正则表达式组字符串替换c#
正则表达式组字符串替换c#
提问于 2014-09-10 01:22:21
目标字符串为"qwer on chat: qwer chat"。我想将已有的qwer .. etc替换为编码文本(md5) //。但我不想将"on chat:"替换为文本编码，而“聊天”这个词是要编码的。预期的结果是"{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);
}Stack Overflow用户
发布于 2014-09-10 01:36:13
不需要正则表达式，您可以只使用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);如果你一定要使用正则表达式，你可以这样做：
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，md5是一个接受字符串并返回md5编码字符串的函数。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/25750521
复制相关文章
相似问题
腾讯云开发者
