来自具有特定值的文本文件的 C# 数组

Question

我有一个名为 failas.txt 的文件。它包含立陶宛语文本。我为它编码了 1257，所以它可以读取立陶宛字母。

现在我要做的就是为该文件中使用的每个立陶宛字母创建一个数组。

所有这些字母都在字符串 p = "AĄBCČDEĘĖFGHIĮYJKLMNOPRSŠTUŲŪVZŽ";

中

数组应显示文本中每个字母重复的次数，并将这些结果写入名为 rezultatai.txt 的新 txt 文件。所以代码是这样的：

using System;
using System.Linq;
using System.Globalization;
using System.Collections.Generic;
using System.Collections;
using System.IO; skirta biblioteka
using System.Text;
using System.Threading;
class Program 
{
static void Main()
    {

    string failas = "failas.txt"; 
    string rodymas = File.ReadAllText(failas, Encoding.GetEncoding(1257)); 
    Console.OutputEncoding = Encoding.UTF8;
    Console.WriteLine(rodymas); 
    char[] masyvas = rodymas.Where(Char.IsLetter).OrderBy(Char.ToLower).ToArray(); 
    foreach (char c in masyvas)

    {
        Console.Write(c + ",");
    }
    string p = "AĄBCČDEĘĖFGHIĮYJKLMNOPRSŠTUŲŪVZŽ";
    failas = failas.ToUpper();
    Dictionary<char, int> dict = new Dictionary<char, int>();

    foreach (char c in p) dict.Add(c, 0);
    foreach (char c in failas)
    {
        int val;
        if (dict.TryGetValue(c, out val)) dict[c] = val + 1;
    }

    //write to a file..
    foreach (KeyValuePair<char, int> item in dict)
    {
        if (item.Value > 0) Console.WriteLine("Character {0}, No of Occurences = {1}", item.Key, item.Value);
        File.AppendAllText("rezultatai.txt", item.Value + Environment.NewLine);
    }
    Console.WriteLine("Sum = {0}", dict.Sum(x => x.Value));
    Console.ReadKey();

然而，不知何故 returns 只输出字母 A、F、I、L、S、T。像这样：

Character A, No of Occurences = 2
Character F, No of Occurences = 1
Character I, No of Occurences = 1
Character L, No of Occurences = 1
Character S, No of Occurences = 1
Character T, No of Occurences = 2

正如我之前提到的，字母应该是：

AĄBCČDEĘĖFGHIĮYJKLMNOPRSŠTUŲŪVZŽ

此外，当我打开 rezultatai.txt 文件检查附加值时，它只包含一长列数字：

Answer 1

However, somehow it returns only output with letters A, F, I, L, S, T. Like this:

foreach (char c in failas)

您遍历 文件名，即 "failas.txt"，这应该是实际文件的文本。

foreach (char c in rodymas)
foreach (char c in masyvas)  // Possibly the char array.. not sure which..

Also, when I open rezultatai.txt file to check appended values, it only contains a long column of numbers:

是的，您附加了 KeyValuePair 中的值，其中值是一个整数，这大概需要与您输出到控制台的值相同。

Answer 2

.NET 具有非常强大的功能，如 LINQ 和 CultureInfo 系统。您可以在几行中使用两者来完成此操作：

using System;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;

internal class Program
{
  private static void Main()
  {
    var cultureLithunia = new CultureInfo("lt-LT");
    var textInfoLithunia = cultureLithunia.TextInfo;

    string requested = textInfoLithunia.ToUpper("AĄBCČDEĘĖFGHIĮYJKLMNOPRSŠTUŲŪVZŽ");

    string content = File.ReadAllText("failas.txt", Encoding.GetEncoding(textInfoLithunia.ANSICodePage));

    var characters = content.GroupBy(c => c);

    var charactersYouWant = characters.Where(c => requested.Contains(textInfoLithunia.ToUpper(c.Key)));

    var linesYouWantToOutput = charactersYouWant.Select(c => string.Format("Character {0}, No of Occurences = {1}", c.Key, c.Count()));

    File.WriteAllLines("rezultatai.txt", linesYouWantToOutput);

    Console.WriteLine("Done");
    Console.ReadKey();
  }
}

如果你想要所需文本中的所有字符，那就有点复杂了：

using System;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;

internal class Program
{
  private static void Main()
  {
    var cultureLithunia = new CultureInfo("lt-LT");
    var textInfoLithunia = cultureLithunia.TextInfo;

    string requested = textInfoLithunia.ToUpper("AĄBCČDEĘĖFGHIĮYJKLMNOPRSŠTUŲŪVZŽ");

    string content = File.ReadAllText("failas.txt", Encoding.GetEncoding(textInfoLithunia.ANSICodePage));

    var characters = content.GroupBy(c => c);

    var charactersYouWant = requested.Select(c => new { Key = c, Count = characters.Where(cc => textInfoLithunia.ToUpper(cc.Key) == c).Select(group => group.Count()).FirstOrDefault() });

    var linesYouWantToOutput = charactersYouWant.Select(c => string.Format("Character {0}, No of Occurences = {1}", c.Key, c.Count));

    File.WriteAllLines("rezultatai.txt", linesYouWantToOutput);

    Console.WriteLine("Done");
    Console.ReadKey();
  }
}

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