逗号和双引号CSV格式的正则表达式拆分[重复]

Posted 2023-04-13

【中文标题】逗号和双引号CSV格式的正则表达式拆分[重复]

【英文标题】：Regex split for comma and double quotes CSV format [duplicate]

【发布时间】：2016-02-14 22:15:00

【问题描述】：

我不是很擅长正则表达式。

字符串：

"FF","asdadasd60","Report,License","502","5A1301","I-Web Report,License","50A1","PR02","02","5A11","REL","","","","A1170600","500008","FA10","5000001","","","","","000000000.000","","000000000.000","","000000000.000","","000000000.000","","00000000","00000000","",""

我已经这样做了，但之前删除了双引号。但是字符串Report,License 和I-Web Report,License 的结果被拆分了。这是错误的。

我想用逗号将它拆分成数组，用逗号放在不在其中的双引号之间。

【问题讨论】：

我会手动执行此操作。你知道，List<string>、for-loop 和Substring。我猜它的性能更高。

var values = Regex.Split(line, ",(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$ )");

【参考方案1】：

使用真正的 csv 解析器，而不是使用字符串方法或正则表达式。您可以直接使用框架中唯一可用的TextFieldParser：

var allLineFields = new List<string[]>();
using (var parser = new Microsoft.VisualBasic.FileIO.TextFieldParser(new StringReader(str)))

    parser.Delimiters = new string[]  "," ;
    parser.HasFieldsEnclosedInQuotes = true; // <--- !!!
    string[] lineFields;
    while ((lineFields = parser.ReadFields()) != null)
    
        allLineFields.Add(lineFields);
    

您需要在项目中添加对Microsoft.VisualBasic dll 的引用。

还有其他可用的：Parsing CSV files in C#, with header