英文:
VB - Different Results With String-Date Concatenation On Different Machines
问题
我的同事和我在调试一个问题时遇到了一个奇怪的情况：相同的VB代码在我的机器和他的机器上产生了不同的输出。我们无法弄清楚为什么。
这段代码是这样的：
Dim textForMatching = unmatchedRecord.MetaDataString + " - " + unmatchedEvent.StartDate?.ToLocalTime().Date
在我的机器上，输出结果可能是类似于 "10d775fff794 - 06/15/2023"，而在他的机器上，输出结果是 "10d775fff794 - 6/15/2023"。我的日期输出中那个前导的 "0" 在他的机器上丢失了。
我们处于相同的时区，使用的是相同版本的Visual Studio。
有人知道为什么会发生这种情况吗？这是由于使用 "+" 运算符进行隐式转换为字符串导致的本地化相互作用吗？还是我们的计算机上可能有稍微不同的设置导致了这个问题？
英文:
My co-worker and I were debugging an issue when we came across something curious: the same bit of VB code produces a different output on my machine versus his. We cannot figure out why.
The code:
Dim textForMatching = unmatchedRecord.MetaDataString + " - " + unmatchedEvent.StartDate?.ToLocalTime().Date
On my machine, the output would be something like 10d775fff794 - 06/15/2023 while on his machine the output is 10d775fff794 - 6/15/2023. That leading 0 in my date output is missing from his.
We're in the same time-zone and we're both using the same version of Visual Studio.
Does anyone know why this happens? It is some localization interplay due to the implicit conversion to a string by using the + operator? Or are there settings on our computers which could be slightly different and lead to this?
答案1
得分: 2
检查您的注册表：HKEY_CURRENT_USER\Control Panel\International，查看sShortDate设置。它在每台机器上是否不同？
我相信这是确定要使用的日期格式的方式。
英文:
Check your registry: HKEY_CURRENT_USER\Control Panel\International the sShortDate setting. Is it different on each machine?
I believe this is how it determines the date format to use.
答案2
得分: 1
你应该学习文档。
然后你会发现：
> 请注意，确切的输出取决于当前的区域设置和系统上运行的本地时区。
所以，原因是你正在使用不同的Windows日期和时间设置。
英文:
You should study the documentation.
Then you'll find:
> Note that the exact output depends on the current culture and the
> local time zone of the system on which it is run.
So, the reason is that you are using different Windows settings for date and time.
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