datediff 和 dateadd 函数的问题
If DateDiff(DateInterval.Day, moDoBooking.m_CurrentDay, moDoBooking.m_BaseDay) _
> DateDiff(DateInterval.Day, DateAdd(DateInterval.Day, _
Convert.ToDouble(moDoBooking.oBooking.oFacility.ADAYS), moDoBooking.m_BaseDay), _
moDoBooking.m_BaseDay) Then
这个条件不能满足这些值：
moDobooking.m_CurrentDay = 2/3/2011
moDobooking.m_BaseDay = 22/02/2011
moDoBooking.oBooking.oFacility.ADAYS = 1
你可能会说这太简单了，但说实话，现在已经很晚了，我的头根本不工作！谁能告诉我这是为什么吗？
If DateDiff(DateInterval.Day, moDoBooking.m_CurrentDay, moDoBooking.m_BaseDay) _
> DateDiff(DateInterval.Day, DateAdd(DateInterval.Day, _
Convert.ToDouble(moDoBooking.oBooking.oFacility.ADAYS), moDoBooking.m_BaseDay), _
moDoBooking.m_BaseDay) Then
This condition won't satisfy with these values:
moDobooking.m_CurrentDay = 2/3/2011
moDobooking.m_BaseDay = 22/02/2011
moDoBooking.oBooking.oFacility.ADAYS = 1
You might say this is dead-easy but honestly it's late here and my head is not working at all! Could AnyOne tell me why is that?
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我希望您的布尔条件始终返回false。
为什么？因为两天之间的天数差始终小于差值 + 1。
I would expect your boolean condition to always return false.
Why? Because the difference in days between two days will always be less than the difference + 1.
我不确定您在寻找什么，但我怀疑该符号与您期望的相反，因为这些值为负数。正如之前有人提到的，你的 if 语句是混淆的。帮自己一个忙，创建临时变量来保存这些值，然后进行比较。在您想要做什么之前，您至少还需要 3 个变量。
I'm not sure what you are looking for but I suspect the sign is opposite what you expect because the values are negative. As someone previously mentioned your if statement is obfuscated. Do yourself a favor and create interim variables to hold the values and then compare. You need at least 3 more variables before it will become obvious what you are trying to do.