C#正则匹配问题---------------------bbslistbymodel.aspx?forumid=4748&cd=0&bbslistbymodel.aspx?forumid=4747&cd=0&lbbslistbymodel.aspx?forumid=4746&cd=0&lbbslistbymodel.aspx?forumid=4745&cd=0&lbbslistbymodel.as

Question

C#正则匹配问题
---------------------
bbs_listbymodel.aspx?forumid=4748&cd=0&
bbs_listbymodel.aspx?forumid=4747&cd=0&l
bbs_listbymodel.aspx?forumid=4746&cd=0&l
bbs_listbymodel.aspx?forumid=4745&cd=0&l
bbs_listbymodel.aspx?forumid=4744&cd=0&l
bbs_listbymodel.aspx?forumid=4743&cd=0&l
---------------------
我要匹配forumid=到&所有东西,即4748,4747..我是初学者,很东西都不明白,麻烦高手写出详细代码!

Answer 1

string str = "bbs_listbymodel.aspx?forumid=4748&cd=0&"
+ "bbs_listbymodel.aspx?forumid=4747&cd=0&l"
+ "bbs_listbymodel.aspx?forumid=4746&cd=0&l"
+ "bbs_listbymodel.aspx?forumid=4745&cd=0&l"
+ "bbs_listbymodel.aspx?forumid=4744&cd=0&l"
+ "bbs_listbymodel.aspx?forumid=4743&cd=0&l";
string result="";
Regex reg = new Regex(@"forumid=(?\d{4})");
MatchCollection mats = reg.Matches(str);
foreach (Match mat in mats)
{
result=mat.Groups["id"].Value;//这里取匹配到的值,怎么处理看你自己了
}