我如何自动删除在C＃中临时文件？ [英] How do I automatically delete tempfiles in c#?

问题描述

结果
有什么保证，如果我的应用程序关闭或崩溃一个临时文件被删除的好办法？理想情况下，我想获得一个临时文件，使用它，然后忘掉它。

What are a good way to ensure that a tempfile is deleted if my application closes or crashes? Ideally I would like to obtain a tempfile, use it and then forget about it.

现在我把我的临时文件的列表，并与触发的事件处理程序删除Application.ApplicationExit。

Right now I keep a list of my tempfiles and delete them with an eventhandler that triggers on Application.ApplicationExit.

有没有更好的办法？

推荐答案

如果进程过早杀死任何保证，但是，我用使用要做到这一点..

Nothing is guaranteed if the process is killed prematurely, however, I use "using" to do this..

using System;
using System.IO;
sealed class TempFile : IDisposable
{
    string path;
    public TempFile() : this(System.IO.Path.GetTempFileName()) { }

    public TempFile(string path)
    {
        if (string.IsNullOrEmpty(path)) throw new ArgumentNullException("path");
        this.path = path;
    }
    public string Path
    {
        get
        {
            if (path == null) throw new ObjectDisposedException(GetType().Name);
            return path;
        }
    }
    ~TempFile() { Dispose(false); }
    public void Dispose() { Dispose(true); }
    private void Dispose(bool disposing)
    {
        if (disposing)
        {
            GC.SuppressFinalize(this);                
        }
        if (path != null)
        {
            try { File.Delete(path); }
            catch { } // best effort
            path = null;
        }
    }
}
static class Program
{
    static void Main()
    {
        string path;
        using (var tmp = new TempFile())
        {
            path = tmp.Path;
            Console.WriteLine(File.Exists(path));
        }
        Console.WriteLine(File.Exists(path));
    }
}

现在当临时文件被处置，或者垃圾收集被删除的文件（如果可能）。你可以明显地将此作为紧密范围，只要你喜欢，或在某处集合

Now when the TempFile is disposed or garbage-collected the file is deleted (if possible). You could obviously use this as tightly-scoped as you like, or in a collection somewhere.

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