Question

正则表达式拿到字符串所有img标签

字符串如下
a="<p> </p>\r\n\r\n<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/28/content_42a98226cffc1e1741268be24e90f603728de94c.jpg\" style=\"width: 533px; height: 800px;\" /></p>\r\n\r\n<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/29/content_d01373f082025aaf5d7db824ffedab64024f1a96.jpg\" style=\"width: 499px; height: 710px;\" />呵呵</p>\r\n\r\n<p>哈哈</p>\r\n\r\n<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/30/content_0180300244.jpg\" style=\"width: 565px; height: 800px;\" /></p>\r\n"
a.match("<(?i)img(.*?)</(?i)")得到的结果如下：
"<img alt=\"\" src=\"/uploads/ckeditor/pictures/28/content_42a98226cffc1e1741268be24e90f603728de94c.jpg\" style=\"width: 533px; height: 800px;\" />"
1:"/uploads/ckeditor/pictures/28/content_42a98226cffc1e1741268be24e90f603728de94c.jpg">

为什么只能拿到第一条？

Answer 1

var  a="<p> </p>\r\n\r\n<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/28/content_42a98226cffc1e1741268be24e90f603728de94c.jpg\" style=\"width: 533px; height: 800px;\" /></p>\r\n\r\n<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/29/content_d01373f082025aaf5d7db824ffedab64024f1a96.jpg\" style=\"width: 499px; height: 710px;\" />呵呵</p>\r\n\r\n<p>哈哈</p>\r\n\r\n<p><img alt=\"\" src=\"/uploads/ckeditor/pictures/30/content_0180300244.jpg\" style=\"width: 565px; height: 800px;\" /></p>\r\n";

var reg = /<img[^>]*>/gi;
a.match(reg);

回答完毕，采纳即可

Answer 2

循环啊 ？？？？不然匹配到了就返回true 肯定只能拿到第一条啊

追问

这怎么循环

追答

StringBuilder sbuilder = new StringBuilder();
foreach (var temp in Regex.Matches(a, "<(?i)img(.*?)</(?i)")) {
sbuilder.Append(temp.Value.Trim());
}
Console.WriteLine(sbuilder.ToString());