How to Efficiently Extract Text from HTML in ASP.NET?

<p><img src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/173660560729540.jpg" class="lazy" alt="How to Efficiently Extract Text from HTML in ASP.NET? "></p> <p><strong>HTML text extraction method in ASP.NET</strong></p> <p>When processing HTML data in ASP.NET, it is often necessary to remove HTML tags to extract plain text content. This article introduces several commonly used text extraction techniques, including: </p> <p><strong>Regular expression based solution</strong></p> <p>This solution uses regular expressions to efficiently remove HTML tags. Text extraction is achieved by replacing all HTML tag patterns (e.g. tags starting with <code><</code>). </p> <p><strong>Normalization and Cleanup</strong></p> <p>After tags are removed, further processing is required to normalize the string. Multiple space characters are replaced with a single space, and leading and trailing spaces are removed. It is also possible to convert HTML character entities back to actual characters if necessary. </p> <p><strong>Limitations</strong></p> <p>Although this method is reliable, it also has limitations. HTML and XML allow the <code>></code> character in attribute values. If such a value exists, this scenario may return corrupted tokens. </p> <p><strong>Best Practices</strong></p> <p>Although the regular expression method can extract text quickly and efficiently, it is not a perfect solution. For more accurate and reliable results, it is recommended to use a suitable HTML parser. </p> <p><strong> Example: </strong></p> <pre class="brush:php;toolbar:false"><code class="language-csharp">string html = "<p>- Hello</p>"; string text = Regex.Replace(html, @"<[^>]+>", ""); //去除HTML标签 text = Regex.Replace(text, @"\s+", " "); //将多个空格替换为单个空格 text = text.Trim(); //去除开头和结尾的空格</code></pre> <p>This code will extract the text "Hello" from an HTML string. </p>

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