从文本文件写入临时数组

Question

我之前问过这个，但大多数人都不理解我的问题。

我有两个文本文件。 Gamenam.txt是我正在阅读的文本文件，gam enam_2.txt 。

在gamenam.txt我有这样的字符串：

01456
02456
05215
05111
01421
03117
05771
01542
04331
05231

我编写了一个代码to count number of times substring "05" appears in text file before substring "01" 。

写入gamenam_1.txt输出是：

01456
02456
05215
05111
2
01421
03117
05771
1
01542
04331
05231
1

这是我写的代码

string line;
int counter = 0;
Boolean isFirstLine = true;
try
{
    StreamReader sr = new StreamReader("C:\\Files\\gamenam.txt");
    StreamWriter sw = new StreamWriter("C:\\Files\\gamenam_1.txt");

    while ((line = sr.ReadLine()) != null)
    {
        if (line.Substring(0, 2) == "01")
        {
            if (!isFirstLine)
            {
                sw.WriteLine(counter.ToString());
                counter = 0;
            }
        }

        if (line.Substring(0, 2) == "05")
        {
            counter++;
        }

        sw.WriteLine(line);

        if (sr.Peek() < 0)
        {
            sw.Write(counter.ToString());
        }

        isFirstLine = false;
    }

    sr.Close();
    sw.Close();
}
catch (Exception e)
{
    Console.WriteLine("Exception: " + e.Message);
}
finally
{
    Console.WriteLine("Exception finally block.");
}

该代码工作正常。

现在我必须编写一个代码来在写行之前打印子串“05”的计数 。

我的输出应该是这样的：

2
01456
02456
05215
05111
1
01421
03117
05771
1
01542
04331
05231

显然我应该首先将行写入临时字符串数组，计数然后写入计数，然后写入临时数组中的行。

我是新手，所以我一直想弄清楚我是如何实现这一目标的。

任何帮助将非常感谢。

Answer 1

尝试这个

string line;
int counter = 0;
Boolean isFirstLine = true;
try
{
    StreamReader sr = new StreamReader("C:\\Files\\gamenam.txt");
    StreamWriter sw = new StreamWriter("C:\\Files\\gamenam_1.txt");

    var lines = new List<string>(); //Here goes the temp lines
    while ((line = sr.ReadLine()) != null)
    {
        if (line.Substring(0, 2) == "01")
        {
            if (!isFirstLine)
            {
                sw.WriteLine(counter.ToString()); //write the number before the lines
                foreach(var l in lines)
                    sw.WriteLine(l);  //actually write the lines
                counter = 0;
                lines.Clear(); //clear the list for next round
            }
        }

        if (line.Substring(0, 2) == "05")
        {
            counter++;
        }

        lines.add(line); //instead of writing, just adds the line to the temp list

        if (sr.Peek() < 0)
        {
            sw.WriteLine(counter.ToString()); //writes everything left
            foreach(var l in lines)
                sw.WriteLine(l);
        }

        isFirstLine = false;
    }

    sr.Close();
    sw.Close();
}
catch (Exception e)
{
    Console.WriteLine("Exception: " + e.Message);
}
finally
{
    Console.WriteLine("Exception finally block.");
}