在C#中给定字符串段落之前和之后删除字符串

Question

我在这里有一个示例段落：

var story = "Once upon a time, there was a little girl named <i>Goldilocks.</i>
She went for a walk in the forest. Pretty soon, she came upon a house. <strong>She 
knocked and, when no one answered, </strong>she walked right in. At the table in the kitchen, 
there were three bowls of porridge. Goldilocks was hungry. She tasted the porridge from the first bowl.";

我想要做的是在某些选定字符之前和之后修剪或删除某些段落。此特定段落位于</i> 之后和<strong> html 标记之前。到目前为止，我尝试使用Substring

story.Substring(story.IndexOf("<strong>"));

但它会删除 <strong> 之前的所有内容我想要达到的结果是这样的：

var story = "Once upon a time, there was a little girl named <i>Goldilocks.</i><strong>She 
knocked and, when no one answered, </strong>she walked right in. At the table in the kitchen, 
there were three bowls of porridge. Goldilocks was hungry. She tasted the porridge from the first bowl.";

没有She went for a walk in the forest. Pretty soon, she came upon a house.

我也试过了，

story = story.Substring(story.IndexOf("</i>")).Substring(0, story.LastIndexOf("<strong>" + 1);

但它不起作用。

有什么帮助吗？

Answer 1

您可以使用正则表达式来实现您的组并进行高级替换。 试试这个：

Regex.Replace(story, "</i>.*?<strong>", "</i><strong>");