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? .

在Excel 2010中打开一个新工作表。 在“数据”ribbon上单击“从文本中获取外部数据”。 选择您的CSV文件，然后单击“打开”。 单击“下一步”。 取消“Tab”，在“逗号”旁边打勾，然后点击“下一步”。 单击第一列上的任意位置。 按住shift键拖动滑块，直到可以单击最后一列，然后松开shift键。 点击“文本”单选按钮，然后点击“完成”

所有列都将作为文本导入，就像它们在CSV文件中一样。

而创建字符串要写入我的CSV文件在c#中，我必须这样格式化它:

"=\"" + myVariable + "\""

(假设Excel 2003…)

当使用文本到列向导时，在步骤3中，您可以为每个列指定数据类型。单击预览中的列，将行为不端的列从“常规”更改为“文本”。

如果可以更改文件源数据

如果您准备更改原始源CSV文件，另一种选择是更改数据中的“分隔符”，因此如果您的数据是“4/11”(或4-11)，Excel将其转换为4/11/2021(英国或11-4-2021美国)，那么将“/”或“-”字符更改为其他字符将阻止不想要的Excel日期转换。选项包括:

波浪号(~) +(“+”) 下划线(“_”) 双破折号(“-”) En-dash (Alt 150) Em-dash (Alt 151) (其他角色!)

注意:如果文件要在其他地方使用，则移动到Unicode或其他非ascii/ansi字符可能会使问题复杂化。

因此，'4-11'转换为'4~11'与波浪号将不会被视为日期!

对于大型CSV文件，这没有额外的开销(即:额外的引号/空格/制表符/公式结构)，只在文件直接打开时工作(即:双击CSV打开)，并避免将列预先格式化为文本或“导入”CSV文件为文本。

如果需要，在记事本(或类似工具)中的搜索/替换可以轻松地转换为/从替代分隔符。

导入原始数据

在新版本的Excel中，您可以导入数据(在其他答案中概述)。 在较旧版本的Excel中，您可以安装“Power Query”插件。该工具还可以导入csv而不进行转换。选择:Power Query选项卡/来自文件/来自文本- csv，然后“Load”以表格形式打开。(您可以从“数据类型检测”选项中选择“不检测数据类型”)。

我做了这个VBA宏，基本上在粘贴数字之前将输出范围格式化为文本。当我想要粘贴诸如8/11、23/6、1/3等值时，它非常适合我，而Excel不会将它们解释为日期。

Sub PasteAsText()
' Created by Lars-Erik Sørbotten, 2017-09-17
Call CreateSheetBackup
    
Columns(ActiveCell.Column).NumberFormat = "@"
    
Dim DataObj As MSForms.DataObject
Set DataObj = New MSForms.DataObject
DataObj.GetFromClipboard

ActiveCell.PasteSpecial

End Sub

我很想知道这是否也适用于其他人。我一直在寻找一个解决这个问题的方法有一段时间了，但我还没有看到一个快速的VBA解决方案，不包括在输入文本前面插入。该代码以原始形式保留数据。