C＃：在具有DirectoryInfo的目录中创建一个新的FileInfo [英] C#: Creating a new FileInfo in a directory that you have the DirectoryInfo of

问题描述

我只是想知道你有什么例子：

I was just wondering when you have for example:

var dir = new DirectoryInfo(@"C:\Temp");

有没有比这更容易/更清晰的方式添加到该目录的新文件？

Is there an easier/clearer way to add a new file to that directory than this?

var file = new FileInfo(Path.Combine(dir.FullName, "file.ext"));

我想我可能只是做一个扩展方法或东西，但好奇，如果已经存在这不能看到这里...我的意思是 DirectoryInfo 有 GetFiles（）方法，例如。 p>

I'm thinking I can probably just make an extension method or something, but curious if something already exists that can't see here... I mean the DirectoryInfo does have GetFiles() method for example.

推荐答案

你想做什么？标题说创建新文件。 FileInfo对象不是文件;它是一个保存有关文件的信息的对象（可能存在或可能不存在）。如果你真的想要创建文件，那么有很多方法可以这样做。最简单的方法之一是：

What is it that you want to do? The title says "Creating a new file". A FileInfo object is not a file; it's an object holding information about a file (that may or may not exist). If you actually want to create the file, there are a number of ways of doing so. One of the simplest ways would be this:

File.WriteAllText(Path.Combine(dir.FullName, "file.ext"), "some text");

如果要根据 FileInfo object，可以使用以下方法：

If you want to create the file based on the FileInfo object instead, you can use the following approach:

var dir = new DirectoryInfo(@"C:\Temp");
var file = new FileInfo(Path.Combine(dir.FullName, "file.ext"));
if (!file.Exists) // you may not want to overwrite existing files
{
    using (Stream stream = file.OpenWrite())
    using (StreamWriter writer = new StreamWriter(stream))
    {
        writer.Write("some text");
    }
}

作为附注：它是 dir.FullName ，而不是 dir.FullPath 。

As a side note: it is dir.FullName, not dir.FullPath.

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