打开文本文件，遍历内容并检查 [英] Open text file, loop through contents and check against

问题描述

所以我有一个我正在尝试实施的通用数字检查:

So I have a generic number check that I am trying to implement:

    public static bool isNumberValid(string Number)
    {
    }

我想读取文本文件的内容(仅包含数字)并检查每一行的数字并使用 isNumberValid 验证它是有效数字.然后我想将结果输出到一个新的文本文件，我到此为止:

And I want to read the contents of a textfile (only contains numbers) and check each line for the number and verify it is the valid number using isNumberValid. Then I want to output the results to a new textfile, I got this far:

    private void button2_Click(object sender, EventArgs e)
    {
        int size = -1;
        DialogResult result = openFileDialog1.ShowDialog(); // Show the dialog.
        if (result == DialogResult.OK) // Test result.
        {
            string file = openFileDialog1.FileName;
            try
            {
                string text = File.ReadAllText(file);
                size = text.Length;
                using (StringReader reader = new StringReader(text))
                {

                        foreach (int number in text)
                        {
                            // check against isNumberValid
                            // write the results to a new textfile 
                        }
                    }
                }

            catch (IOException)
            {
            }
        }
    }

如果有人可以提供帮助，是否会被困在这里?

Kind of stuck from here if anyone can help?

文本文件在列表中包含多个数字:

The textfile contains several numbers in a list:

4564

4565

4455

等

我想写的新文本文件只是在末尾附加真或假的数字:

The new textfile I want to write would just be the numbers with true or false appended to the end:

4564 真

推荐答案

你可以试试这个，以保持你最初遵循的模式......

You could try this to keep with the pattern you were initially following...

private void button1_Click(object sender, EventArgs e)
{
    DialogResult result = openFileDialog1.ShowDialog(); // Show the dialog.
    if (result == DialogResult.OK) // Test result.
    {
        string file = openFileDialog1.FileName;
        try
        {
            using (var reader = new StreamReader(file))
            {
                using (var writer = new StreamWriter("results.txt"))
                {
                    string currentNumber;
                    while ((currentNumber = reader.ReadLine()) != null)
                    {
                        if (IsNumberValid(currentNumber))
                            writer.WriteLine(String.Format("{0} true", currentNumber));
                    }
                }
            }
        }

        catch (IOException)
        {
        }
    }
}

public bool IsNumberValid(string number)
{
    //Whatever code you use to check your number
}

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