c# - 提取两个字符串之间的所有字符串

Question

我正在尝试开发一种方法来匹配两个字符串之间的所有字符串:

我已经试过了，但它只返回第一个匹配项:

string ExtractString(string s, string start,string end)
        {
            // You should check for errors in real-world code, omitted for brevity

            int startIndex = s.IndexOf(start) + start.Length;
            int endIndex = s.IndexOf(end, startIndex);
            return s.Substring(startIndex, endIndex - startIndex);
        }

假设我们有这个字符串

String Text = "A1FIRSTSTRINGA2A1SECONDSTRINGA2akslakhflkshdflhksdfA1THIRDSTRINGA2"

我想要一个执行以下操作的 c# 函数:

public List<string> ExtractFromString(String Text,String Start, String End)
{
    List<string> Matched = new List<string>();
    .
    .
    .
    return Matched; 
}
// Example of use 

ExtractFromString("A1FIRSTSTRINGA2A1SECONDSTRINGA2akslakhflkshdflhksdfA1THIRDSTRINGA2","A1","A2")

    // Will return :
    // FIRSTSTRING
    // SECONDSTRING
    // THIRDSTRING

感谢您的帮助!

Answer 1

    private static List<string> ExtractFromBody(string body, string start, string end)
    {
        List<string> matched = new List<string>();

        int indexStart = 0;
        int indexEnd = 0;

        bool exit = false;
        while (!exit)
        {
            indexStart = body.IndexOf(start);

            if (indexStart != -1)
            {
                indexEnd = indexStart + body.Substring(indexStart).IndexOf(end);

                matched.Add(body.Substring(indexStart + start.Length, indexEnd - indexStart - start.Length));

                body = body.Substring(indexEnd + end.Length);
            }
            else
            {
                exit = true;
            }
        }

        return matched;
    }