如何在.NET中使用Encoding.Default？ [英] How does Encoding.Default work in .NET?

问题描述

  var source = File.ReadAllText（path）; 
  

和角色©不是正确加载

然后，我将其更改为：

  var source = File .ReadAllText（path，Encoding.UTF8）; 
  

没有任何内容。

我决定尝试使用

  var source = File.ReadAllText（path，Encoding.Default）; 
  

它运行良好。
然后我调试它，并尝试找到哪个Encoding做了诀窍，我发现它是 UTF-7 。

我想知道的是：

建议使用 Encoding.Default 并且它可以保证文件的所有字符都将被读取没有问题吗？

解决方案

Encoding.Default将仅保证所有UTF -7字符集将被正确读取（google为整个集合）。另一方面，如果您尝试以UTF-8模式读取未以UTF-8编码的文件，那么您将收到像您一样损坏的字符。

例如，如果文件被编码为UTF-16，并且如果您以UTF-16模式读取文件，即使该文件不包含单个UTF-16特定字符，您也可以使用。所有这些都归结为文件的编码。

您需要使用相同的编码进行保存重新打开的东西，以防止损坏。否则，尝试尽可能多地使用UTF-7，因为它是最紧凑的电子邮件安全编码可能，这就是为什么在大多数.NET框架设置中是默认的。

I'm reading a file using:

var source = File.ReadAllText(path);

and the character © wasn't being loaded correctly.

Then, I changed it to:

var source = File.ReadAllText(path, Encoding.UTF8);

and nothing.

I decided to try using

var source = File.ReadAllText(path, Encoding.Default);

and it worked perfectly. Then I debugged it and tried to find which Encoding did the trick, and I found that it was UTF-7.

What I want to know is:

Is it recommended to use Encoding.Default, and can it guarantee all the characters of the file will be read without problems?

解决方案

Encoding.Default will only guarantee that all UTF-7 character sets will be read correctly (google for the whole set). On the other hand, if you try to read a file not encoded with UTF-8 in the UTF-8 mode, you'll get corrupted characters like you did.

For instance if the file is encoded UTF-16 and if you read it in UTF-16 mode, you'll be fine even if the file does not contain a single UTF-16 specific character. It all boils down to the file's encoding.

You'll need to do the save - reopen stuff with the same encoding to be safe from corruptions. Otherwise, try to use UTF-7 as much as you can since it is the most compact yet 'email safe' encoding possible, which is why it is default in most .NET framework setups.

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