有没有免费的方法可以使用 .net 将 html 页面转换为图像

发布于 2024-07-05 14:13:47 字数 340 浏览 7 评论 0原文

我想获取 html,包括文本和图像,并将其转换为包含所有内容的一张图像。 有免费的方法吗?

这是使用 .net 3.5。

另请参阅:

服务器生成的网页屏幕截图?
创建网页的最佳方式是什么缩略图?

I want to take html, including the text and images and turn it into one image containing everything. Is there a free way to do it?

This is using .net 3.5.

See also:

Server Generated web screenshots?
What is the best way to create a web page thumbnail?

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陈独秀 2024-07-12 14:13:48

以下是我几周前在博客上发布的一些代码:

C#:生成网页缩略图屏幕截图

我还将在下面发布它的代码:

public Bitmap GenerateScreenshot(string url)
{
    // This method gets a screenshot of the webpage
    // rendered at its full size (height and width)
    return GenerateScreenshot(url, -1, -1);
}

public Bitmap GenerateScreenshot(string url, int width, int height)
{
    // Load the webpage into a WebBrowser control
    WebBrowser wb = new WebBrowser();
    wb.ScrollBarsEnabled = false;
    wb.ScriptErrorsSuppressed = true;
    wb.Navigate(url);
    while (wb.ReadyState != WebBrowserReadyState.Complete) { Application.DoEvents(); }


    // Set the size of the WebBrowser control
    wb.Width = width;
    wb.Height = height;

    if (width == -1)
    {
        // Take Screenshot of the web pages full width
        wb.Width = wb.Document.Body.ScrollRectangle.Width;
    }

    if (height == -1)
    {
        // Take Screenshot of the web pages full height
        wb.Height = wb.Document.Body.ScrollRectangle.Height;
    }

    // Get a Bitmap representation of the webpage as it's rendered in the WebBrowser control
    Bitmap bitmap = new Bitmap(wb.Width, wb.Height);
    wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height));
    wb.Dispose();

    return bitmap;
}

以下是一些示例用法:

// Generate thumbnail of a webpage at 1024x768 resolution
Bitmap thumbnail = GenerateScreenshot("http://pietschsoft.com", 1024, 768);

// Generate thumbnail of a webpage at the webpage's full size (height and width)
thumbnail = GenerateScreenshot("http://pietschsoft.com");

// Display Thumbnail in PictureBox control
pictureBox1.Image = thumbnail;

/*
// Save Thumbnail to a File
thumbnail.Save("thumbnail.png", System.Drawing.Imaging.ImageFormat.Png);
*/

Here's some code that I posted on my blog a few weeks ago that does this:

C#: Generate WebPage Thumbnail Screenshot Image

I'll also post the code for it below:

public Bitmap GenerateScreenshot(string url)
{
    // This method gets a screenshot of the webpage
    // rendered at its full size (height and width)
    return GenerateScreenshot(url, -1, -1);
}

public Bitmap GenerateScreenshot(string url, int width, int height)
{
    // Load the webpage into a WebBrowser control
    WebBrowser wb = new WebBrowser();
    wb.ScrollBarsEnabled = false;
    wb.ScriptErrorsSuppressed = true;
    wb.Navigate(url);
    while (wb.ReadyState != WebBrowserReadyState.Complete) { Application.DoEvents(); }


    // Set the size of the WebBrowser control
    wb.Width = width;
    wb.Height = height;

    if (width == -1)
    {
        // Take Screenshot of the web pages full width
        wb.Width = wb.Document.Body.ScrollRectangle.Width;
    }

    if (height == -1)
    {
        // Take Screenshot of the web pages full height
        wb.Height = wb.Document.Body.ScrollRectangle.Height;
    }

    // Get a Bitmap representation of the webpage as it's rendered in the WebBrowser control
    Bitmap bitmap = new Bitmap(wb.Width, wb.Height);
    wb.DrawToBitmap(bitmap, new Rectangle(0, 0, wb.Width, wb.Height));
    wb.Dispose();

    return bitmap;
}

Here's some example usages:

// Generate thumbnail of a webpage at 1024x768 resolution
Bitmap thumbnail = GenerateScreenshot("http://pietschsoft.com", 1024, 768);

// Generate thumbnail of a webpage at the webpage's full size (height and width)
thumbnail = GenerateScreenshot("http://pietschsoft.com");

// Display Thumbnail in PictureBox control
pictureBox1.Image = thumbnail;

/*
// Save Thumbnail to a File
thumbnail.Save("thumbnail.png", System.Drawing.Imaging.ImageFormat.Png);
*/
累赘 2024-07-12 14:13:47

您可以查看此项目此页面

希望有帮助。

You might check out this project or this page.

Hope that helps.

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