求一正则表达式，提取URL中的id值

[lkf181]

URL中有id 和uid 我只想提取id值：
https://detail.xx.com/item.htm?uid=1549427204506&&id=124454445744&ali_trackid=2:mm_11054438_25822918_99096389:1549427448_213_1594518799

下边代码提取到的是uid的值，另外奇怪的是：我将改成 string strRegex = @"id=(\d[10,15])"; 竟然什么也提取不到！！！！

    class Program
    {
        static void Main(string[] args)
        {
            string modle = "https://detail.xx.com/item.htm?uid=1549427204506&&id=124454445744&ali_trackid=2:mm_11054438_25822918_99096389:1549427448_213_1594518799";
            string strRegex = @"id=(\d+)";


            string id = RegexGetString(modle, strRegex);
            Console.WriteLine(id);
            Console.ReadKey();
        }
        static string RegexGetString(string pStrUrl, string pStrRegex)
        {

            string strSuccess = string.Empty;
            string rsult = "";
            Match match = Regex.Match(pStrUrl, pStrRegex);
            if (match.Success)
            {
                rsult = match.Groups[1].Value;
            }


            bool b = Regex.IsMatch(rsult, @"\d{10,15}");//出于谨慎再次检验

            if (b)
            {
                strSuccess = rsult;
            }

            return strSuccess;
        }
    }

[xuzuning]

你要去的是 id 而非 uid 所以要 string strRegex = @"&id=(\d+)"; 另外 string strRegex = @"id=(\d[10,15])"; 应写作 string strRegex = @"id=(\d{10,15})"; string strRegex = @"id=(\d[10,15])"; 只能匹配到 uid=1549427204506 中的 15 于是 bool b = Regex.IsMatch(rsult, @"\d{10,15}");//出于谨慎再次检验 就过于谨慎了

[lkf181]

不是 那个id前面不一定有& id有可能是在最前面，即：
https://detail.xx.com/item.htm?id=124454445744&uid=1549427204506&&i&ali_trackid=2:mm_11054438_25822918_99096389:1549427448_213_1594518799

[lkf181]

研究出来了 应该是：[?|&]id=(\d{10,15})

[以专业开发人员为伍]

// System.Net.HttpListenerRequest.Helpers
internal static void FillFromString(NameValueCollection nvc, string s, bool urlencoded, Encoding encoding)
{
	int num = (s != null) ? s.Length : 0;
	for (int i = (s.Length > 0 && s[0] == '?') ? 1 : 0; i < num; i++)
	{
		int num2 = i;
		int num3 = -1;
		while (i < num)
		{
			char c = s[i];
			if (c == '=')
			{
				if (num3 < 0)
				{
					num3 = i;
				}
			}
			else if (c == '&')
			{
				break;
			}
			i++;
		}
		string text = null;
		string text2;
		if (num3 >= 0)
		{
			text = s.Substring(num2, num3 - num2);
			text2 = s.Substring(num3 + 1, i - num3 - 1);
		}
		else
		{
			text2 = s.Substring(num2, i - num2);
		}
		if (urlencoded)
		{
			nvc.Add((text == null) ? null : HttpListenerRequest.Helpers.UrlDecodeStringFromStringInternal(text, encoding), HttpListenerRequest.Helpers.UrlDecodeStringFromStringInternal(text2, encoding));
		}
		else
		{
			nvc.Add(text, text2);
		}
		if (i == num - 1 && s[i] == '&')
		{
			nvc.Add(null, "");
		}
	}
}

[dalmeeme]

			string s = "https://detail.xx.com/item.htm?uid=1549427204506&&id=124454445744&ali_trackid=2:mm_11054438_25822918_99096389:1549427448_213_1594518799";
			string r = HttpUtility.ParseQueryString(s)["id"];
			Console.WriteLine(r);
			Console.ReadKey();

引用System.Web程序集。

[lkf181]

引用 5 楼 无机战士 的回复:

			string s = "https://detail.xx.com/item.htm?uid=1549427204506&&id=124454445744&ali_trackid=2:mm_11054438_25822918_99096389:1549427448_213_1594518799";
			string r = HttpUtility.ParseQueryString(s)["id"];
			Console.WriteLine(r);
			Console.ReadKey();

引用System.Web程序集。

高手在民间啊！！谢谢