HTML to PDF Rocket - PDF 生成

Question

我正在尝试从包含图像和 css 文件（如“bootstrap”）的 azure 网站将 HTML 转换为 PDF。

我的代码（与本案例的教程相同 - MVC c# - http://www.html2pdfrocket.com/Examples/CSharp）

string apiKey = "MY KEY";
string value = html; // SOME HTML IN STRING FORMAT

using (var client = new WebClient())
            {
                // Build the conversion options
                NameValueCollection options = new NameValueCollection();
                options.Add("apikey", apiKey);
                options.Add("value", value);

                // Call the API convert to an image
                byte[] result = client.UploadValues("http://api.html2pdfrocket.com/pdf", options);

                // Save the image to disk
                System.IO.File.WriteAllBytes(Server.MapPath("~/PDF/somepdf.pdf"), result);
            }

代码正在生成 pdf 文件，但没有 css 样式和图像。

我该如何解决这个问题？

html真的很简单，只有一张表格，一张图片和一个css文件“bootstrap”

我要在html中显示的图片是这样放置的：

 <img id="image" src="~/Images/someimage.jpg" >

CSS 文件是：

<link href="~/Scripts/bootstrap/dist/css/bootstrap.css" rel="stylesheet" />

我也有一些这样的 CSS 类：

#header {
    padding: 0;
    margin: 0;
    float: left;
    position: relative;
    min-height: 1px;
    font-size: 12px;
}

我已经尝试放置图像和“引导程序”的完整路径，但它仍然无法正常工作。

Answer 1

您只需将所有链接更改为完整地址，例如

<link href="https://www.example.com/Scripts/bootstrap/dist/css/bootstrap.css" rel="stylesheet" />

或者创建一个 html 页面并将这个 html 页面的 url 发送到 API。

Answer 2

对于 Azure 网站，您可以使用 EvoPdf 的 HTML to PDF for Azure 解决方案。您可以从网站下载的软件包包含一个演示 Azure 网站。演示源代码如下：

protected void convertToPdfButton_Click(object sender, EventArgs e)
{
    // Get the server IP and port
    String serverIP = textBoxServerIP.Text;
    uint serverPort = uint.Parse(textBoxServerPort.Text);

    // Create a HTML to PDF converter object with default settings
    HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter(serverIP, serverPort);

    // Set optional service password
    if (textBoxServicePassword.Text.Length > 0)
        htmlToPdfConverter.ServicePassword = textBoxServicePassword.Text;

    // Set HTML Viewer width in pixels which is the equivalent in converter of the browser window width
    htmlToPdfConverter.HtmlViewerWidth = int.Parse(htmlViewerWidthTextBox.Text);

    // Set HTML viewer height in pixels to convert the top part of a HTML page 
    // Leave it not set to convert the entire HTML
    if (htmlViewerHeightTextBox.Text.Length > 0)
        htmlToPdfConverter.HtmlViewerHeight = int.Parse(htmlViewerHeightTextBox.Text);

    // Set PDF page size which can be a predefined size like A4 or a custom size in points 
    // Leave it not set to have a default A4 PDF page
    htmlToPdfConverter.PdfDocumentOptions.PdfPageSize = SelectedPdfPageSize();

    // Set PDF page orientation to Portrait or Landscape
    // Leave it not set to have a default Portrait orientation for PDF page
    htmlToPdfConverter.PdfDocumentOptions.PdfPageOrientation = SelectedPdfPageOrientation();

    // Set the maximum time in seconds to wait for HTML page to be loaded 
    // Leave it not set for a default 60 seconds maximum wait time
    htmlToPdfConverter.NavigationTimeout = int.Parse(navigationTimeoutTextBox.Text);

    // Set an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed
    // Set this property to 0 if you don't need to wait for such asynchcronous operations to finish
    if (conversionDelayTextBox.Text.Length > 0)
        htmlToPdfConverter.ConversionDelay = int.Parse(conversionDelayTextBox.Text);

    // The buffer to receive the generated PDF document
    byte[] outPdfBuffer = null;

    if (convertUrlRadioButton.Checked)
    {
        string url = urlTextBox.Text;

        // Convert the HTML page given by an URL to a PDF document in a memory buffer
        outPdfBuffer = htmlToPdfConverter.ConvertUrl(url);
    }
    else
    {
        string htmlString = htmlStringTextBox.Text;
        string baseUrl = baseUrlTextBox.Text;

        // Convert a HTML string with a base URL to a PDF document in a memory buffer
        outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlString, baseUrl);
    }

    // Send the PDF as response to browser

    // Set response content type
    Response.AddHeader("Content-Type", "application/pdf");

    // Instruct the browser to open the PDF file as an attachment or inline
    Response.AddHeader("Content-Disposition", String.Format("{0}; filename=Getting_Started.pdf; size={1}",
        openInlineCheckBox.Checked ? "inline" : "attachment", outPdfBuffer.Length.ToString()));

    // Write the PDF document buffer to HTTP response
    Response.BinaryWrite(outPdfBuffer);

    // End the HTTP response and stop the current page processing
    Response.End();
}