Question

我有一个数组，其中包含我要选择的某些行，A和B：

[0] A1
[1] line I don't want to select
[2] B1
[3] line I don't want to select
[4] A2
[5] line I don't want to select
[6] B2
[7] line I don't want to select
[8] line I don't want to select
[9] line I don't want to select
[10] A3
[11] line I don't want to select
[12] B3

总是有一行包含A的行和包含B的行，因此在此示例中，这些行将是[1]，[5]，[11]

我想选择包含A的所有行，然后将它们与包含B的相应行配对，并创建一个如下所示的新数组：

[1] A1,B1
[2] A2,B2
[3] A3,B3

Answer 1

试试正则表达式：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;

namespace Select_specific_lines_in_an_array
{
    class Program
    {
        const string FILENAME = @"c:\temp\test.txt";
        static void Main(string[] args)
        {
            string line = "";
            int count = 0;

            List<List<string>> testlist = new List<List<string>>();
            List<string> templist = new List<string>();

            System.IO.StreamReader file = new System.IO.StreamReader(FILENAME);

            string pattern = @"^(?'letter'[A-Z]+)(?'number'\d+)$";

            while ((line = file.ReadLine()) != null)
            {
                line = line.Trim();

                if (line.Length > 0)
                {
                    Match match = Regex.Match(line, pattern);

                    if (match.Success)
                    {
                        Console.WriteLine("Letter : '{0}', Number : '{1}'", match.Groups["letter"], match.Groups["number"]);
                        templist.Add(line);
                        if (templist.Count == 2)
                        {
                            testlist.Add(templist);
                            templist = new List<string>();
                        }
                    }
                }
                count = count + 1;
            }
            file.Close();
            Console.ReadKey();
        }
    }
}

Answer 2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Select_specific_lines_in_an_array
{
    class Program
    {
        static void Main(string[] args)
        {
            string line = "";
            int count = 0;

            List<List<string>> testlist = new List<List<string>>();
            List<string> templist = new List<string>(); 

            System.IO.StreamReader file = new System.IO.StreamReader("inputfile.txt");
            while ((line = file.ReadLine()) != null)
            {
                if (line != "line I don't want to select")
                {
                    Console.WriteLine(line);
                    templist.Add(line);
                    if (templist.Count == 2)
                    {
                        testlist.Add(templist);
                        templist = new List<string>();
                    }
                }
                count = count + 1;
            }
            file.Close();
            Console.ReadKey();
        }
    }
}

在while循环结束时，testlist将如下所示：

注意这不是完美的代码，它的问题是： -it如果它进入A1 A2则依赖它A1 A1然后程序仍将运行并且工作但是它不会将A1和B1存储在一起它将存储 A1和A2在一起

但是我认为这应该足以让你有一个起点可以解决。

另外，作为最后一个注释，我使用了包含列表而不是多维数组的列表，因为我们一开始并不知道有多少数据是我们想要的。

编辑 - 示例输入文本

A1
line I don't want to select
B1
line I don't want to select
A2
line I don't want to select
B2
line I don't want to select
line I don't want to select
line I don't want to select
line I don't want to select
A3
line I don't want to select
B3

选择数组中的特定行

2 个答案: