Regex组字符串替换c#

本文关键字：替换 字符串 Regex | 更新日期: 2023-09-27 18:21:10

目标字符串是"qwer on chat: qwer chat"。我想将qwer .. etc替换为已经具有的编码文本（md5）//。但我不想把"on chat:"替换为文本编码，而"聊天"这个词是要编码的。预期结果为"{md5}{md5}{md5}{md5} on chat: {md5}{md5}{md5}{md5} {md5}{md5}{md5}{md5}"。我如何在C#中做到这一点？谢谢

    public static string GetUniqueKey(int maxSize)
    {
        char[] chars = new char[62];
        chars =
        "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890".ToCharArray();
        byte[] data = new byte[1];
        RNGCryptoServiceProvider crypto = new RNGCryptoServiceProvider();
        crypto.GetNonZeroBytes(data);
        data = new byte[maxSize];
        crypto.GetNonZeroBytes(data);
        StringBuilder result = new StringBuilder(maxSize);
        foreach (byte b in data)
        {
            result.Append(chars[b % (chars.Length)]);
        }
        string l = result.ToString();
        return "{"+l+"}";
    }
    static IDictionary<string, string> map = new Dictionary<string, string>()
        {
        {"q",GetUniqueKey(5)},
        {"w",GetUniqueKey(5)},
        {"e",GetUniqueKey(5)},
        {"r",GetUniqueKey(5)},
        {"a",GetUniqueKey(5)},
        {"c",GetUniqueKey(5)},
        {"h",GetUniqueKey(5)},
        {"t",GetUniqueKey(5)},
        {"o",GetUniqueKey(5)},
        {"n",GetUniqueKey(5)},
        };
    public void ccc(string str)
    {
    var regex = new Regex(String.Join("|", map.Keys.Select(k => Regex.Escape(k))));
    string newStr = regex.Replace(str ,m => map[m.Value]);
    richTextBox1.AppendText(Environment.NewLine + newStr);
    }

Regex组字符串替换c#

不需要正则表达式，只需使用String.Split和String.Join:

    string s = "qwer on chat: qwer chat";
    var parts = s.Split(new string[] {"on chat:"}, StringSplitOptions.RemoveEmptyEntries);
    for (int i = 0; i < parts.length; i++) {
        // MD5 encode each part here replacing the value in the array
    }
    var final = string.Join("on chat:", parts);

如果您绝对必须使用正则表达式，您可以执行以下操作：

    var r = new Regex(@"^(.*)(on chat:)(.*)$");
    var n = r.Replace(s, m=> md5(m.Groups[1].Value) + m.Groups[2].Value + md5(m.Groups[3].Value));

其中CCD_ 7是采用字符串并返回md5编码的字符串的函数。

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