime dt;
    if (DateTime.TryParseExact(strDate,format,CultureInfo.InvariantCulture,DateTimeStyles.None,out dt))
    {
        return dt.ToString("yyyy-MM-dd HH:mm:ss");
    }
    else
    {
        return strDate;
    }
}