C＃從Windows窗體打印到文本文件

Question

我能夠獲得此代碼以在控制台應用程序中工作，但當前正在Windows窗體中工作。 我將輸出更改為控制台應用程序，但這仍然無法正常工作。

        string path = @"C:\Users\rbc658\Trajectory.txt";
        if (!File.Exists(path))
        {
            File.Create(path);
            TextWriter txt = new StreamWriter(path);
            txt.WriteLine("Hello");
            txt.Close();
        }
        else if (File.Exists(path))
        {
            using (var txt = new StreamWriter(path, true))
            {
                txt.WriteLine("Hello");
                txt.Close();
            }
        }

“關閉”，“創建”和“寫行”未像上面的文本中突出顯示。 我正在使用system.io。 表單和控制台應用程序有什么不同之處會阻止其工作？

Answer 1

對於您來說，創建一個函數來向文本文件中寫入內容的調用更為優雅

下面的代碼為我工作：

    private void Form1_Load(object sender, EventArgs e) // for example run this code when form loads
    {
        string path = @"C:\Users\Luka\Desktop\Trajectory.txt"; // your path to a text file
        string text = "Hello"; // some text to write to a text file
        Write(text, path, File.Exists(path)); // we are passing File.Exists(path) as a boolean to see wether or not to append text to a file
    }
    private void Write(string text, string path, bool file_exists)
    {
        //if File.Exists(path) is true, streamwriters second argument is true, so it appends
        //else the argument is false and it does not append
        StreamWriter txt = new StreamWriter(path, file_exists); // creates new object type StreamWriter with 2 arguments
        //1. path to a file
        //2. boolean to see wether or not to append the text to a file
        txt.WriteLine(text); // writes text line to a file
        txt.Dispose(); // disposes streamwriter
    }

所有解釋都顯示為代碼中的注釋，因此您可以在測試程序時將其復制。