如何在ASP.net[duplicate]中使用wkhtmltopdf.exe

你也可以用 Pechkin

用于WkHtmlToPdf DLL的.NET包装器,该库使用Webkit引擎 将HTML页转换为PDF。

Nuget包:

Pechkin.Synchronized

Pechkin

我刚刚开始了一个新项目,提供了一个围绕wkhtmltopdf的C#P/Invoke包装器。

您可以在以下网址查看我的代码: https://github.com/pruiz/WkHtmlToXSharp

问候。

感谢 Paul wrapper 由Codaxy编写,也可以通过 NuGet .

经过几次尝试后,我管理了这个MVC操作,它可以立即创建PDF文件并以流的形式返回:

public ActionResult Pdf(string url, string filename)
{
    MemoryStream memory = new MemoryStream();
    PdfDocument document = new PdfDocument() { Url = url };
    PdfOutput output = new PdfOutput() { OutputStream = memory };

    PdfConvert.ConvertHtmlToPdf(document, output);
    memory.Position = 0;

    return File(memory, "application/pdf", Server.UrlEncode(filename));
}

最后,我们必须将流作为FileStreamResult推送。

不要忘记将输出流的位置设置为零,否则您将看到下载的PDF文件大小为零字节。

这是我实际使用的代码。请随时编辑这个摆脱一些气味和其他可怕的…我知道它不是那么好。

using System;
using System.Diagnostics;
using System.IO;
using System.Web;
using System.Web.UI;

public partial class utilities_getPDF : Page
{
    protected void Page_Load(Object sender, EventArgs e)
    {
        string fileName = WKHtmlToPdf(myURL);

        if (!string.IsNullOrEmpty(fileName))
        {
            string file = Server.MapPath("~\\utilities\\GeneratedPDFs\\" + fileName);
            if (File.Exists(file))
            {
                var openFile = File.OpenRead(file);
                // copy the stream (thanks to http://stackoverflow.com/questions/230128/best-way-to-copy-between-two-stream-instances-c)
                byte[] buffer = new byte[32768];
                while (true)
                {
                    int read = openFile.Read(buffer, 0, buffer.Length);
                    if (read <= 0)
                    {
                        break;
                    }
                    Response.OutputStream.Write(buffer, 0, read);
                }
                openFile.Close();
                openFile.Dispose();

                File.Delete(file);
            }
        }
    }

    public string WKHtmlToPdf(string Url)
    {
        var p = new Process();

        string switches = "";
        switches += "--print-media-type ";
        switches += "--margin-top 10mm --margin-bottom 10mm --margin-right 10mm --margin-left 10mm ";
        switches += "--page-size Letter ";
        // waits for a javascript redirect it there is one
        switches += "--redirect-delay 100";

        // Utils.GenerateGloballyUniuqueFileName takes the extension from
        // basically returns a filename and prepends a GUID to it (and checks for some other stuff too)
        string fileName = Utils.GenerateGloballyUniqueFileName("pdf.pdf");

        var startInfo = new ProcessStartInfo
                        {
                            FileName = Server.MapPath("~\\utilities\\PDF\\wkhtmltopdf.exe"),
                            Arguments = switches + " " + Url + " \"" +
                                        "../GeneratedPDFs/" + fileName
                                        + "\"",
                            UseShellExecute = false, // needs to be false in order to redirect output
                            RedirectStandardOutput = true,
                            RedirectStandardError = true,
                            RedirectStandardInput = true, // redirect all 3, as it should be all 3 or none
                            WorkingDirectory = Server.MapPath("~\\utilities\\PDF")
                        };
        p.StartInfo = startInfo;
        p.Start();

        // doesn't work correctly...
        // read the output here...
        // string output = p.StandardOutput.ReadToEnd();

        //  wait n milliseconds for exit (as after exit, it can't read the output)
        p.WaitForExit(60000);

        // read the exit code, close process
        int returnCode = p.ExitCode;
        p.Close();

        // if 0, it worked
        return (returnCode == 0) ? fileName : null;
    }
}

我不能评论,所以我把这个作为对上述答案评论的“回答” How to use wkhtmltopdf.exe in ASP.net

如果 --redirect-delay 不行,试试看 --javascript-delay https://github.com/antialize/wkhtmltopdf/blob/master/README_WKHTMLTOPDF

或者做 wkhtmltopdf -H 扩展帮助(与上面链接的输出相同)。