我有一百个来自文本文件的数据行，使用Regex MatchCollection捕获并将其输出为逗号分隔（csv）文件，以便在excel中进行后续检查。
我的正则表达式如下： -
Regex Line3 = new Regex(@"(?<one>[0-9]{2}-[0-9]{2}-[0-9]{2})\s{1,20}114B\s{1,15}(?<two>\d{1,11})\s{1,15}(?<three>\d{1,11})\s{1,15}(?<four>\d{1,11})\s{1,30}(?<five>\d{1,11})");//<one> catpures the date data.
MatchCollection matches = Line3.Matches(line1);
foreach (Match m in matches)
{
Writer1.WriteLine("")//
//Writer1.Write(line1.Substring(1, 27) + ","); //Do not consider this.
Writer1.Write(m.Groups["one"].Value + ",");
Writer1.Write(m.Groups["two"].Value + ",");
Writer1.Write(m.Groups["three"].Value + ",");
Writer1.Write(m.Groups["four"].Value + ",");
Writer1.Write(m.Groups["five"].Value + ",");
}
我的tex文件将始终包含与正则表达式匹配的统一数据，并且由于正则表达式设计师的天才，我的程序可以精美地捕获所需的信息。
但是当我在excel中打开csv文件（双击.csv）时，包含日期数据的列会不规则地显示在下面。
12-04-2012,0,0,0,0, //appears right-aligned in excel.
12-04-2012,0,0,0,0, //this is how it looks like in Editpad Lite.
12-04-2012,0,0,0,0, // these dashes appears in excel as as 12/4/2012
12-04-2012,0,0,0,0, //next five lines as well.
12-04-2012,0,0,0,0,
12-04-2012,0,0,0,0, //
12-04-2012,5467,757488,846815,0,
13-04-12,0,0,0,0, //appears left aligned in excel.
13-04-12,0,0,0,0,
20-04-12,0,0,500,0,
21-04-12,1740,17905,17900,0,
21-04-12,0,0,0,0,
24-04-12,1466,31666,31420,0,
我的输入文件看起来像。
12-04-12 114B 0 0 0 0
12-04-12 114B 0 0 0 0
12-04-12 114B 0 0 0 0
12-04-12 114B 0 0 0 0
12-04-12 114B 0 0 0 0
12-04-12 114B 0 0 0 0
12-04-12 114B 5467 757488 846815 0
13-04-12 114B 0 0 0 0
13-04-12 114B 0 0 0 0
20-04-12 114B 0 0 500 0
21-04-12 114B 1740 17905 17900 0
21-04-12 114B 0 0 0 0
24-04-12 114B 1466 31666 31420 0
当我用记事本检查.csv文件时，输出非常均匀。只有当我在excel中打开csv文件时才会出现问题。
你们中的任何人都可以帮助解决不一致的原因吗？。
答案 0 :(得分：0)
如果以yyyy-MM-dd格式输出日期，则Excel应将其解析为日期。
您可以使用适当的CultureInfo将文本dd-MM-yy转换为DateTime，然后以yyyy-MM-dd格式写出日期就很容易了。
using System;
using System.Globalization;
using System.IO;
using System.Text.RegularExpressions;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string inFile = @"C:\temp\sampledata.txt";
string outFile = @"C:\temp\sampledata.csv";
//<one> catpures the date data:
Regex re = new Regex(@"(?<one>[0-9]{2}-[0-9]{2}-[0-9]{2})\s{1,20}114B\s{1,15}(?<two>\d{1,11})\s{1,15}(?<three>\d{1,11})\s{1,15}(?<four>\d{1,11})\s{1,30}(?<five>\d{1,11})");
using (var sr = new StreamReader(inFile))
{
using (var sw = new StreamWriter(outFile))
{
string line1;
DateTime dt;
var ci = new CultureInfo("ur-PK");
while (!sr.EndOfStream)
{
line1 = sr.ReadLine();
MatchCollection matches = re.Matches(line1);
foreach (Match m in matches)
{
dt = DateTime.Parse(m.Groups["one"].Value, ci);
sw.Write(dt.ToString("yyyy-MM-dd") + ",");
sw.Write(m.Groups["two"].Value + ",");
sw.Write(m.Groups["three"].Value + ",");
sw.Write(m.Groups["four"].Value + ",");
sw.Write(m.Groups["five"].Value + Environment.NewLine);
}
}
}
}
}
}
}
我用过＆＃34; ur-PK＆＃34;正如您所提到的那样，您的输入文件日期格式是在印度和巴基斯坦使用的，但有几个-IN代码可供选择，我不知道其中一个是否可能不适合您的使用。
使用您显示的样本数据输出：
2012-04-12,0,0,0,0
2012-04-12,0,0,0,0
2012-04-12,0,0,0,0
2012-04-12,0,0,0,0
2012-04-12,0,0,0,0
2012-04-12,0,0,0,0
2012-04-12,5467,757488,846815,0
2012-04-13,0,0,0,0
2012-04-13,0,0,0,0
2012-04-20,0,0,500,0
2012-04-21,1740,17905,17900,0
2012-04-21,0,0,0,0
2012-04-24,1466,31666,31420,0
当您在Excel中打开csv文件时，它应该识别＆＃34; 2012-04-12＆＃34;等等，不管Windows日期格式设置如何。我没有Excel来测试。
应该然后以Windows短日期格式设置显示日期。
答案 1 :(得分：0)
为了解决问题，我认为这个观点特别是安德鲁莫顿的观点。
这是我用来解决并在excel中正确使用的方法。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO; //for StreamReader and StreamWriter
using System.Text.RegularExpressions;
using System.Windows.Forms;
using System.Globalization; //from two digit date to four digit date conversion.
namespace Experiment2
{
class DemandRefundOnly
{
public line1 {get; set;}
public Line3 {get; set;}
DateTime dateTime;
int FourDigitYear;
int Month;
int Day;
DateTime dateTime;
Regex Line3 = new Regex(@"(?<one>[0-9]{2}-[0-9]{2}-[0-9]{2})\s{1,20}114B\s{1,15}(?<two>\d{1,11})\s{1,15}(?<three>\d{1,11})\s{1,15}(?<four>\d{1,11})\s{1,30}(?<five>\d{1,11})");//Regex to capture data. //<one> catpures the date data.
//Only the relevant date part is going to be shown in the output given.
using (StreamReader Reader1 = new StreamReader(@"C:\Users\UK\data.txt"))
{ //StreamREader to read the input text file.
using(StreamWriter Writer1 = new StreamWriter(@"C:\Users\Sample.csv"))
{ //StreamWriter to wrie to the output file.
while((line1 = Reader1.ReadLine())!= null)
{ //to loop through the input file.
MatchCollection matches = Line3.Matches(line1);
foreach (Match m in matches)
{ //for...each to loop through and print the matches.
//Writer1.Write(m.Groups["one"].Value + ","); //this line modified with the following.
Day = Convert.ToInt32(m.Groups["one"].Value.Substring(0, 2));
//the above captures the first two digits date string contained in m.Groups["one"].Value and stores the first two characters as int to Day.
Month = Convert.ToInt32(m.Groups["one"].Value.Substring(3, 2));
FourDigitYear = Convert.ToInt32(m.Groups["one"].Value.Substring(6, 2));
FourDigitYear = CultureInfo.CurrentCulture.Calendar.ToFourDigitYear(FourDigitYear);
dateTime = new DateTime(FourDigitYear, Month, Day);
Writer1.WriteLine(dateTime);
}
}
}
}
}
}
使用StreamWriter写入的outputput文件看起来像。
4/5/2012 12:00:00 AM
4/5/2012 12:00:00 AM
4/9/2012 12:00:00 AM
4/9/2012 12:00:00 AM
4/9/2012 12:00:00 AM
4/9/2012 12:00:00 AM
4/9/2012 12:00:00 AM
4/12/2012 12:00:00 AM
我尝试将新创建的输出文件导入Excel（其中在一列中）日期以统一的方式正确显示。这是我可以接受的，因为我们在印度使用斜线或破折号甚至点来分隔dd mm yy。这对我来说没问题。我也承认我从Stackoverflow本身获得了FourDigit Converter代码行。特别感谢@AdrianHHH和@Andrew Morten，他们为我积极地花了一些宝贵的时间。