C# 时间匹配
我用 C# 编写了一个小函数，这不是我的主要语言，所以对我来说有点陌生。
public bool CheckForKey(string key)
{
string strKeyTime = Decode(key);
//valid key will be current time +- 5 minutes
string strTheTime = DateTime.Now.ToString("HH:mm:ss tt");
if (strKeyTime == strTheTime)
{
return true;
}
else
{
return false;
}
}
我需要更改此设置以留出 5 分钟时间，所以 if (strKeyTime == strTheTime) 需要是 if (strKeyTime == strTheTime + or - 5 分钟)
我的问题是匹配时间，因为它们是字符串，也许先将键（原始时间）转换回日期，然后再执行，但我对 c# 很陌生
I have written a small function in C# which isn't my main launguage so is coming across a little foreign to me.
public bool CheckForKey(string key)
{
string strKeyTime = Decode(key);
//valid key will be current time +- 5 minutes
string strTheTime = DateTime.Now.ToString("HH:mm:ss tt");
if (strKeyTime == strTheTime)
{
return true;
}
else
{
return false;
}
}
I need to alter this to allow for 5 minutes, so
if (strKeyTime == strTheTime)
needs to be
if (strKeyTime == strTheTime + or - 5 minutes)
my problem is matching the times as they are strings, perhaps convert key(original time) back to a date first and then do it, but I am pretty new to c#
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如果您将它们都转换（或保留）为 DateTimes，您可以使用 TimeSpan：
研究使用 DateTime.ParseExact （或任何 Parse... 方法）来解析你的 strKeyTime，然后执行与上面类似的操作。
If you convert (or keep) them both to DateTimes you can use TimeSpan:
Look into using the DateTime.ParseExact (or any of the Parse... methods) to parse your strKeyTime, and then do something similar to the above.
要将发送的字符串转换为等效的 DateTime 值，请使用以下代码：
从这里，您可以使用该值与原始时间值进行比较，如下所示：
上一个代码块将首先检查我们是否获得完全匹配，或者发送到该方法的时间介于原始时间和额外 5 分钟的时间偏移之间。
就是这样，如果这不是您需要的，请告诉我，以便我可以为您更新我的答案，谢谢。
-- 如果我的答案是正确的，请不要忘记“标记为答案”。
To convert your sent string to the equivalent DateTime value, use the following code:
from here, you can use this value to compare with your original time value as the following:
the previous block of code will first check if we got an exact match, or the time sent to the method is between the original time and a time shift of additional 5 minutes.
that's it, if this is not what you need, let me know so I may update my answer for you, thanks.
-- if my answer is correct, don't forget to "Mark as answer".
“也许先将密钥（原始时间）转换回日期，然后再执行”听起来像是一个合理的解决方案。我会这样做：
DateTime.Subtract(DateTime value)存储 TimeSpan 实例中的差异 (http://msdn.microsoft.com/en-us/library/8ysw4sby.aspx )如果没有有关字符串格式化方式的信息，我无法为第一步提供任何建议。然而，一旦完成了这一点，剩下的事情就很容易了。
"perhaps convert key(original time) back to a date first and then do it" sounds like a sound solution. I'd do it this way:
DateTime.Subtract(DateTime value)( http://msdn.microsoft.com/en-us/library/8ysw4sby.aspx )The first step is something I can't really give you any advice on without information concerning how your string is formatted. However, once this is done, the rest should be easy.