c＃hex byte 0x09（ascii - > tab）to“\t”串 [英] c# hex byte 0x09 (ascii -> tab) to "\t" string

问题描述

我需要到一个文本文件的字节数组转换成它的字符串的字符表示。

I need to convert a byte array of a text file to it's string character representation.

例如，如果我有了一个文本文件：

For example, if I have a text file that has:

您好（标签）有（新行）朋友

hello (tab) there (newline) friend

我想将其转换成一个数组：

I would like to convert that to an array:

my_array  = {'h', 'e' ,'l','l','o', '\t', 't', 'h','e','r','e', '\r','\n', 'f', 'r' ,'i','e','n', 'd'};

我在与转换控制字符转义的字符串，麻烦即：

I'm having trouble with converting the control characters to their escaped strings, i.e.:

• ×09 ='\t';


• 0X0D ='\r';


• 的0x0A ='\\\
  ';

我已经试过这一点，但制表符和新行不在这里代表：

I have tried this, but the tabs and new lines aren't represented here:

byte[] text_bytes = File.ReadAllBytes("ok.txt");
char[] y = Encoding.ASCII.GetChars(text_bytes);

我知道我可以通过每个字节的循环，并有一个条件，寻找×09 ，如果我找到它，然后用\t更换，但我不知道是否有内置的东西。

I know I can just loop through each byte and have a condition to look for 0x09 and if I find it, then replace with "\t", but I'm wondering if there is something built in.

推荐答案

有几种方法可以做到这一点。最简单的将是整个文件加载到内存中：

There are several ways you could do it. The simplest would be to load the entire file into memory:

string theText = File.ReadAllText(filename);

然后使用与string.replace 来代替你感兴趣的内容：

Then use string.Replace to replace the items you're interested in:

// "escaping" the '\t' with '\\t' makes it write the literal characters '\' and 't'
theText = theText.Replace("\t", "\\t");

theText = theText.Replace("\r", "\\r");
theText = theText.Replace("\n", "\\n");

然后，你可以创建你的字符数组。如果你确定它的所有ASCII文本，你可以使用 Encoding.ASCII ：

byte[] theChars = Encoding.ASCII.GetBytes(theText);

或者，如果你想要一个字符数组：

Or, if you want a character array:

char[] theChars = theText.ToCharArray();

这可能将是足够快的目的。您也许能够通过通过字符串单传，由性格和复制到的StringBuilder 读取字符以加快其速度：

That's probably going to be fast enough for your purposes. You might be able to speed it up by making a single pass through the string, reading character by character and copying to a StringBuilder:

StringBuilder sb = new StringBuilder(theText.Length);
foreach (char c in theText)
{
    switch (c)
    {
        case '\t' : sb.Append("\\t"); break;
        case '\r' : sb.Append("\\r"); break;
        case '\n' : sb.Append("\\n"); break;
        default : sb.Append(c); break;
    }
}

byte[] theChars = Encoding.ASCII.GetBytes(sb.ToString());

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