C#文本分割逻辑逗号分隔符和字符串标识符

Question

我需要按 "comma seperater"... 和 "string identifier"

拆分文本

输入"dtl.txt"

AWD_CODE,AWD_NAME,AWD_TYPE,ADF_REF,FLG_SUM,FLG
DMM,PETCH,01,REF 2/2015,,
TRR,TUCTH,01,REF 2/2015,WD_TRK,F
TGC,DHYTH,02,REF 3/2015,"WD_TRK,WD_TRI",F

操作

  static void Main(string[] args)
        {
            string[] lines = System.IO.File.ReadAllLines(@"D://dtl.txt");

            List<string[]> param = new List<string[]>();

            foreach(string line in lines)
            {
                param.Add(line.Split(','));
            }

            var x = param; // for debug
        }

输出(get)

array : 
[0] : "AWD_CODE","AWD_NAME","AWD_TYPE","ADF_REF","FLG_SUM","FLG"
[1] : "DMM","PETCH","01","REF 2/2015","",""
[2] : "TRR","TUCTH","01","REF 2/2015","WD_TRK","F"
[3] : "TGC","DHYTH","02","REF 3/2015","\"WD_TRK","WD_TRI\"","F"

输出（需要）

array : 
[0] : "AWD_CODE","AWD_NAME","AWD_TYPE","ADF_REF","FLG_SUM","FLG"
[1] : "DMM","PETCH","01","REF 2/2015","",""
[2] : "TRR","TUCTH","01","REF 2/2015","WD_TRK","F"
[3] : "TGC","DHYTH","02","REF 3/2015","WD_TRK,WD_TRI","F"

"WD_TRK,WD_TRI" 是的，代码也拆分了它。

但是我不需要，谁能帮忙解决这个问题？

Answer 1

除非您在这种特殊情况下使用专门的 CSV 库（强烈推荐），否则您将需要编写一个正则表达式。有关类似问题，请参阅 C#, regular expressions : how to parse comma-separated values, where some values might be quoted strings themselves containing commas。给出的正则表达式是

"[^"\r\n]*"|'[^'\r\n]*'|[^,\r\n]*

用这段代码来执行它：

Regex regexObj = new Regex(@"""[^""\r\n]*""|'[^'\r\n]*'|[^,\r\n]*");
Match matchResults = regexObj.Match(input);
while (matchResults.Success) 
{
    Console.WriteLine(matchResults.Value);
    matchResults = matchResults.NextMatch();
}

Answer 2

这是 Microsoft.VisualBasic.FileIO 库中 TextFieldParser 最适合的情况。

using Microsoft.VisualBasic.FileIO; //add this

static void Main(string[] args)
{
    string text = System.IO.File.ReadAllText(@"D://dtl.txt"); //note this

    List<string[]> param = new List<string[]>();
    string[] words; //add intermediary reference

    using (TextFieldParser parser = new TextFieldParser(new StringReader(text))) {
        parser.Delimiters = new string[] { "," }; //the parameter must be comma
        parser.HasFieldsEnclosedInQuotes = true;
        while ((words = parser.ReadFields()) != null)
            param.Add(words);
    }

    var x = param; // for debug
}

你会得到你需要的。阅读 this.

输出：

array : 
[0] : "AWD_CODE","AWD_NAME","AWD_TYPE","ADF_REF","FLG_SUM","FLG"
[1] : "DMM","PETCH","01","REF 2/2015","",""
[2] : "TRR","TUCTH","01","REF 2/2015","WD_TRK","F"
[3] : "TGC","DHYTH","02","REF 3/2015","WD_TRK,WD_TRI","F"

要使用它，您需要在参考中包含 Microsoft.VisualBasic。

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