最简单的解决方案 我今天才想出来的。

用Word打开 用连字符替换所有连字符 保存并关闭 在Excel中打开

一旦你完成编辑，你可以再次在Word中打开它，再次用连字符替换破折号。

对于同样的问题，我所做的是在每个csv值之前添加以下内容: “=”“” 在Excel中打开文件之前，在每个CSV值后加上双引号。以以下值为例:

012345,00198475

在Excel中打开之前，这些应该更改为:

"="""012345","="""00198475"

这样做之后，每个单元格值在Excel中都显示为公式，因此不会格式化为数字、日期等。例如，012345的值显示为:

="012345"

None of the solutions offered here is a good solution. It may work for individual cases, but only if you're in control of the final display. Take my example: my work produces list of products they sell to retail. This is in CSV format and contain part-codes, some of them start with zero's, set by manufacturers (not under our control). Take away the leading zeroes and you may actually match another product. Retail customers want the list in CSV format because of back-end processing programs, that are also out of our control and different per customer, so we cannot change the format of the CSV files. No prefixed'=', nor added tabs. The data in the raw CSV files is correct; it's when customers open those files in Excel the problems start. And many customers are not really computer savvy. They can just about open and save an email attachment. We are thinking of providing the data in two slightly different formats: one as Excel Friendly (using the options suggested above by adding a TAB, the other one as the 'master'. But this may be wishful thinking as some customers will not understand why we need to do this. Meanwhile we continue to keep explaining why they sometimes see 'wrong' data in their spreadsheets. Until Microsoft makes a proper change I see no proper resolution to this, as long as one has no control over how end-users use the files.

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 + "\""

另一种方法:

将要更改的列的格式转换为“Text”。选择要保留的所有单元格，复制。在不取消这些列的情况下，单击“编辑>粘贴特殊> As值”

保存为CSV。请注意，这必须是您对文件所做的最后一件事，因为当您重新打开它时，它将自己格式化为日期，因为单元格格式不能保存在CSV文件中。

我对不断转换为科学符号的信用卡号这样做:我最终将.csv导入到谷歌Sheets中。导入选项现在允许禁用数字值的自动格式化。我将任何敏感列设置为纯文本并下载为xlsx。

这是一个糟糕的工作流程，但至少我的价值观保持了原样。