Question

以下代码不会写入文本文件。根据我的知识，不确定为什么，正如我完全按照我的书。运行时不会抛出任何错误，程序运行成功。文件路径正确，提到的文件当前未打开

String databasePath = "C:\\Users\\Dalton.Riera\\Downloads\\Summer Program Practice 0 Solution Extr\\Summer Program Practice 0 Solution\\DataBase.txt";
StreamWriter Writer = new StreamWriter(new FileStream(databasePath, 
    FileMode.Append, FileAccess.Write));
Writer.WriteLine("Test");
Console.ReadKey();
Writer.Close();

Answer 1

如果你想追加，只需AppendAllText：

   string databasePath = "C:\\Users\\Dalton.Riera\\Downloads\\Summer Program Practice 0 Solution Extr\\Summer Program Practice 0 Solution\\DataBase.txt";

   File.AppendAllText(databasePath, "Test");

如果您坚持Writer在 Console.ReadKey之前关闭它（当您检查文件时）

// first write into the file //DONE: do not close IDisposable explicitly, but wrap them into "using" using (StreamWriter Writer = new StreamWriter( new FileStream(databasePath, FileMode.Append, FileAccess.Write))) { Writer.WriteLine("Test"); } // ... then stop and check file's content Console.ReadKey();

Answer 2

Console.ReadKey();
Writer.Close();

请在Console.ReadKey();之后移动Writer.Close();行。函数 ReadKey 保存执行，并且除非调用 Write.Close 函数，否则不会将内容写入文件。所以你的代码应该是这样的：

String databasePath = "C:\\Users\\Dalton.Riera\\Downloads\\Summer Program Practice 0 Solution Extr\\Summer Program Practice 0 Solution\\DataBase.txt";
StreamWriter Writer = new StreamWriter(new FileStream(databasePath,
FileMode.Append, FileAccess.Write));
Writer.WriteLine("Test");

Writer.Close();
Console.ReadKey();

Answer 3

虽然您的代码应该按照书面形式运行，但可能存在缓存问题：

我建议您在writer.Flush()之前添加writer.Close()。

除此之外，您应该using StreamWriter而不仅仅是创建它以确保它被正确处理。

组合这两点将呈现以下代码：

    String databasePath = "C:\\Users\\Dalton.Riera\\Downloads\\Summer Program Practice 0 Solution Extr\\Summer Program Practice 0 Solution\\DataBase.txt";
    using (StreamWriter writer = new StreamWriter(new FileStream(databasePath, 
        FileMode.Append, FileAccess.Write)))
    {
        writer.WriteLine("Test");
        Console.ReadKey();
        writer.Flush();
        //writer.Close(); this may or may not be needed.
    }

无法在C＃中写入我的文本文件

3 个答案: