C#怎么解析特定格式字符串

[JasonXiaohan]

比如有一个字符串，格式为：
<ul id="mycarousel" class="jcarousel-skin-tango"> <li><img onerror=
"this.src='http://www.360buy.com/images/none/none_50.gif'" alt= "新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫" src=
"http://img10.360buyimg.com/S5/751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg"
name="751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg" /></li> <li><img onerror=
"this.src='http://www.360buy.com/images/none/none_50.gif'" alt= "新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫" src=
"http://img10.360buyimg.com/S5/967/ec79372b-5490-45ca-8510-b54390d9d158.jpg"
name="967/ec79372b-5490-45ca-8510-b54390d9d158.jpg" /></li> <li><img onerror=
"this.src='http://www.360buy.com/images/none/none_50.gif'" alt= "新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫" src=
"http://img10.360buyimg.com/S5/465/ebde2500-91f9-47d5-9ad5-5f686782d45c.jpg"
name="465/ebde2500-91f9-47d5-9ad5-5f686782d45c.jpg" /></li> <li><img onerror=
"this.src='http://www.360buy.com/images/none/none_50.gif'" alt= "新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫" src=
"http://img10.360buyimg.com/S5/743/cb76616a-14af-4e81-8dee-9db79d25a696.jpg"
name="743/cb76616a-14af-4e81-8dee-9db79d25a696.jpg" /></li> <li><img onerror=
"this.src='http://www.360buy.com/images/none/none_50.gif'" alt= "新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫" src=
"http://img10.360buyimg.com/S5/437/339984ce-bbdc-414a-b499-fd0745b4383b.jpg"
name="437/339984ce-bbdc-414a-b499-fd0745b4383b.jpg" /></li> </ul>
现在的目的就是，我想得到src标签后面的值，例如：http://img10.360buyimg.com/S5/751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg要的是这样的格式。请问各位大侠们怎么才能实现，谢谢！

[jiangshun]

string str = @"<ul id=""mycarousel"" class=""jcarousel-skin-tango""> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg""
name=""751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/967/ec79372b-5490-45ca-8510-b54390d9d158.jpg""
name=""967/ec79372b-5490-45ca-8510-b54390d9d158.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/465/ebde2500-91f9-47d5-9ad5-5f686782d45c.jpg""
name=""465/ebde2500-91f9-47d5-9ad5-5f686782d45c.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/743/cb76616a-14af-4e81-8dee-9db79d25a696.jpg""
name=""743/cb76616a-14af-4e81-8dee-9db79d25a696.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/437/339984ce-bbdc-414a-b499-fd0745b4383b.jpg""
name=""437/339984ce-bbdc-414a-b499-fd0745b4383b.jpg"" /></li> </ul>";

            Regex reg = new Regex(@"(?is)http://img10.360buyimg.com/\w+/\w+/[^\.]+.jpg");
            MatchCollection mc = reg.Matches(str);

            foreach (Match m in mc)
            {
                Console.WriteLine(m.Groups[0].ToString());
            }

            /*
            http://img10.360buyimg.com/S5/751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg
            http://img10.360buyimg.com/S5/967/ec79372b-5490-45ca-8510-b54390d9d158.jpg
            http://img10.360buyimg.com/S5/465/ebde2500-91f9-47d5-9ad5-5f686782d45c.jpg
            http://img10.360buyimg.com/S5/743/cb76616a-14af-4e81-8dee-9db79d25a696.jpg
            http://img10.360buyimg.com/S5/437/339984ce-bbdc-414a-b499-fd0745b4383b.jpg
            */

[兔子-顾问]

        private static void TestRegex01()
        {
            string html = @"<ul id=""mycarousel"" class=""jcarousel-skin-tango""> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg""
name=""751/bc003c8b-e896-48ff-b096-2b535d3eec72.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/967/ec79372b-5490-45ca-8510-b54390d9d158.jpg""
name=""967/ec79372b-5490-45ca-8510-b54390d9d158.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/465/ebde2500-91f9-47d5-9ad5-5f686782d45c.jpg""
name=""465/ebde2500-91f9-47d5-9ad5-5f686782d45c.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/743/cb76616a-14af-4e81-8dee-9db79d25a696.jpg""
name=""743/cb76616a-14af-4e81-8dee-9db79d25a696.jpg"" /></li> <li><img onerror=
""this.src='http://www.360buy.com/images/none/none_50.gif'"" alt= ""新贵(NEWMEN)小屁股 MP-201高级柔性护腕垫"" src=
""http://img10.360buyimg.com/S5/437/339984ce-bbdc-414a-b499-fd0745b4383b.jpg""
name=""437/339984ce-bbdc-414a-b499-fd0745b4383b.jpg"" /></li> </ul>";
            MatchCollection mc = Regex.Matches(html, @"(?is)(?<=<img.+?src=['""])http[^'""]+");
            foreach (Match m in mc)
            {
                Console.WriteLine(m.Value);
            }
        }

[wuyq11]

Regex reg = new Regex(@"(?i)<img[^>]*?\ssrc\s*=\s*(['""]?)(?<src>[^'""\s>]+)\1[^>]*>");
MatchCollection mc = reg.Matches("");
foreach (Match m in mc)
{
Console.Write(m.Groups["src"].Value + "\n");
}

[mars199]

膜拜楼上三位

[jmh521]

1.split...
2.substring...