Question

我希望使用Winnovative PDF Converter

从HTML生成PDF文档

我希望将PDF转换为842 x 595像素

我尝试过：

pdfConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A5

但这不合适。所以我试过了：

    pdfConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.Custom
    pdfConverter.PdfDocumentOptions.CustomPdfPageSize = New SizeF(842, 595)

然而，这不能正常工作，因为我认为尺寸是以不同的格式测量到像素？

如何生成精确的842 x 595像素的PDF，以便与我的HTML内容相匹配？

Answer 1

将HTML内容呈现为PDF时涉及到两件事。 PDF页面大小和转换器内部HTML查看器宽度。启用FitWidth后，可以缩小HTML内容以适合PDF页面宽度。

PDF页面大小以点（1点为1/72英寸）表示，内部HTML查看器窗口大小以像素表示（i像素为1/96英寸）。

PDF页面A4 potrait大小为595 x 842点，对应于595点的HTML查看器宽度为595 x 96/72 = 793像素。

所以转换器的设置是：

pdfConverter.HtmlViewerWidth = 793 pdfConverter.PdfDocumentOptions.PdfPageSize = new PdfPageSize（595,842）

您可以在Control HTML Scaling in PDF Page demo中找到所有HTML缩放和拟合选项以及示例代码的说明。以下是该演示的相关代码的副本：

protected void convertToPdfButton_Click(object sender, EventArgs e)
{
    // Create a HTML to PDF converter object with default settings
    HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

    // Set license key received after purchase to use the converter in licensed mode
    // Leave it not set to use the converter in demo mode
    htmlToPdfConverter.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=";

    // Html Viewer Options

    // Set HTML Viewer width in pixels which is the equivalent in converter of the browser window width
    // This is a preferred width of the browser but the actual HTML content width can be larger in case the HTML page 
    // cannot be entirely displayed in the given viewer width
    // This property gives the size of the HTML content which can be further scaled to fit the PDF page based on selected options
    // The HTML content size is in pixels and the PDF page size is in points (1 point = 1/72 inches)
    // The converter is using a 96 DPI resolution to transform pixels to points with the following formula: Points = Pixels/96 * 72            
    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 the HTML content clipping option to force the HTML content width to be exactly HtmlViewerWidth pixels
    // If this option is false then the actual HTML content width can be larger than HtmlViewerWidth pixels in case the HTML page 
    // cannot be entirely displayed in the given viewer width
    // By default this option is false and the HTML content is not clipped
    htmlToPdfConverter.ClipHtmlView = clipContentCheckBox.Checked;

    // PDF Page Options

    // 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 PDF page margins in points or leave them not set to have a PDF page without margins
    htmlToPdfConverter.PdfDocumentOptions.LeftMargin = float.Parse(leftMarginTextBox.Text);
    htmlToPdfConverter.PdfDocumentOptions.RightMargin = float.Parse(rightMarginTextBox.Text);
    htmlToPdfConverter.PdfDocumentOptions.TopMargin = float.Parse(topMarginTextBox.Text);
    htmlToPdfConverter.PdfDocumentOptions.BottomMargin = float.Parse(bottomMarginTextBox.Text);

    // HTML Content Destination and Spacing Options

    // Set HTML content destination in PDF page
    if (xLocationTextBox.Text.Length > 0)
        htmlToPdfConverter.PdfDocumentOptions.X = float.Parse(xLocationTextBox.Text);
    if (yLocationTextBox.Text.Length > 0)
        htmlToPdfConverter.PdfDocumentOptions.Y = float.Parse(yLocationTextBox.Text);
    if (contentWidthTextBox.Text.Length > 0)
        htmlToPdfConverter.PdfDocumentOptions.Width = float.Parse(contentWidthTextBox.Text);
    if (contentHeightTextBox.Text.Length > 0)
        htmlToPdfConverter.PdfDocumentOptions.Height = float.Parse(contentHeightTextBox.Text);

    // Set HTML content top and bottom spacing or leave them not set to have no spacing for the HTML content
    htmlToPdfConverter.PdfDocumentOptions.TopSpacing = float.Parse(topSpacingTextBox.Text);
    htmlToPdfConverter.PdfDocumentOptions.BottomSpacing = float.Parse(bottomSpacingTextBox.Text);

    // Scaling Options

    // Use this option to fit the HTML content width in PDF page width
    // By default this property is true and the HTML content can be resized to fit the PDF page width
    htmlToPdfConverter.PdfDocumentOptions.FitWidth = fitWidthCheckBox.Checked;

    // Use this option to enable the HTML content stretching when its width is smaller than PDF page width
    // This property has effect only when FitWidth option is true
    // By default this property is false and the HTML content is not stretched
    htmlToPdfConverter.PdfDocumentOptions.StretchToFit = stretchCheckBox.Checked;

    // Use this option to automatically dimension the PDF page to display the HTML content unscaled
    // This property has effect only when the FitWidth property is false
    // By default this property is true and the PDF page is automatically dimensioned when FitWidth is false
    htmlToPdfConverter.PdfDocumentOptions.AutoSizePdfPage = autoSizeCheckBox.Checked;

    // Use this option to fit the HTML content height in PDF page height
    // If both FitWidth and FitHeight are true then the HTML content will resized if necessary to fit both width and height 
    // preserving the aspect ratio at the same time
    // By default this property is false and the HTML content is not resized to fit the PDF page height
    htmlToPdfConverter.PdfDocumentOptions.FitHeight = fitHeightCheckBox.Checked;

    // Use this option to render the whole HTML content into a single PDF page
    // The PDF page size is limited to 14400 points
    // By default this property is false
    htmlToPdfConverter.PdfDocumentOptions.SinglePage = singlePageCheckBox.Checked;

    string url = urlTextBox.Text;

    // Convert the HTML page to a PDF document using the scaling options
    byte[] outPdfBuffer = htmlToPdfConverter.ConvertUrl(url);

    // 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=HTML_Content_Scaling.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();
}

Answer 2

如果将PdfConverter.PageWidth和PdfConverter.PageHeight属性设置为842和595，那么这应该会导致您的Web内容填满整个PDF页面区域。

还有一个FitWidth属性，如果您希望不缩小Web内容以适合可用的页面区域，则可以将其设置为False。这意味着如果页面太大，您的内容将溢出页面。

关于Winnovative PDF的另一个观点是，使用高分辨率图像并不容易，因此根据您的PDF需求（和输入），您可能很难获得高质量的图像 - 也许这仅仅来自我的经验

说到图像，似乎Winnovative PDF会将您的输入html创建一个单独的图像，然后以屏幕分辨率（72 dpi）添加到PDF中，这甚至可以使简单的文本看起来质量低。 / p>

如果您想亲自处理html布局，您可以使用ITextSharp之类的其他产品将内容直接转换为PDF，这样可以在更高分辨率的图像上提供更大的灵活性。我确实依赖于你的整体需求

生成Winnovative PDF为某个宽度/高度像素大小

2 个答案: