I know this is an old question, but the problem is not going away soon. CSV files are easy to generate from most programming languages, rather small, human-readable in a crunch with a plain text editor, and ubiquitous. The problem is not only with dates in text fields, but anything numeric also gets converted from text to numbers. A couple of examples where this is problematic: ZIP/postal codes telephone numbers government ID numbers which sometimes can start with one or more zeroes (0), which get thrown away when converted to numeric. Or the value contains characters that can be confused with mathematical operators (as in dates: /, -). Two cases that I can think of that the "prepending =" solution, as mentioned previously, might not be ideal is where the file might be imported into a program other than MS Excel (MS Word's Mail Merge function comes to mind), where human-readability might be important. My hack to work around this If one pre/appends a non-numeric and/or non-date character in the value, the value will be recognized as text and not converted. A non-printing character would be good as it will not alter the displayed value. However, the plain old space character (\s, ASCII 32) doesn't work for this as it gets chopped off by Excel and then the value still gets converted. But there are various other printing and non-printing space characters that will work well. The easiest however is to append (add after) the simple tab character (\t, ASCII 9). Benefits of this approach: Available from keyboard or with an easy-to-remember ASCII code (9), It doesn't bother the importation, Normally does not bother Mail Merge results (depending on the template layout - but normally it just adds a wide space at the end of a line). (If this is however a problem, look at other characters e.g. the zero-width space (ZWSP, Unicode U+200B) is not a big hindrance when viewing the CSV in Notepad (etc), and could be removed by find/replace in Excel (or Notepad etc). You don't need to import the CSV, but can simply double-click to open the CSV in Excel. If there's a reason you don't want to use the tab, look in an Unicode table for something else suitable. Another option might be to generate XML files, for which a certain format also is accepted for import by newer MS Excel versions, and which allows a lot more options similar to .XLS format, but I don't have experience with this. So there are various options. Depending on your requirements/application, one might be better than another. Addition It needs to be said that newer versions (2013+) of MS Excel don't open the CSV in spreadsheet format any more - one more speedbump in one's workflow making Excel less useful... At least, instructions exist for getting around it. See e.g. this Stackoverflow: How to correctly display .csv files within Excel 2013? .

根据Jarod的解决方案和Jeffiekins提出的问题，你可以进行修改

"May 16, 2011"

to

"=""May 16, 2011"""

警告:Excel '07(至少)有一个(另一个)错误:如果字段的内容中有逗号，它不会正确解析="field, contents"，而是将逗号后的所有内容放入下面的字段中，而不管引号是什么。

我发现唯一有效的解决方法是当字段内容包含逗号时消除=。

这可能意味着有些字段不可能在Excel中完全“正确”地表示，但到目前为止，我相信没有人会感到太惊讶。

这个问题仍然存在于Mac Office 2011和Office 2013，我无法阻止它发生。这似乎是很基本的事情。

在我的例子中，我有诸如“1 - 2”和“7 - 12”的值，在CSV中正确地用倒逗号括起来，这将自动转换为excel中的日期，如果您尝试随后将其转换为纯文本，您将得到日期的数字表示形式，如43768。此外，它将条形码和EAN编号中的大数字重新格式化为123E+数字，再次无法转换回来。

我发现谷歌驱动器的谷歌表不能将数字转换为日期。条形码中每3个字符有一个逗号，但这些很容易被删除。它处理csv非常好，特别是在处理MAC / Windows csv时。

说不定还能救人。

如果有人还在寻找答案，下面这句话对我来说非常合适

我输入=("my_value")。 即=("04SEP2009")显示为04SEP2009，而不是09/04/2009

这同样适用于大于15位的整数。他们不再修剪了。

这周我刚刚遇到了这个惯例，它似乎是一个很好的方法，但我在任何地方都找不到它。有人熟悉吗?你能举出出处吗?我没有找了几个小时，但我希望有人会认识到这种方法。

例1:=("012345678905")显示为012345678905

例2:=("1954-12-12")显示为1954-12-12，而不是12/12/1954。