C# 在您的应用程序的位置保存文件

Question

我正在尝试保存到这样的文件中：

    string path = AppDomain.CurrentDomain.BaseDirectory;
    fs = new System.IO.FileStream(path, System.IO.FileMode.Append, System.IO.FileAccess.Write);

但是我得到 DirectoryNotFoundException 尽管目录存在。

方法在这里

public static void WriteToFile(string s)
{
    string path = AppDomain.CurrentDomain.BaseDirectory;
    fs = new System.IO.FileStream(path, System.IO.FileMode.Append, System.IO.FileAccess.Write);
    sw = new System.IO.StreamWriter(fs);
    sw.WriteLine(s);
    sw.Flush();
    sw.Close();
    fs.Close();
}

我不确定为什么会这样。谢谢

Answer 1

您需要指定文件名，仅目录不足以创建文件:

public static void WriteToFile(string s, string fileName)
{
    string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, fileName);
    fs = new System.IO.FileStream(path, System.IO.FileMode.Append, System.IO.FileAccess.Write);
    sw = new System.IO.StreamWriter(fs);
    sw.WriteLine(s);
    sw.Flush();
    sw.Close();
    fs.Close();
}

用法：

WriteToFile("Some Text To Write", "SampleFileName.txt");

这里是文档：

public FileStream(string path, FileMode mode, FileAccess access);

Parameters: path: A relative or absolute path for the file that the current FileStream object will encapsulate.

Answer 2

你的'路径是一个目录，但是System.IO.FileStream.FileStream(string path, FileMode mode, FileAccess access)需要一个文件路径，所以我修改你的代码如下:

public static void WriteToFile(string s)
    {
        string path = AppDomain.CurrentDomain.BaseDirectory + "a.txt";
        var fs = new System.IO.FileStream(path, System.IO.FileMode.Append, System.IO.FileAccess.Write);
        var sw = new System.IO.StreamWriter(fs);
        sw.WriteLine(s);
        sw.Flush();
        sw.Close();
        fs.Close();
        Console.WriteLine(path);
        Console.ReadKey();
    }

输出： d:\users\zwguo\documents\visual工作室2013\Projects\ConsoleApplication15\Consol eApplication15\bin\Debug\a.txt

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