Question

之前我问过这个问题，但是大多数人都不理解我的问题。

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

在gamenam.txt我有这样的字符串：

我写了一段代码to count number of times substring "05" appears in text file before substring "01"。

写入gamenam_1.txt的输出是：

这是我为实现

而编写的代码

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.");
}

该代码运作正常。

现在我必须在编写行之前编写代码 来打印子串“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，然后再写入临时数组中的行。

我是开发新手，所以我一直想弄清楚我是如何实现这一目标的。

任何帮助都将受到高度赞赏。

Answer 1

试试这个

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.");
}

从文本文件写入临时数组

1 个答案: