正在检查TimeSpan

Question

我有一个查询active directory的方法，并将上次密码重置的值返回给一个本地变量。我正在尝试将该值与当前日期和时间进行比较，并检查是否小于24小时。我想我已经很接近了，但似乎不能让它起作用。

谢谢，杰森

string passwordLastSet = string.Empty;
passwordLastSet = DateTime.FromFileTime((Int64)(result.Properties["PwdLastSet"][0])).ToString();  
public string lastReset(DateTime pwordLastReset)
{
    if (DateTime.Now.AddHours(24) <= passwordLastSet)
    {
        return "try again later";
    }
    else
    {
        return "all is good";
    }
}

Answer 1

这一点：

 if (DateTime.Now.AddHours(24) <= passwordLastSet)

应该是

   if (DateTime.Now <= passwordLastSet.AddHours(24))

Answer 2

我正在尝试将该值与当前日期和时间进行比较，并检查是否小于24小时。

这段代码几乎是自己写的。

DateTime timeOfLastPasswordReset = // get time of last password reset
DateTime now = DateTime.Now;
TimeSpan difference = now.Subtract(timeOfLastPasswordReset);
if(difference < TimeSpan.FromHours(24)) {
    // password was reset less than twenty-four hours ago
}
else {
    // password was reset no less than twenty-four hours ago
}

请注意，代码的读法与您用英语指定的完全相同。

Answer 3

(假设我没看错你的意图)：

// Does passwordLastSet, with 24 hours added to it, fall before or after DateTime.Now?
// If AFTER, then reject, if BEFORE, then accept
if (passwordLastSet.Add(new TimeSpan(24, 0, 0)) > DateTime.Now)
{
    // Password was last set within the last 24 hours
    return "try again later";
}
else
{
    return "all is good";
}