在C＃中，如何在逗号分隔文件中的另一个双引号内删除/替换Double Quote？

Question

How do I remove or replace the Double Quote inside another double quote within a comma delimited file?

Following is the Text File content:

,"188 "F" ST #1",

I need to take off the double quote as below:

,"188 F ST #1",

I've been trying regex and other replace functions but cannot figure this out. Any help would be greatly appreciated!

Thanks

Answer 1

This problem is inherently under-specified, because it does not offer any way to distinguish quotes inside the quoted string from the quote that closes up the string.

One way to define this would be "all quotes not preceded and not followed by a comma", thus excluding ," and ", sequences from consideration; you also need to preserve initial and trailing quotes.

Here is a regex to do it:

(?<!^|,)\"(?!$|,)

The quote character \\" in the middle of the expression is surrounded by a negative look-behind on the left and a negative look-ahead on the right. The look-behind rejects quotes at the beginning of line and quotes that follow a comma. The look-ahead rejects quotes at the end of the line, and quotes followed by a comma.

Demo.

Answer 2

try this

string content = "words ,\"188 \"F\" ST #1\", more words";    
content =content.Replace("\"","");
content ="\"" + content.Replace(",","\",\"") + "\"";

This will wrap every comma with double quotes, it will also make sure the string starts and ends with a double quote

DEMO