需要一些帮助才能创建文件和字符串搜索引擎。 程序需要让用户输入文件名，然后输入搜索字符串的名称，打印搜索结果文件，存储它然后询问用户是否需要其他选择。 这就是我到目前为止所做的：
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.IO;
public class SwitchTest
{
private const int tabSize = 4;
private const string usageText = "Usage: INSERTTABS inputfile.txt outputfile.txt";
public static void Main(string[] args)
{
string userinput;
Console.WriteLine("Please enter the file to be searched");
userinput = Console.ReadLine();
using (StreamReader reader = new StreamReader("test.txt"))
{
//Read the file into a stringbuilder
StringBuilder sb = new StringBuilder();
sb.Append(reader.ReadToEnd());
Console.ReadLine();
}
{
StreamWriter writer = null;
if (args.Length < 2)
{
Console.WriteLine(usageText);
return;
}
try
{
// Attempt to open output file.
writer = new StreamWriter(args[1]);
// Redirect standard output from the console to the output file.
Console.SetOut(writer);
// Redirect standard input from the console to the input file.
Console.SetIn(new StreamReader(args[0]));
}
catch (IOException e)
{
TextWriter errorWriter = Console.Error;
errorWriter.WriteLine(e.Message);
errorWriter.WriteLine(usageText);
return;
}
writer.Close();
// Recover the standard output stream so that a
// completion message can be displayed.
StreamWriter standardOutput = new StreamWriter(Console.OpenStandardOutput());
standardOutput.AutoFlush = true;
Console.SetOut(standardOutput);
Console.WriteLine("COMPLETE!", args[0]);
return;
}
}
}
我对编程很垃圾，所以用术语xD
保持简单答案 0 :(得分：1)
我真的不知道你想要什么，但如果你想在文件中搜索字符串的所有出现，并想要返回位置（行和列），那么这可能会有所帮助：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
namespace CS_TestApp
{
class Program
{
struct Occurrence
{
public int Line { get; set; }
public int Column { get; set; }
public Occurrence(int line, int column) : this()
{
Line = line;
Column = column;
}
}
private static string[] ReadFileSafe(string fileName)
{
// If the file doesn't exist
if (!File.Exists(fileName))
return null;
// Variable that stores all lines from the file
string[] res;
// Try reading the entire file
try { res = File.ReadAllLines(fileName, Encoding.UTF8); }
catch (IOException) { return null; }
catch (ArgumentException) { return null; }
return res;
}
private static List<Occurrence> SearchFile(string[] file, string searchString)
{
// Create a list to store all occurrences of substring in the file
List<Occurrence> occ = new List<Occurrence>();
for (int i = 0; i < file.Length; i++) // Loop through all lines
{
string line = file[i]; // Save the line
int totalIndex = 0; // The total index
int index = 0; // The relative index (the index found AFTER totalIndex)
while (true) // Loop until breaks
{
index = line.IndexOf(searchString); // Search for the index
if (index >= 0) // If a string was found
{
// Save the occurrence to our list
occ.Add(new Occurrence(i, totalIndex + index));
totalIndex += index + searchString.Length; // Add the total index and the searchString
line = line.Substring(index + searchString.Length); // Cut of the searched part
}
else break; // If no more occurances found
}
}
// Here we have our list filled up now we can return it
return occ;
}
private static void PrintFile(string[] file, List<Occurrence> occurences, string searchString)
{
IEnumerator<Occurrence> enumerator = occurences.GetEnumerator();
enumerator.MoveNext();
for (int i = 0; i < file.Length; i++)
{
string line = file[i];
int cutOff = 0;
do
{
if (enumerator.Current.Line == i)
{
Console.Write(line.Substring(0, enumerator.Current.Column - cutOff));
Console.ForegroundColor = ConsoleColor.Red;
Console.Write(searchString);
Console.ResetColor();
line = line.Substring(enumerator.Current.Column + searchString.Length - cutOff);
cutOff = enumerator.Current.Column + searchString.Length;
}
else break;
}
while (enumerator.MoveNext());
Console.WriteLine(line); // Write the rest
}
}
private static bool WriteToFile(string file, List<Occurrence> occ)
{
StreamWriter sw;
try { sw = new StreamWriter(file); }
catch (IOException) { return false; }
catch (ArgumentException) { return false; }
try
{
foreach (Occurrence o in occ)
{
// Write all occurences
sw.WriteLine("(" + (o.Line + 1).ToString() + "; " + (o.Column + 1).ToString() + ")");
}
return true;
}
finally
{
sw.Close();
sw.Dispose();
}
}
static void Main(string[] args)
{
bool anotherFile = true;
while (anotherFile)
{
Console.Write("Please write the filename of the file you want to search: ");
string file = Console.ReadLine();
Console.Write("Please enter the string to search for: ");
string searchString = Console.ReadLine();
string[] res = ReadFileSafe(file); // Call our search method
if (res == null) // If it either couldn't open the file, or the file didn't exist
Console.WriteLine("Couldn't open the read file.");
else // If the file was opened
{
Console.WriteLine();
Console.WriteLine("File:");
Console.WriteLine();
List<Occurrence> occ = SearchFile(res, searchString); // Search the file
PrintFile(res, occ, searchString); // Print the result
Console.WriteLine();
Console.Write("Please enter the file you want to write the output to: ");
file = Console.ReadLine();
if (!WriteToFile(file, occ))
Console.WriteLine("Couldn't write output.");
else
Console.WriteLine("Output written to: " + file);
Console.WriteLine();
}
Pause("continue");
requestAgain:
Console.Clear();
Console.Write("Do you want to search another file (Y/N): ");
ConsoleKeyInfo input = Console.ReadKey(false);
char c = input.KeyChar;
if(c != 'y' && c != 'Y' && c != 'n' && c != 'N')
goto requestAgain;
anotherFile = (c == 'y' || c == 'Y');
if(anotherFile)
Console.Clear();
}
}
private static void Pause(string action)
{
Console.Write("Press any key to " + action + "...");
Console.ReadKey(true);
}
}
}
答案 1 :(得分：0)
嗯，实际上我还没理解你在问什么。您是否尝试将某些文本搜索到指定的文件中，然后写出文本的位置？
如果是，请尝试查看：
while (true)
{
Console.Write("Path: ");
string path = Console.ReadLine();
Console.Write("Text to search: ");
string search = Console.ReadLine();
if (string.IsNullOrWhiteSpace(path) || string.IsNullOrWhiteSpace(search))
{
break;
}
if (!File.Exists(path))
{
Console.WriteLine("File doesn't exists!");
continue;
}
int index = File.ReadAllText(path).IndexOf(search);
string output = String.Format("Searched Text Position: {0}", index == -1 ? "Not found!" : index.ToString());
File.WriteAllText("output.txt", output);
Console.WriteLine("Finished! Press enter to continue...");
Console.ReadLine();
Console.Clear();
}