如何在文本文件中顯示字符串？ （C＃控制台應用程序）

Question

因此，我發現了如何顯示輸入字符串的出現次數，但是我不知道如何顯示單詞的外觀以及該單詞所在的句子。例如，我的輸入字符串是“ the”，但是如何將其顯示為The或THE或在控制台上枯萎？ 此外，如何顯示輸入字符串及其所在的句子？ 例如：“ the”，句子：干旱使公共汽車枯萎了。

這是我到目前為止的代碼：

static void Main(string[] args)
    {
        string line;
        int counter = 0;

        Console.WriteLine("Enter a word to search for: ");
        string userText = Console.ReadLine();

        string file = "Gettysburg.txt";
        StreamReader myFile = new StreamReader(file);

        int found = 0;

        while ((line = myFile.ReadLine()) != null)
        {
            counter++;
            if (line.IndexOf(userText, StringComparison.CurrentCultureIgnoreCase) != -1)
            {
                Console.WriteLine("Found on line number: {0}", counter);
                found++;
            }
        }
        Console.WriteLine("A total of {0} occurences found", found);
    }

Answer 1

如何更改一行：

Console.WriteLine("Line {0}: {1}", counter,line);

順便說一句，我不太理解您的問題，“將其顯示為The或THE或在控制台上枯萎”，以及“顯示此輸入字符串及其所在的句子”是什么意思？

Answer 2

聽起來您想擁有觸發比賽的單詞，即使它只是比賽的一部分。

while ((line = myFile.ReadLine()) != null)
{
    counter++;
    int index = line.IndexOf(userText, StringComparison.CurrentCultureIgnoreCase);
    if (index != -1)
    {
        //Since we want the word that this entry is, we need to find the space in front of this word
        string sWordFound = string.Empty;
        string subLine = line.Substring(0, index);
        int iWordStart = subLine.LastIndexOf(' ');
        if (iWordStart == -1)
        {
            //If there is no space in front of this word, then this entry begins at the start of the line
            iWordStart = 0;
        }

        //We also need to find the space after this word
        subLine = line.Substring(index);
        int iTempIndex = subLine.LastIndexOf(' ');
        int iWordLength = -1;
        if (iTempIndex == -1)
        {    //If there is no space after this word, then this entry goes to the end of the line.
            sWordFound = line.Substring(iWordStart);
        }
        else
        {
            iWordLength = iTempIndex + index - iWordStart;
            sWordFound = line.Substring(iWordStart, iWordLength);
        }

        Console.WriteLine("Found {1} on line number: {0}", counter, sWordFound);
        found++;
    }
}

這可能有錯誤，但應將您推向正確的方向。 此外，如果您包含預期的輸出，則對您的示例也將有所幫助。

這是我對這段代碼的期望：

input:
The drought withered the bus.
Luke's father is well known.
The THE ThE

output:
Found The on line number: 1
Found withered on line number: 1
Found the on line number: 1
Found father on line number: 2
Found The on line number: 3
Found THE on line number: 3
Found ThE on line number: 3