C＃文本拆分邏輯逗號分隔符和字符串標識符

Question

我需要用“逗號分隔 符”和“字符串標識符”分割文本

輸入 “ 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
        }

輸出 （獲取）

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"

輸出 （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，代碼也將其拆分。

但是我不需要，任何人都可以幫助解決這個問題嗎？

Answer 1

在這種情況下， Microsoft.VisualBasic.FileIO庫中的TextFieldParser最適合。

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
}

您將得到所需的東西。 閱讀此 。

輸出：

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"

若要使用它，您需要在參考中包括Microsoft.VisualBasic 。

Answer 2

除非在這種情況下（特別推薦）使用專門的CSV庫，否則您將需要編寫正則表達式。 參見C＃，正則表達式：如何解析逗號分隔的值，其中一些值可能被引號包括相似問題的字符串本身包含逗號 。 那里給出的正則表達式是

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

用以下代碼執行它：

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();
}