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Old July 28th, 2016, 08:47 AM
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Default HTML to PDF Library for .NET

You can get the most accurate HTML to PDF conversion with HiQPdf HTML to PDF Converter for .NET offers the. For small tasks you can use the free HTML to PDF .NET library in your applications. The free version doesn't offer all the features of the full library but it is enough to create small PDFs. The C# sample code for converting HTML to PDF in ASP.NET is:

protected void buttonConvertToPdf_Click(object sender, EventArgs e)
    // create the HTML to PDF converter
    HtmlToPdf htmlToPdfConverter = new HtmlToPdf();

    // set browser width
    htmlToPdfConverter.BrowserWidth = int.Parse(textBoxBrowserWidth.Text);

    // set browser height if specified, otherwise use the default
    if (textBoxBrowserHeight.Text.Length > 0)
        htmlToPdfConverter.BrowserHeight = int.Parse(textBoxBrowserHeight.Text);

    // set HTML Load timeout
    htmlToPdfConverter.HtmlLoadedTimeout = int.Parse(textBoxLoadHtmlTimeout.Text);

    // set PDF page size and orientation
    htmlToPdfConverter.Document.PageSize = GetSelectedPageSize();
    htmlToPdfConverter.Document.PageOrientation = GetSelectedPageOrientation();

    // set the PDF standard used by the document
    htmlToPdfConverter.Document.PdfStandard = checkBoxPdfA.Checked ? PdfStandard.PdfA : PdfStandard.Pdf;

    // set PDF page margins
    htmlToPdfConverter.Document.Margins = new PdfMargins(5);

    // set whether to embed the true type font in PDF
    htmlToPdfConverter.Document.FontEmbedding = checkBoxFontEmbedding.Checked;

    // set triggering mode; for WaitTime mode set the wait time before convert
    switch (dropDownListTriggeringMode.SelectedValue)
        case "Auto":
            htmlToPdfConverter.TriggerMode = ConversionTriggerMode.Auto;
        case "WaitTime":
            htmlToPdfConverter.TriggerMode = ConversionTriggerMode.WaitTime;
            htmlToPdfConverter.WaitBeforeConvert = int.Parse(textBoxWaitTime.Text);
        case "Manual":
            htmlToPdfConverter.TriggerMode = ConversionTriggerMode.Manual;
            htmlToPdfConverter.TriggerMode = ConversionTriggerMode.Auto;

    // set header and footer

    // set the document security
    htmlToPdfConverter.Document.Security.OpenPassword = textBoxOpenPassword.Text;
    htmlToPdfConverter.Document.Security.AllowPrinting = checkBoxAllowPrinting.Checked;

    // set the permissions password too if an open password was set
    if (htmlToPdfConverter.Document.Security.OpenPassword != null && htmlToPdfConverter.Document.Security.OpenPassword != String.Empty)
        htmlToPdfConverter.Document.Security.PermissionsPassword = htmlToPdfConverter.Document.Security.OpenPassword + "_admin";

    // convert HTML to PDF
    byte[] pdfBuffer = null;

    if (radioButtonConvertUrl.Checked)
        // convert URL to a PDF memory buffer
        string url = textBoxUrl.Text;

        pdfBuffer = htmlToPdfConverter.ConvertUrlToMemory(url);
        // convert HTML code
        string htmlCode = textBoxHtmlCode.Text;
        string baseUrl = textBoxBaseUrl.Text;

        // convert HTML code to a PDF memory buffer
        pdfBuffer = htmlToPdfConverter.ConvertHtmlToMemory(htmlCode, baseUrl);

    // inform the browser about the binary data format
    HttpContext.Current.Response.AddHeader("Content-Type", "application/pdf");

    // let the browser know how to open the PDF document, attachment or inline, and the file name
    HttpContext.Current.Response.AddHeader("Content-Disposition", String.Format("{0}; filename=HtmlToPdf.pdf; size={1}",
        checkBoxOpenInline.Checked ? "inline" : "attachment", pdfBuffer.Length.ToString()));

    // write the PDF buffer to HTTP response

    // call End() method of HTTP response to stop ASP.NET page processing