求一个正则表达式

Question

<a href="http://www.microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=211a9c07-88ff-4ae4-a82a-ce2045c6c4fe" target="_blank">下载此更新其中211a9c07-88ff-4ae4-a82a-ce2045c6c4fe可变，就求这个表达式
立即结贴

Answer 1

string yourStr = ......;
MatchCollection mc = Regex.Matches(yourStr, "<a\\s+href=\".+?&FamilyID=(.+?)\".+?>", RegexOptions.IgnoreCase);
foreach(Match m in mc)
{
    m.Groups[1].Value;//
}

Answer 2

using System;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;namespace RegexTest
{
    public class RegexTest
    {
        public void Test()
        {
            string input = @"<a href=""http://www.microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=211a9c07-88ff-4ae4-a82a-ce2045c6c4fe"" target=""_blank"">下载此更新";            string pattern = @"(?<=&FamilyID=)[a-zA-Z0-9-]{36}(?=" target=)";
            RegexOptions options = RegexOptions.None;
            Regex regex = new Regex(pattern, options);
            MatchCollection matches = regex.Matches(input);            foreach (Match match in matches)
            {
                Console.WriteLine(match.Value);
            }
        }
    }
}

Answer 3

using System;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;namespace RegexTest
{
    public class RegexTest
    {
        public static void Main()
        {
            string input = @"<a href=""http://www.microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=211a9c07-88ff-4ae4-a82a-ce2045c6c4fe"" target=""_blank"">下载此更新";            string pattern = @"(?<=&FamilyID=)[a-zA-Z0-9-]{36}(?="" target=)";
            RegexOptions options = RegexOptions.None;
            Regex regex = new Regex(pattern, options);
            MatchCollection matches = regex.Matches(input);            foreach (Match match in matches)
            {
                Console.WriteLine(match.Value);
            }
        }
    }
}

Answer 4

string sid = "";
    string yourStr = "<a href=\"http://www.microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=211a9c07-88ff-4ae4-a82a-ce2045c6c4fe\" target=\"_blank\">......;"
    Match mc = Regex.Matche(yourStr, "<a\\s+href=\"(?<URL>.+)&FamilyID=(?<name>.+)\">"\s+target=\"_blank\">......;", 
                             RegexOptions.IgnoreCase);
    if(mc == null)
    {}
    else
    {
       sid =  m.Groups["name"].Value;//
    }

Answer 5

string strReg = "<a href=\"http://www.microsoft.com/downloads/details.aspx?displaylang=zh-cn&FamilyID=211a9c07-88ff-4ae4-a82a-ce2045c6c4fe\" target=\"_blank\">";strReg = Regex.Replace(strReg,@"<a\s+href=.*FamilyID=(?<a>[^\"]*?)\"\s+target=\"_blank\">", ${a},RegexOptions.IgnoreCase | RegexOptions.Compiled);可得到211a9c07-88ff-4ae4-a82a-ce2045c6c4fe