download html file as pdf using abcpdf

问题

How can I download an HTML file as a PDF using abcpdf in ASP.Net, C#?

回答1:

The following ASP.NET example in C# shows how you might create a PDF from a web page and stream it to a web browser...

<% @Page Language="C#" %>
<% @Import Namespace="WebSupergoo.ABCpdf7" %>
<%
Doc theDoc = new Doc();
theDoc.AddImageUrl("http://www.example.com");
byte[] theData = theDoc.GetData();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "inline; filename=MyPDF.PDF");
Response.AddHeader("content-length", theData.Length.ToString());
Response.BinaryWrite(theData);
Response.End();
%>

Changing content-disposition from 'inline' to 'attachment' will change the behavior.

There's some further information in the product documentation on the Doc.GetData() function that you'll need to be aware of, and you may also find the 'Paged HTML Example' helpful.

回答2:

This method works well in our project

    /// <summary>
    /// Converts Html to pdf
    /// </summary>
    /// <param name="htmlOrUrl">Html markup of html page URL</param>
    /// <param name="isUrl">previous parameter is URL</param>
    /// <param name="highQuality">use high quality converter engine</param>
    /// <param name="indent">indent from all sides of the page</param>
    /// <returns>Memory stream with PDF-file</returns>
    public static MemoryStream HtmlToPDF(this String htmlOrUrl, Boolean isUrl, Boolean highQuality = false, Int32 indent = 20)
    {
        using (var doc = new Doc())
        {
            doc.Color.String = "0, 0, 0";
            doc.HtmlOptions.UseScript = true;
            doc.HtmlOptions.AddLinks = true;
            if (highQuality)
            {
                doc.HtmlOptions.Engine = EngineType.Gecko;
            }

            // 1. CONTENT BLOCK
            doc.Rect.Left = 0 + indent;
            doc.Rect.Top = 792 - indent;
            doc.Rect.Right = 612 - indent;
            doc.Rect.Bottom = 0 + indent;

            doc.AppendChainable(htmlOrUrl, isUrl);

            var ms = new MemoryStream();
            doc.Save(ms);
            if (ms.CanSeek)
            {
                ms.Seek(0, SeekOrigin.Begin);
            }
            return ms;
        }
    }

    /// <summary>
    /// Appends document with multipage content 
    /// </summary>
    private static void AppendChainable(this Doc doc, String htmlOrUrl, Boolean isUrl = false)
    {
        Int32 blockId = isUrl 
            ? doc.AddImageUrl(htmlOrUrl) 
            : doc.AddImageHtml(String.Format(HtmlWrapper, htmlOrUrl));

        while (doc.Chainable(blockId))
        {
            //doc.FrameRect(); // add a black border
            doc.Page = doc.AddPage();
            blockId = doc.AddImageToChain(blockId);
        }
    }

// usage

var testMs1 = ABCPdfConverter.ABCConverter.HtmlToPDF("https://developers.google.com
   /chart/interactive/docs/examples", true, false, 20);
testMs1.StreamToFile(@"D:/3.pdf");

// and Stream to file is

/// <summary>
/// Saves stream instance to file
/// </summary>
public static void StreamToFile(this MemoryStream input, String outputFileName)
{
    var dirName = Path.GetDirectoryName(outputFileName);
    var fileName = Path.GetFileName(outputFileName);
    if (String.IsNullOrEmpty(dirName) || String.IsNullOrWhiteSpace(fileName))
    {
        throw new IOException("outputFileName");
    }

    using (FileStream outStream = File.Create(outputFileName))
    {
        input.WriteTo(outStream);
        outStream.Flush();
        outStream.Close();
    }
}

回答3:

This is how you use ABCPdf to accomplish that goal.

http://www.websupergoo.com/helppdf7net/source/4-examples/13-pagedhtml.htm

Doc theDoc = new Doc();
theDoc.Rect.Inset(72, 144);

theDoc.Page = theDoc.AddPage();
int theID;
theID = theDoc.AddImageUrl("http://www.yahoo.com/");

while (true) {
  theDoc.FrameRect(); // add a black border
  if (!theDoc.Chainable(theID))
    break;
  theDoc.Page = theDoc.AddPage();
  theID = theDoc.AddImageToChain(theID);
}

for (int i = 1; i <= theDoc.PageCount; i++) {
  theDoc.PageNumber = i;
  theDoc.Flatten();
}

theDoc.Save(Server.MapPath("pagedhtml.pdf"));
theDoc.Clear();

来源：https://stackoverflow.com/questions/2742375/download-html-file-as-pdf-using-abcpdf

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