[英]C# Regex.Replace case insensitive as a function of the match
Say I have some text like this: 说我有这样的文字:
string text = "Hello world! hElLo world!";
I want to add a span tag around each of the words 'hello' in a case insensitive way so that the result is this: 我想以不区分大小写的方式在每个单词'hello'周围添加一个span标记,以便结果如下:
string text = "<span>Hello</span> world! <span>hElLo</span> world!";
I tried to do this with Regex.Replace like so: 我尝试用Regex.Replace这样做:
Regex.Replace(text, "hello", "<span>hello</span>", RegexOptions.IgnoreCase);
But what I really need is just the span tags to be created, leaving the original casing alone. 但我真正需要的只是要创建的span标签,只保留原始外壳。 So I would need the replace phrase to be a function of the matched phrase.
所以我需要替换短语是匹配短语的函数。 How can I do this?
我怎样才能做到这一点?
Instead of hard-coding the hello
in the replacement pattern, use a $&
backreference to the entire match value. 不要在替换模式中对
hello
进行硬编码,而是对整个匹配值使用$&
backreference。
Replace "<span>hello</span>"
with "<span>$&</span>"
, use 将
"<span>hello</span>"
替换为"<span>$&</span>"
,使用
var replaced = Regex.Replace(text, "hello", "<span>$&</span>", RegexOptions.IgnoreCase);
See more about replacement backreferences in Substitutions in Regular Expressions . 查看有关正则表达式替换中的替换反向引用的更多信息。
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