正则问题，为何只能匹配到一条数据

[踏平扶桑]

string sss = "<img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" />";

        string pattern = "<img.*title=\"(?<Title>.+?)\".*src=\"(?<SRC>.+?)\".*longdesc=\"(?<DESC>.+?)\" />";
        string title = string.Empty;
        string src = string.Empty;
        string longdesc = string.Empty;
        StringBuilder js = new StringBuilder();

        Regex rr = new Regex(pattern, RegexOptions.IgnoreCase);
        MatchCollection matches = rr.Matches(sss);
        int i = 1;
        foreach (Match match in matches)
        {
            title = match.Groups["Title"].Value;
            src = match.Groups["SRC"].Value;
            longdesc = match.Groups["DESC"].Value;

            js.Append("<li>");
            js.Append("<a href=\"javascript:void(0);\">");
            js.Append("<img src=\"\" width=\"120\" height=\"80\" alt=\"" + title + "\" />");
            js.Append("</a>");
            js.Append("</li>");
            i++;
        }
        Console.Write(matches.Count.ToString());
        Console.Write(js.ToString());

[bdmh]

先说清楚你想要什么结果

[踏平扶桑]

引用 1 楼 bdmh 的回复:

先说清楚你想要什么结果

我就想把各个img分组提取出来 title src 和longdesc 这个正则写的有问题，总是只能匹配出来一条。

[再来壹串]

这样？

<img[^>]*title=\\"(?<title>[^"]*)\\"[^>]*src=\\"(?<src>[^"]*)\\"

[bingoexp]

string pattern = "<img.*?title=\"(?<Title>.+?)\".*?src=\"(?<SRC>.+?)\".*?longdesc=\"(?<DESC>.+?)\" />";

应该是 .*?

[踏平扶桑]

引用 3 楼 mail_yq 的回复:

这样？

<img[^>]*title=\\"(?<title>[^"]*)\\"[^>]*src=\\"(?<src>[^"]*)\\"

貌似还是匹配一条（但是是错的，开头是开头，尾部是最后一个img的尾部了。）。

[踏平扶桑]

是贪婪模式的问题。多谢多谢

[再来壹串]

引用 5 楼 5653325 的回复:

[quote=引用 3 楼 mail_yq 的回复:] 这样？

<img[^>]*title=\\"(?<title>[^"]*)\\"[^>]*src=\\"(?<src>[^"]*)\\"

貌似还是匹配一条（但是是错的，开头是开头，尾部是最后一个img的尾部了。）。[/quote]

string sss = "<img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" /><img width=\"499\" height=\"323\" title=\"asdfsadfasdf\" alt=\"\" src=\"http://images.xxxxxx.cn/2013/0522/20130522113854351.jpg\" border=\"0\" longdesc=\"asdfasdfsadfasdf\" />";

            string pattern = @"<img[^>]*title=\""(?<title>[^""]*)\""[^>]*src=\""(?<src>[^""]*)\""[^>]*longdesc=\""(?<longdesc>[^""]*)";
            string title = string.Empty;
            string src = string.Empty;
            string longdesc = string.Empty;
            StringBuilder js = new StringBuilder();

            Regex rr = new Regex(pattern, RegexOptions.IgnoreCase);
            MatchCollection matches = rr.Matches(sss);
            int i = 1;
            foreach (Match match in matches)
            {
                title = match.Groups["Title"].Value;
                src = match.Groups["SRC"].Value;
                longdesc = match.Groups["DESC"].Value;

                js.Append("<li>");
                js.Append("<a href=\"javascript:void(0);\">");
                js.Append("<img src=\"\" width=\"120\" height=\"80\" alt=\"" + title + "\" />");
                js.Append("</a>");
                js.Append("</li>");
                i++;
            } 

我这里是可以的