同一pdf中的横向和纵向

Question

我需要从我们应用程序中的 URL 生成 pdf 报告。是否可以在生成的同一个 pdf 文档中同时拥有横向和纵向页面？

我希望将条形图设为纵向，将表格设为横向（水平）。查看 EVO 文档，我不知道这是否可能。

我知道你可以定义横向或纵向

htmlToPdfConverter.PdfDocumentOptions.PdfPageOrientation

但这适用于整个文档。我想要一些我可以定义的 html，它会告诉 EVO 将此部分打印为 Landscape。

Answer 1

您可以在同一个 PDF 中包含纵向和横向部分。为此，您可以创建一个空白 Document 对象并向该文档添加具有所需方向的 PDF 页面。在新创建的 PDF 页面上，您可以添加一个 HtmlToPdfElement 对象来呈现 HTML，并自动添加与您最初创建的 PDF 页面具有相同方向的 PDF 页面。可以对不同方向的 PDF 页面重复该过程。在Merge Multiple HTML Pages into a Single PDF 演示中有一个带有此方法的 C# 代码的实时示例。代码示例也复制如下：

protected void convertToPdfButton_Click(object sender, EventArgs e)
{
    // Create the PDF document where to add the HTML documents
    Document pdfDocument = new Document();

    // Create a PDF page where to add the first HTML
    PdfPage firstPdfPage = pdfDocument.AddPage();

    try
    {
        // Create the first HTML to PDF element
        HtmlToPdfElement firstHtml = new HtmlToPdfElement(0, 0, firstUrlTextBox.Text);

        // Optionally set a delay before conversion to allow asynchonous scripts to finish
        firstHtml.ConversionDelay = 2;

        // Add the first HTML to PDF document
        AddElementResult firstAddResult = firstPdfPage.AddElement(firstHtml);

        PdfPage secondPdfPage = null;
        PointF secondHtmlLocation = Point.Empty;

        if (startNewPageCheckBox.Checked)
        {
            // Create a PDF page where to add the second HTML
            secondPdfPage = pdfDocument.AddPage();
            secondHtmlLocation = PointF.Empty;
        }
        else
        {
            // Add the second HTML on the PDF page where the first HTML ended
            secondPdfPage = firstAddResult.EndPdfPage;
            secondHtmlLocation = new PointF(firstAddResult.EndPageBounds.Left, firstAddResult.EndPageBounds.Bottom);
        }

        // Create the second HTML to PDF element
        HtmlToPdfElement secondHtml = new HtmlToPdfElement(secondHtmlLocation.X, secondHtmlLocation.Y, secondUrlTextBox.Text);

        // Optionally set a delay before conversion to allow asynchonous scripts to finish
        secondHtml.ConversionDelay = 2;

        // Add the second HTML to PDF document
        secondPdfPage.AddElement(secondHtml);

        // Save the PDF document in a memory buffer
        byte[] outPdfBuffer = pdfDocument.Save();

        // 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("attachment; filename=Merge_Multipe_HTML.pdf; size={0}", 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();
    }
    finally
    {
        // Close the PDF document
        pdfDocument.Close();
    }
}