IronWebScraper 教程 在 C# 中抓取博客网页 How to Scrape a Blog in C# Curtis Chau 已更新:六月 10, 2025 Download IronWebScraper NuGet 下载 DLL 下载 Start Free Trial Copy for LLMs Copy for LLMs Copy page as Markdown for LLMs Open in ChatGPT Ask ChatGPT about this page Open in Gemini Ask Gemini about this page Open in Grok Ask Grok about this page Open in Perplexity Ask Perplexity about this page Share Share on Facebook Share on X (Twitter) Share on LinkedIn Copy URL Email article This article was translated from English: Does it need improvement? Translated View the article in English 让我们使用Iron WebScraper提取博客内容,使用C#或VB.NET。 本教程展示了如何将WordPress博客(或类似的)重新抓取为内容,使用.NET // Define a class that extends WebScraper from IronWebScraper public class BlogScraper : WebScraper { /// <summary> /// Override this method to initialize your web-scraper. /// Set at least one start URL and configure domain or URL patterns. /// </summary> public override void Init() { // Set your license key for IronWebScraper License.LicenseKey = "YourLicenseKey"; // Enable logging for all actions this.LoggingLevel = WebScraper.LogLevel.All; // Set a directory to store output and cache files this.WorkingDirectory = AppSetting.GetAppRoot() + @"\BlogSample\Output\"; // Enable caching with a specific duration EnableWebCache(new TimeSpan(1, 30, 30)); // Request the start URL and specify the response handler this.Request("http://blogSite.com/", Parse); } } // Define a class that extends WebScraper from IronWebScraper public class BlogScraper : WebScraper { /// <summary> /// Override this method to initialize your web-scraper. /// Set at least one start URL and configure domain or URL patterns. /// </summary> public override void Init() { // Set your license key for IronWebScraper License.LicenseKey = "YourLicenseKey"; // Enable logging for all actions this.LoggingLevel = WebScraper.LogLevel.All; // Set a directory to store output and cache files this.WorkingDirectory = AppSetting.GetAppRoot() + @"\BlogSample\Output\"; // Enable caching with a specific duration EnableWebCache(new TimeSpan(1, 30, 30)); // Request the start URL and specify the response handler this.Request("http://blogSite.com/", Parse); } } ' Define a class that extends WebScraper from IronWebScraper Public Class BlogScraper Inherits WebScraper ''' <summary> ''' Override this method to initialize your web-scraper. ''' Set at least one start URL and configure domain or URL patterns. ''' </summary> Public Overrides Sub Init() ' Set your license key for IronWebScraper License.LicenseKey = "YourLicenseKey" ' Enable logging for all actions Me.LoggingLevel = WebScraper.LogLevel.All ' Set a directory to store output and cache files Me.WorkingDirectory = AppSetting.GetAppRoot() & "\BlogSample\Output\" ' Enable caching with a specific duration EnableWebCache(New TimeSpan(1, 30, 30)) ' Request the start URL and specify the response handler Me.Request("http://blogSite.com/", Parse) End Sub End Class $vbLabelText $csharpLabel 像往常一样,我们创建一个Scraper并继承自WebScraper类。 在这种情况下,它是“BlogScraper”。 我们设置一个工作目录为“\BlogSample\Output\”,以便所有的输出和缓存文件都可以存放。 然后我们启用网页缓存,将请求的页面保存到缓存文件夹“WebCache”中。 现在让我们编写一个解析函数: /// <summary> /// Override this method to handle the Http Response for your web scraper. /// Add additional methods if you handle multiple page types. /// </summary> /// <param name="response">The HTTP Response object to parse.</param> public override void Parse(Response response) { // Iterate over each link found in the section navigation foreach (var link in response.Css("div.section-nav > ul > li > a")) { switch(link.TextContentClean) { case "Reviews": { // Handle reviews case } break; case "Science": { // Handle science case } break; default: { // Save the link title to a file Scrape(new ScrapedData() { { "Title", link.TextContentClean } }, "BlogScraper.Jsonl"); } break; } } } /// <summary> /// Override this method to handle the Http Response for your web scraper. /// Add additional methods if you handle multiple page types. /// </summary> /// <param name="response">The HTTP Response object to parse.</param> public override void Parse(Response response) { // Iterate over each link found in the section navigation foreach (var link in response.Css("div.section-nav > ul > li > a")) { switch(link.TextContentClean) { case "Reviews": { // Handle reviews case } break; case "Science": { // Handle science case } break; default: { // Save the link title to a file Scrape(new ScrapedData() { { "Title", link.TextContentClean } }, "BlogScraper.Jsonl"); } break; } } } ''' <summary> ''' Override this method to handle the Http Response for your web scraper. ''' Add additional methods if you handle multiple page types. ''' </summary> ''' <param name="response">The HTTP Response object to parse.</param> Public Overrides Sub Parse(ByVal response As Response) ' Iterate over each link found in the section navigation For Each link In response.Css("div.section-nav > ul > li > a") Select Case link.TextContentClean Case "Reviews" ' Handle reviews case Case "Science" ' Handle science case Case Else ' Save the link title to a file Scrape(New ScrapedData() From { { "Title", link.TextContentClean } }, "BlogScraper.Jsonl") End Select Next link End Sub $vbLabelText $csharpLabel 在Parse方法中,我们从顶部菜单获取所有指向分类页面(电影、科学、评论等)的链接。 然后,我们根据链接类别切换到合适的解析方法。 让我们为科学页面准备我们的对象模型: /// <summary> /// Represents a model for Science Page /// </summary> public class ScienceModel { /// <summary> /// Gets or sets the title. /// </summary> public string Title { get; set; } /// <summary> /// Gets or sets the author. /// </summary> public string Author { get; set; } /// <summary> /// Gets or sets the date. /// </summary> public string Date { get; set; } /// <summary> /// Gets or sets the image. /// </summary> public string Image { get; set; } /// <summary> /// Gets or sets the text. /// </summary> public string Text { get; set; } } /// <summary> /// Represents a model for Science Page /// </summary> public class ScienceModel { /// <summary> /// Gets or sets the title. /// </summary> public string Title { get; set; } /// <summary> /// Gets or sets the author. /// </summary> public string Author { get; set; } /// <summary> /// Gets or sets the date. /// </summary> public string Date { get; set; } /// <summary> /// Gets or sets the image. /// </summary> public string Image { get; set; } /// <summary> /// Gets or sets the text. /// </summary> public string Text { get; set; } } ''' <summary> ''' Represents a model for Science Page ''' </summary> Public Class ScienceModel ''' <summary> ''' Gets or sets the title. ''' </summary> Public Property Title() As String ''' <summary> ''' Gets or sets the author. ''' </summary> Public Property Author() As String ''' <summary> ''' Gets or sets the date. ''' </summary> Public Property [Date]() As String ''' <summary> ''' Gets or sets the image. ''' </summary> Public Property Image() As String ''' <summary> ''' Gets or sets the text. ''' </summary> Public Property Text() As String End Class $vbLabelText $csharpLabel 现在让我们实现一个单页面抓取: /// <summary> /// Parses the reviews from the response. /// </summary> /// <param name="response">The HTTP Response object.</param> public void ParseReviews(Response response) { // A list to hold Science models var scienceList = new List<ScienceModel>(); foreach (var postBox in response.Css("section.main > div > div.post-list")) { var item = new ScienceModel { Title = postBox.Css("h1.headline > a")[0].TextContentClean, Author = postBox.Css("div.author > a")[0].TextContentClean, Date = postBox.Css("div.time > a")[0].TextContentClean, Image = postBox.Css("div.image-wrapper.default-state > img")[0].Attributes["src"], Text = postBox.Css("div.summary > p")[0].TextContentClean }; scienceList.Add(item); } // Save the science list to a JSONL file Scrape(scienceList, "BlogScience.Jsonl"); } /// <summary> /// Parses the reviews from the response. /// </summary> /// <param name="response">The HTTP Response object.</param> public void ParseReviews(Response response) { // A list to hold Science models var scienceList = new List<ScienceModel>(); foreach (var postBox in response.Css("section.main > div > div.post-list")) { var item = new ScienceModel { Title = postBox.Css("h1.headline > a")[0].TextContentClean, Author = postBox.Css("div.author > a")[0].TextContentClean, Date = postBox.Css("div.time > a")[0].TextContentClean, Image = postBox.Css("div.image-wrapper.default-state > img")[0].Attributes["src"], Text = postBox.Css("div.summary > p")[0].TextContentClean }; scienceList.Add(item); } // Save the science list to a JSONL file Scrape(scienceList, "BlogScience.Jsonl"); } ''' <summary> ''' Parses the reviews from the response. ''' </summary> ''' <param name="response">The HTTP Response object.</param> Public Sub ParseReviews(ByVal response As Response) ' A list to hold Science models Dim scienceList = New List(Of ScienceModel)() For Each postBox In response.Css("section.main > div > div.post-list") Dim item = New ScienceModel With { .Title = postBox.Css("h1.headline > a")(0).TextContentClean, .Author = postBox.Css("div.author > a")(0).TextContentClean, .Date = postBox.Css("div.time > a")(0).TextContentClean, .Image = postBox.Css("div.image-wrapper.default-state > img")(0).Attributes("src"), .Text = postBox.Css("div.summary > p")(0).TextContentClean } scienceList.Add(item) Next postBox ' Save the science list to a JSONL file Scrape(scienceList, "BlogScience.Jsonl") End Sub $vbLabelText $csharpLabel 在创建模型后,我们可以解析响应对象,深入挖掘其主要元素(标题、作者、日期、图像、文本)。 然后,我们使用Scrape(object, fileName)将我们的结果保存在一个单独的文件中。 点击这里查看完整的IronWebscraper使用教程 开始使用IronWebscraper 常见问题解答 如何在 C# 中创建博客网页抓取器? 要在 C# 中创建博客网页抓取器,您可以使用 IronWebScraper 库。首先定义一个扩展 WebScraper 类的类,设置起始 URL,配置抓取器以处理不同的页面类型,并使用 Parse 方法从 HTTP 响应中提取所需信息。 Parse 方法在网页抓取中的作用是什么? 在使用 IronWebScraper 进行网页抓取时,Parse 方法对于处理 HTTP 响应至关重要。它通过解析页面内容、识别链接并分类页面类型(如博客文章或其他部分)来帮助提取数据。 如何高效管理网页抓取数据? IronWebScraper 通过配置缓存来存储请求页面并设置输出文件的工作目录,以提高数据管理效率。这种组织有助于跟踪抓取的数据并减少不必要的页面重新获取。 IronWebScraper 如何帮助抓取 WordPress 博客? IronWebScraper 提供导航博客结构、提取文章详情和处理各种页面类型的工具,从而简化了 WordPress 博客的抓取。您可以使用该库解析标题、作者、日期、图片和文本等信息。 我可以将 IronWebScraper 用于 C# 和 VB.NET 吗? 是的,IronWebScraper 兼容 C# 和 VB.NET,对偏好使用这两种 .NET 语言的开发者来说是一个多用途的选择。 如何处理博客内的不同类型页面? 您可以通过在 IronWebScraper 中重写 Parse 方法来处理博客内的不同类型页面。这种方法允许您将页面分类为不同部分,如评论和科学,并对每一个应用特定的解析逻辑。 是否可以将抓取的博客数据以结构化格式保存? 是的,使用 IronWebScraper,您可以将抓取得到的博客数据保存为 JSONL 这样结构化的格式。这种格式有助于以行对行 JSON 格式存储每个数据,以便于后续管理和处理。 如何为我的网页抓取器设置工作目录? 在 IronWebScraper 中,您可以通过配置抓取器来指定输出和缓存文件的存储位置,从而设置工作目录。这有助于高效组织抓取的数据。 网页抓取中的常见故障排除场景有哪些? 网页抓取中的常见故障排除场景包括处理网站结构变化、管理速率限制和应对反抓取措施。使用 IronWebScraper,您可以实现错误处理和日志记录来诊断和解决这些问题。 在哪里可以找到更多有关使用 IronWebScraper 的资源? 您可以在 Iron Software 网站上的网页抓取教程部分找到关于使用 IronWebScraper 的资源和教程,其中提供了详尽的指南和示例。 Curtis Chau 立即与工程团队聊天 技术作家 Curtis Chau 拥有卡尔顿大学的计算机科学学士学位,专注于前端开发,精通 Node.js、TypeScript、JavaScript 和 React。他热衷于打造直观且美观的用户界面,喜欢使用现代框架并创建结构良好、视觉吸引力强的手册。除了开发之外,Curtis 对物联网 (IoT) 有浓厚的兴趣,探索将硬件和软件集成的新方法。在空闲时间,他喜欢玩游戏和构建 Discord 机器人,将他对技术的热爱与创造力相结合。 准备开始了吗? 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