地带字节顺序标记在C＃中的字符串 [英] Strip Byte Order Mark from string in C#

问题描述

我读过这个相近岗位，他们不回答我的问题。

I've read similar posts on this and they don't answer my question.

在C＃中，我有我从WebClient.DownloadString获得的字符串。我试过设置client.Encoding新的UTF8Encoding（假），但是这并没有区别 - 我还是结束了一个字节顺序标记为UTF-8的结果字符串的开头。我需要删除此（来解析与LINQ生成的XML），并希望在内存中这样做。

In C#, I have a string that I'm obtaining from WebClient.DownloadString. I've tried setting client.Encoding to new UTF8Encoding(false), but that's made no difference - I still end up with a byte order mark for UTF-8 at the beginning of the result string. I need to remove this (to parse the resulting XML with LINQ), and want to do so in memory.

所以我必须与\\ x00EF \\ x00BB \\ x00BF开头的字符串，我想删除，如果它的存在。现在，我使用

So I have a string that starts with \x00EF\x00BB\x00BF, and I want to remove that if it exists. Right now I'm using

if (xml.StartsWith(ByteOrderMarkUtf8))
{
    xml = xml.Remove(0, ByteOrderMarkUtf8.Length);
}

但只是觉得不妥。我已经试过各种code与流，GetBytes会和编码，并没有什么作品。任何人都可以提供正确的算法从一个字符串中去除BOM的？

but that just feels wrong. I've tried all sorts of code with streams, GetBytes, and encodings, and nothing works. Can anyone provide the "right" algorithm to strip a BOM from a string?

感谢您！

推荐答案

如果变量XML字符串类型的，你做已经有点问题 - 在一个字符串，该BOM不宜再presented三个独立的字符，但作为一个单一的code点。而不是使用DownloadString，请使用DownloadData，并解析字节数组来代替。 XML解析器应该认识到BOM本身，并跳过它（除自动检测文档编码为UTF-8）。

If the variable xml is of type string, you did something wrong already - in a character string, the BOM should not be represented as three separate characters, but as a single code point. Instead of using DownloadString, use DownloadData, and parse byte arrays instead. The XML parser should recognize the BOM itself, and skip it (except for auto-detecting the document encoding as UTF-8).

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