Question

这是一个简单的测试案例，我觉得我缺少一些基本的东西，但任何帮助都会受到赞赏！

string data = @"Well done UK building industry, Olympics \u00a3377m under budget + boost";
foreach (Match m in Regex.Matches(data, @"\\u(\w*)\b"))
{
    Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
    string match = m.Value;
    // These should output the exact same thing however the first is a £ and the other is \u00a3377m
    Console.WriteLine("\u00a3377m" + "      " + match);
}

Answer 1

您忘了逃避手动打印的字符串。因此，特殊的角色＆＃39; \ u00a3377m＆＃39;直接解决。

以下工作符合要求：

// These should output the exact same thing however the first is a £ and the other is \u00a3377m
            Console.WriteLine("\\u00a3377m" + "      " + match);

另一种选择是使用@：

Console.WriteLine(@"\u00a3377m" + "      " + match);

Answer 2

00A3是£字符的unicode。看看http://unicode-table.com/en/#00A3

因此，当您尝试撰写“\u00a3377m"时，regular string literal将为£377m。

使用 verbtaim string literal 代替;

Console.WriteLine(@"\u00a3377m" + "      " + match);

我完全忘了添加我真正想要的问题 £sign

char c = '\u00a3';
string s = c.ToString(); // s will be £

Answer 3

我很感激帮助，但是我错过了一些关键信息，这是我的错。

我实际上希望输出为“££”而不是“£\ u00a3377m”。

为此，我最终使用Replace unicode escape sequences in a string的答案，即使用以下功能：

private static Regex _regex = new Regex(@"\\u(?<Value>[a-zA-Z0-9]{4})", RegexOptions.Compiled);
public string Decoder(string value)
{
    return _regex.Replace(
        value,
        m => ((char)int.Parse(m.Groups["Value"].Value, NumberStyles.HexNumber)).ToString()
    );
}

然后像这样使用它：

string data = @"Well done UK building industry, Olympics \u00a3377m under budget + boost";
foreach (Match m in Regex.Matches(data, @"\\u(\w*)\b"))
{
    Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
    string match = m.Value;
    //Decode the string so we no longer have \u values
    match = Decoder(match);
    // These should output the exact same thing however the first is a £ and the other is \u00a3377m
    Console.WriteLine("\u00a3377m" + "      " + match);
}

C＃UTF-8字符编码输出 - 变量不同于字符串

3 个答案: