How to Scrape a Blog in C#

This article was translated from English: Does it need improvement?
Translated
View the article in English

讓我們使用 Iron WebScraper 來提取用 C# 或 VB.NET 實現的博客內容。

本教程展示如何使用 .NET 將 WordPress 博客(或類似的)抓取回內容。

FireShotScreenCaptureGizmodo related to How to Scrape a Blog in C#

// 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

如往常一樣,我們創建一個 Scraper 並繼承自 WebScraper 類。 在這個例子中,它是"BlogScraper"。

我們設定一個工作目錄為“\BlogSample\Output\”,用於存放所有輸出和緩存文件。

然後我們啟用網頁緩存以將請求頁面保存到緩存文件夾“WebCache”中。

現在讓我們編寫一個解析函數:

/// <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,我們從頂部菜單中獲取所有類別頁面的鏈接(電影、科學、評論等)。

然後,我們根據鏈接類別切換到合適的解析方法。

讓我們為科學頁面準備物件模型:

/// <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

現在讓我們實現單頁抓取:

/// <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

在創建完模型之後,我們可以解析響應物件,以深入到其主要元素(標題、作者、日期、圖片、文本)。

然後,我們使用 Scrape(object, fileName) 另存結果至獨立文件中。

點擊這裡查看完整的 IronWebscraper 使用教程

開始使用 IronWebscraper

Webscraping 一直以來都不是一項簡單的任務,因為 C# 或 .NET 編程環境中沒有主流的框架可供使用。 Iron Web Scraper 創建是為了改變這一現象

常見問題解答

如何在 C# 中創建一個博客網路抓取器?

要在 C# 中創建一個博客網路抓取器,可以使用 IronWebScraper 庫。首先定義一個擴展 WebScraper 類的類,設置一個開始網址,配置抓取器以處理不同頁面類型,並使用 Parse 方法從 HTTP 回應中提取所需信息。

在網路抓取中 Parse 方法的功能是什麼?

在使用 IronWebScraper 進行網路抓取時,Parse 方法對於處理 HTTP 回應至關重要。它通過解析頁面內容、識別連結和分類頁面類型(如博客文章或其他部分)來幫助提取數據。

如何高效管理網路抓取的數據?

IronWebScraper 允許通過配置緩存來存儲請求的頁面並設置工作目錄以輸出文件來有效管理數據。這種組織有助於跟踪抓取的數據並減少不必要的頁面重新獲取。

IronWebScraper 如何幫助抓取 WordPress 博客?

IronWebScraper 通過提供工具來簡化抓取 WordPress 博客的結構、提取文章詳情和處理各種頁面類型。您可以使用該庫來解析文章以提取標題、作者、日期、圖片和文本等信息。

我可以將 IronWebScraper 用於 C# 和 VB.NET 嗎?

是的,IronWebScraper 與 C# 和 VB.NET 兼容,這使得它對於喜歡使用這些 .NET 語言的開發人員來說是一個多功能的選擇。

如何處理博客中的不同頁面類型?

您可以通過在 IronWebScraper 中重寫 Parse 方法來處理博客中的不同頁面類型。這種方法允許您將頁面分類為不同的部分,如評論和科學,並應用特定的解析邏輯。

有沒有辦法將抓取的博客數據保存為結構化格式?

是的,使用 IronWebScraper,您可以將抓取的博客數據保存為像 JSONL 這樣的結構化格式。這種格式在行與行之間以 JSON 格式存儲每條數據,便於後續管理和處理。

如何為我的網路抓取器設置工作目錄?

在 IronWebScraper 中,您可以通過配置抓取器來設置工作目錄,指定應該存儲輸出和緩存文件的位置。這有助於有效地組織抓取的數據。

網絡抓取中的一些常見故障排除情境有什麼?

網絡抓取中的常見故障排除情境包括處理網站結構更改、管理速率限制和處理防抓取措施。使用 IronWebScraper,您可以實施錯誤處理和日誌記錄來診斷和解決這些問題。

我在哪裡可以找到更多關於使用 IronWebScraper 的資源?

您可以在 Iron Software 的網站上找到有關使用 IronWebScraper 的資源和教程,這些網站為您提供了詳細的指導和示例,位於網絡抓取教程部分。

Darrius Serrant
全棧軟件工程師 (WebOps)

Darrius Serrant 擁有邁阿密大學計算機科學學士學位,目前任職於 Iron Software 的全栈 WebOps 市場營銷工程師。從小就迷上編碼,他認為計算既神秘又可接近,是創意和解決問題的完美媒介。

在 Iron Software,Darrius 喜歡創造新事物,並簡化複雜概念以便於理解。作為我們的駐場開發者之一,他也自願教學生,分享他的專業知識給下一代。

對 Darrius 來說,工作令人滿意因為它被重視且有實際影響。

準備好開始了嗎?
Nuget 下載 122,916 | 版本: 2025.11 剛剛發布