Question

所以基本上我要做的是一个控制台程序，当你插入一个字符串（一个文件的路径为ex：C：\ Text.txt）时，它会返回带扩展名的完整路径（这个部分工作）然后它将返回该文件的内容，然后要求您插入一个字符在该Text.txt文件中搜索。从文本文件读取的部分工作昨天，但现在不再工作，也是字符搜索不起作用。我想要做的是基本上搜索该文件中的特定字符（例如字符'a'（从键盘插入），然后计算它在Text.txt中的次数因为某些原因，我无法显示Text.txt文件的内容，并且出现次数也不起作用。请帮助我，我花了很多时间在这上面，它不起作用:(。Ty

以下是整个代码：

using System;
using System.Collections;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApplication1
{
   class GetStatistics
   {
    public String GetFileDetails(String PathS)
    {
        String Space = " ";
        Console.WriteLine("Absolute: " + Path.IsPathRooted(PathS));
        Console.WriteLine("Root: " + Path.GetPathRoot(PathS));
        Console.WriteLine("Directory: " + Path.GetDirectoryName(PathS));
        Console.WriteLine("File name: " + Path.GetFileName(PathS));
        if (Path.HasExtension(PathS))
            Console.WriteLine("Extension: " + Path.GetExtension(PathS));
        Console.WriteLine("Full path: " + PathS);

        return Space;
    }

    public String ReadFromFile(String PathS)
    {
        String Extra = "\n***************************\n";
        Console.WriteLine(Extra);

        int counter = 0;
        string line;
        System.IO.StreamReader file = new System.IO.StreamReader(PathS);
        while ((line = file.ReadLine()) != null)
        {
            Console.WriteLine(line);
            counter++;
        }


        String CharacterSearch;
        CharacterSearch = Console.ReadLine();
        var count = File.ReadLines(PathS)
            .Select((c, i) => new { Character = c, Index = i })
            .ToList()
            .Where(x => x.Character == CharacterSearch);
        file.Close();
        return Extra;
    }



}
class Program
{
    static void Main(string[] args)
    {
        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine("Introduceti un path pentru fisierul text care vreti sa il deschideti: ");
        String PathS = Console.ReadLine();
        GetStatistics G = new GetStatistics();
        Console.WriteLine(G.GetFileDetails(PathS));
        Console.WriteLine(G.ReadFromFile(PathS));
    }
}

}

问题在于ReadFromFile。

Answer 1

x.Character == CharacterSearch

它与其中一部分的字符串不匹配，因为我与整行匹配。

如果您检查它是否包含在该行中。

应该是

x.Character.Contains(CharacterSearch)

匹配次数（IEnumerable <String>）也是count.Count()

我认为显示我需要的跟踪号的部分。

Console.WriteLine("count:{0}", count.Count());

注意：这不是字符串出现的次数，因为它是匹配的行。

用于计算字符

String CharacterSearch;
CharacterSearch = Console.ReadLine();
var count = File.ReadLines(PathS)
    .Select((String s) => { return  s.Length - s.Replace(CharacterSearch, "").Length; })
    .Sum();
file.Close();
Console.WriteLine("count:{0}", count);
return Extra;

单词和字符

.Select((s) => { return  (s.Length - s.Replace(CharacterSearch, "").Length)/CharacterSearch.Length; })

Answer 2

基本上你没有返回字符搜索计数的计数

试一试：添加此方法

       int getCharCount(String PathS)        
        {
            Console.WriteLine("Enter Char to be searched!");
            char CharacterSearch = Console.ReadKey().KeyChar;
            Console.ReadLine();
            int count = 0;
            String content=File.ReadAllText(PathS);
            for (int i = 0; i < content.Length; i++)
            {

                if (content[i].ToString().ToLower().Equals(CharacterSearch.ToString().ToLower()))
                    count++;
            }
            return count;
        }
class Program
{
static void Main(string[] args)
{
    Console.ForegroundColor = ConsoleColor.Green;
    Console.WriteLine("Introduceti un path pentru fisierul text care vreti sa il deschideti: ");
    String PathS = Console.ReadLine();
    GetStatistics G = new GetStatistics();
    Console.WriteLine(G.GetFileDetails(PathS));
    Console.WriteLine(G.ReadFromFile(PathS));
    Console.WriteLine("Serch Count ="+G.getCharCount(PathS));
}
}

C＃从键盘打开文本文件并获取字符

2 个答案: