求正则表达式

Question

我要匹配：
<img src="images/post/smile/default/smile.gif" />
<img src="images/post/smile/default/17.gif" />
<img src="images/post/smile/default/13.gif" />
<img src="images/post/smile/default/11.gif" />
<img src="images/post/smile/default/crazy.gif" />17.gif、crazy.gif、等都是不固定变动的。求符合的正则表达式。

Answer 1

<img src="images/post/smile/default/\w+.gif" />

Answer 2

 string pattern = @"(?i)<img[^>]*?src=(['""]?)[^'""]+?([^'""/]*?\.[^'""]+?)\1[^>]*?>";
                string tempStr = File.ReadAllText(@"C:\Documents and Settings\Administrator\桌面\Test.txt", Encoding.GetEncoding("GB2312"));//读取txt                foreach (Match m in Regex.Matches(tempStr, pattern))
                {
                    //循环输出                    string img = m.Groups[2].Value;//17.gif
                }

Answer 3

Regex.Matches(str,@"(?is)<img src=""images/post/smile/default/\w+\.\w+""\s*/>")

Answer 4

string result=Regex.Replace(str,@"(?is)<img src=""images/post/smile/default/\w+\.\w+""\s*/>"," ");

Answer 5

string result = Regex.Replace(yourStr, "(?i)<img\\s*src=\"images/post/smile/default/[^\"]*\"[^>]*>", "");