使用 C# 将文本文件从 ANSI 转换为 ASCII
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Converting text file from ANSI to ASCII using C#
提问by BDeveloper
I have an ANSI-encoded file, and I want to convert the lines I read from the file to ASCII.
我有一个 ANSI 编码的文件，我想将从文件中读取的行转换为 ASCII。
How do I go about doing this in C#?
我如何在 C# 中做到这一点？
EDIT :What if i used "BinaryReader"
BinaryReader reader = new BinaryReader(input, Encoding.Default);but this reader takes (Stream, Encoding)
but "Stream" is an abstract! And where should I put the path of the file which he will read from ?
编辑：如果我使用“BinaryReader”BinaryReader reader = new BinaryReader(input, Encoding.Default);但这个阅读器采用（流，编码）但“流”是一个抽象怎么办
！我应该在哪里放置他将从中读取的文件的路径？
采纳答案by Can Berk Güder
A direct conversion from ANSI to ASCII might not always be possible, since ANSI is a superset of ASCII.
从 ANSI 到 ASCII 的直接转换可能并不总是可行，因为 ANSI 是 ASCII 的超集。
You can try converting to UTF-8 using Encoding, though:
不过，您可以尝试使用 转换为 UTF-8 Encoding：
Encoding ANSI = Encoding.GetEncoding(1252);
byte[] ansiBytes = ANSI.GetBytes(str);
byte[] utf8Bytes = Encoding.Convert(ANSI, Encoding.UTF8, ansiBytes);
String utf8String = Encoding.UTF8.GetString(utf8Bytes);
Of course you can replace UTF8 with ASCII, but that doesn't really make sense since:
当然，您可以用 ASCII 替换 UTF8，但这实际上没有意义，因为：
- if the original string doesn't contain any byte > 126, then it's already ASCII
- if the original string does contain one or more bytes > 126, then those bytes will be lost
- 如果原始字符串不包含任何大于 126 的字节，则它已经是 ASCII
- 如果原始字符串确实包含一个或多个大于 126 的字节，则这些字节将丢失
UPDATE:
更新：
In response to the updated question, you can use BinaryReaderlike this:
针对更新后的问题，您可以这样使用BinaryReader：
BinaryReader reader = new BinaryReader(File.Open("foo.txt", FileMode.Open),
Encoding.GetEncoding(1252));
回答by Marc Gravell
Basically, you need to specify an Encodingwhen reading/writing the file. For example:
基本上，您需要Encoding在读取/写入文件时指定一个。例如：
// read with the **local** system default ANSI page
string text = File.ReadAllText(path, Encoding.Default);
// ** I'm not sure you need to do this next bit - it sounds like
// you just want to read it? **
// write as ASCII (if you want to do this)
File.WriteAllText(path2, text, Encoding.ASCII);
Note that once you have read it, textis actually unicode when in memory.
请注意，一旦您阅读了它，text实际上是在内存中的 unicode。
You can choose different code-pages using Encoding.GetEncoding.
您可以使用 选择不同的代码页Encoding.GetEncoding。
