Question

我需要能够在2个标签之间提取字符串，例如：“{00}”来自“morenonxmldata<tag1>0002</tag1>morenonxmldata”

我正在使用C＃和.NET 3.5。

Answer 1

  Regex regex = new Regex("<tag1>(.*)</tag1>");
  var v = regex.Match("morenonxmldata<tag1>0002</tag1>morenonxmldata");
  string s = v.Groups[1].ToString();

或（如评论中所述）匹配最小子集：

  Regex regex = new Regex("<tag1>(.*?)</tag1>");

Regex类位于System.Text.RegularExpressions命名空间中。

Answer 2

无需正则表达式的解决方案：

string ExtractString(string s, string tag) {
     // You should check for errors in real-world code, omitted for brevity
     var startTag = "<" + tag + ">";
     int startIndex = s.IndexOf(startTag) + startTag.Length;
     int endIndex = s.IndexOf("</" + tag + ">", startIndex);
     return s.Substring(startIndex, endIndex - startIndex);
}

Answer 3

使用延迟匹配和反向引用的Regex方法：

foreach (Match match in Regex.Matches(
        "morenonxmldata<tag1>0002</tag1>morenonxmldata<tag2>abc</tag2>asd",
        @"<([^>]+)>(.*?)</\1>"))
{
    Console.WriteLine("{0}={1}",
        match.Groups[1].Value,
        match.Groups[2].Value);
}

Answer 4

在两个已知值之间提取内容对以后也很有用。那么为什么不为它创建一个扩展方法呢。这就是我所做的，简短而简单......

  public static string GetBetween(this string content, string startString, string endString)
    {
        int Start=0, End=0;
        if (content.Contains(startString) && content.Contains(endString))
        {
            Start = content.IndexOf(startString, 0) + startString.Length;
            End = content.IndexOf(endString, Start);
            return content.Substring(Start, End - Start);
        }
        else
            return string.Empty;
    }

Answer 5

string input = "Exemple of value between two string FirstString text I want to keep SecondString end of my string";
var match = Regex.Match(input, @"FirstString (.+?) SecondString ").Groups[1].Value;

Answer 6

为了将来参考，我在http://www.mycsharpcorner.com/Post.aspx?postID=15找到了此代码段如果您需要搜索不同的“代码”，则效果非常好。

    public static string[] GetStringInBetween(string strBegin,
        string strEnd, string strSource,
        bool includeBegin, bool includeEnd)           
    {
        string[] result ={ "", "" };
        int iIndexOfBegin = strSource.IndexOf(strBegin);
        if (iIndexOfBegin != -1)
        {
            // include the Begin string if desired
            if (includeBegin)
                iIndexOfBegin -= strBegin.Length;
            strSource = strSource.Substring(iIndexOfBegin
                + strBegin.Length);
            int iEnd = strSource.IndexOf(strEnd);
            if (iEnd != -1)
            {
                // include the End string if desired
                if (includeEnd)
                    iEnd += strEnd.Length;
                result[0] = strSource.Substring(0, iEnd);
                // advance beyond this segment
                if (iEnd + strEnd.Length < strSource.Length)
                    result[1] = strSource.Substring(iEnd
                        + strEnd.Length);
            }
        }
        else
            // stay where we are
            result[1] = strSource;
        return result;
    }

Answer 7

我在数据之前和之后剥离。

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Text.RegularExpressions;

 namespace testApp
 {
     class Program
     {
         static void Main(string[] args)
         {
             string tempString = "morenonxmldata<tag1>0002</tag1>morenonxmldata";
             tempString = Regex.Replace(tempString, "[\\s\\S]*<tag1>", "");//removes all leading data
             tempString = Regex.Replace(tempString, "</tag1>[\\s\\S]*", "");//removes all trailing data

             Console.WriteLine(tempString);
             Console.ReadLine();
         }
     }
 }

Answer 8

要获取不带正则表达式的单/多值

// For Single
var value = inputString.Split("<tag1>", '</tag1>')[1];

// For Multiple
var values = inputString.Split("<tag1>", '</tag1>').Where((_, index) => index % 2 != 0);

Answer 9

没有RegEx，有一些必须进行的值检查

    public static string ExtractString(string soapMessage, string tag)
    {
        if (string.IsNullOrEmpty(soapMessage))
            return soapMessage;

        var startTag = "<" + tag + ">";
        int startIndex = soapMessage.IndexOf(startTag);
        startIndex = startIndex == -1 ? 0 : startIndex + startTag.Length;
        int endIndex = soapMessage.IndexOf("</" + tag + ">", startIndex);
        endIndex = endIndex > soapMessage.Length || endIndex == -1 ? soapMessage.Length : endIndex;
        return soapMessage.Substring(startIndex, endIndex - startIndex);
    }

Answer 10

    public string between2finer(string line, string delimiterFirst, string delimiterLast)
    {
        string[] splitterFirst = new string[] { delimiterFirst };
        string[] splitterLast = new string[] { delimiterLast };
        string[] splitRes;
        string buildBuffer;
        splitRes = line.Split(splitterFirst, 100000, System.StringSplitOptions.RemoveEmptyEntries);
        buildBuffer = splitRes[1];
        splitRes = buildBuffer.Split(splitterLast, 100000, System.StringSplitOptions.RemoveEmptyEntries);
        return splitRes[0];
    }


    private void button1_Click(object sender, EventArgs e)
    {
        string manyLines = "Received: from exim by isp2.ihc.ru with local (Exim 4.77) \nX-Failed-Recipients: rmnokixm@gmail.com\nFrom: Mail Delivery System <Mailer-Daemon@isp2.ihc.ru>";
        MessageBox.Show(between2finer(manyLines, "X-Failed-Recipients: ", "\n"));
    }

找到2个已知值之间的字符串

10 个答案: