blocks|key|102410|text|在CodeProject上有一个详细的step-by-step+tutorial，你可以参考。它说明了如何使用iTextSharp将PDF作为ASP.NET文件进行转换。但是请记住，iTextSharp并不是用来将HTML转换成PDF的，因此它可能不能很好地处理复杂的HTML页面和CSS样式。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|102411|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeproject.com/Articles/66948/Rendering-PDF-views-in-ASP-MVC-using-iTextSharp^0|J|L|J|L|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

There's a detailed and <a href="http://www.codeproject.com/Articles/66948/Rendering-PDF-views-in-ASP-MVC-using-iTextSharp" rel="nofollow"><code>step-by-step tutorial</code></a> on CodeProject you might follow. It illustrates how you could serve an ASP.NET MVC View as PDF file using iTextSharp for the conversion. Bear in mind though that iTextSharp was not meant for converting HTML to PDF so it might not cope very well with complex HTML pages and CSS styles.

blocks|key|102439|text|你应该看看RazorPDF，它使用iText生成PDF，但方式更友好。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|102440|entityMap|0|LINK|mutability|MUTABLE|url|http://www.nyveldt.com/blog/post/Introducing-RazorPDF^0|5|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

You should check out <a href="http://www.nyveldt.com/blog/post/Introducing-RazorPDF" rel="nofollow">RazorPDF</a> which is using iText to generate the PDF, but in a friendlier way.

blocks|key|319551|text|public+virtual+void+printpdf(string+html)++++
{
+++++String+htmlText+=+html.ToString();
+++++Document+document+=+new+Document();
+++++string+filePath+=+HostingEnvironment.MapPath("~/Content/Pdf/");
+++++PdfWriter.GetInstance(document,+new+FileStream(filePath+%2B+"\\pdf-"%2BFilename%2B".pdf",+FileMode.Create));

+++++document.Open();++++
+++++iTextSharp.text.html.simpleparser.HTMLWorker+hw+=+new+iTextSharp.text.html.simpleparser.HTMLWorker(document);+++++++
+++++hw.Parse(new+StringReader(htmlText));++++
+++++document.Close();++++
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|319552|只需将html+string传递给将通过renderpartialview+text+=+viewname....获得字符串的参数|unstyled|offset|length|style|CODE|319553|entityMap^0|0|3|B|12|J|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]|$G|Q|H|R|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|S|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>public virtual void printpdf(string html) 
{
 String htmlText = html.ToString();
 Document document = new Document();
 string filePath = HostingEnvironment.MapPath("~/Content/Pdf/");
 PdfWriter.GetInstance(document, new FileStream(filePath + "\\pdf-"+Filename+".pdf", FileMode.Create));

 document.Open(); 
 iTextSharp.text.html.simpleparser.HTMLWorker hw = new iTextSharp.text.html.simpleparser.HTMLWorker(document); 
 hw.Parse(new StringReader(htmlText)); 
 document.Close(); 
}
</code></pre>

just pass <code>html string</code> in to parameter 
that string you will get by renderpartialview <code>text = viewname....</code>

blocks|key|102523|text|从MVC+HTML视图转换为PDF的一个好方法(即使它不是直接关于iTextSharp的主题)是使用Rotativa：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|102524|Install-Package+Rotativa|code-block|syntax|javascript|102525|这是基于wkhtmltopdf的，但它比iTextSharp有更好的css支持，并且很容易与MVC集成，因为你可以简单地将视图返回为pdf：|style|CODE|102526|public+ActionResult+GetPdf()
{
++++//...
++++return+new+ViewAsPdf(model);//+and+you+are+done!
}|102527|entityMap|0|LINK|mutability|MUTABLE|url|https://www.nuget.org/packages/Rotativa/^0|1E|8|0|0|0|4|B|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@$A|12|B|13|K|L]]|9|@]|C|$]]|$1|M|3|N|5|F|7|14|8|@]|9|@]|C|$G|H]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

A good way to convert from MVC HTML View to PDF (even if it's not directly on the subject regarding iTextSharp) is using <a href="https://www.nuget.org/packages/Rotativa/" rel="nofollow">Rotativa</a> :

<pre><code>Install-Package Rotativa
</code></pre>

This is based on <code>wkhtmltopdf</code> but it has better css support than iTextSharp has and is very simple to integrate with MVC as you can simply return the view as pdf:

<pre><code>public ActionResult GetPdf()
{
 //...
 return new ViewAsPdf(model);// and you are done!
}
</code></pre>

blocks|key|319612|text|下面是一个完整的示例，使用evo+html+to+pdf+for+.net在C#中将当前MVC视图转换为PDF，并将生成的PDF发送到浏览器进行下载：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|319613|[HttpPost]
public+ActionResult+ConvertCurrentPageToPdf(FormCollection+collection)
{
++++object+model+=+null;
++++ViewDataDictionary+viewData+=+new+ViewDataDictionary(model);

++++//+The+string+writer+where+to+render+the+HTML+code+of+the+view
++++StringWriter+stringWriter+=+new+StringWriter();

++++//+Render+the+Index+view+in+a+HTML+string
++++ViewEngineResult+viewResult+=+ViewEngines.Engines.FindView(ControllerContext,+"Index",+null);
++++ViewContext+viewContext+=+new+ViewContext(
++++++++++++ControllerContext,
++++++++++++viewResult.View,
++++++++++++viewData,
++++++++++++new+TempDataDictionary(),
++++++++++++stringWriter
++++++++++++);
++++viewResult.View.Render(viewContext,+stringWriter);

++++//+Get+the+view+HTML+string
++++string+htmlToConvert+=+stringWriter.ToString();

++++//+Get+the+base+URL
++++String+currentPageUrl+=+this.ControllerContext.HttpContext.Request.Url.AbsoluteUri;
++++String+baseUrl+=+currentPageUrl.Substring(0,+currentPageUrl.Length+-+"Convert_Current_Page/ConvertCurrentPageToPdf".Length);

++++//+Create+a+HTML+to+PDF+converter+object+with+default+settings
++++HtmlToPdfConverter+htmlToPdfConverter+=+new+HtmlToPdfConverter();

++++//+Convert+the+HTML+string+to+a+PDF+document+in+a+memory+buffer
++++byte[]+outPdfBuffer+=+htmlToPdfConverter.ConvertHtml(htmlToConvert,+baseUrl);

++++//+Send+the+PDF+file+to+browser
++++FileResult+fileResult+=+new+FileContentResult(outPdfBuffer,+"application/pdf");
++++fileResult.FileDownloadName+=+"Convert_Current_Page.pdf";

++++return+fileResult;
}|code-block|syntax|javascript|319614|entityMap|0|LINK|mutability|MUTABLE|url|http://www.evopdf.com/^0|D|O|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Here is a complete example for MVC Razor in C# using the <a href="http://www.evopdf.com/" rel="nofollow">evo html to pdf for .net</a> to convert the current MVC view to PDF and send the resulted PDF to browser for download:

<pre><code>[HttpPost]
public ActionResult ConvertCurrentPageToPdf(FormCollection collection)
{
 object model = null;
 ViewDataDictionary viewData = new ViewDataDictionary(model);

 // The string writer where to render the HTML code of the view
 StringWriter stringWriter = new StringWriter();

 // Render the Index view in a HTML string
 ViewEngineResult viewResult = ViewEngines.Engines.FindView(ControllerContext, "Index", null);
 ViewContext viewContext = new ViewContext(
 ControllerContext,
 viewResult.View,
 viewData,
 new TempDataDictionary(),
 stringWriter
 );
 viewResult.View.Render(viewContext, stringWriter);

 // Get the view HTML string
 string htmlToConvert = stringWriter.ToString();

 // Get the base URL
 String currentPageUrl = this.ControllerContext.HttpContext.Request.Url.AbsoluteUri;
 String baseUrl = currentPageUrl.Substring(0, currentPageUrl.Length - "Convert_Current_Page/ConvertCurrentPageToPdf".Length);

 // Create a HTML to PDF converter object with default settings
 HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();

 // Convert the HTML string to a PDF document in a memory buffer
 byte[] outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlToConvert, baseUrl);

 // Send the PDF file to browser
 FileResult fileResult = new FileContentResult(outPdfBuffer, "application/pdf");
 fileResult.FileDownloadName = "Convert_Current_Page.pdf";

 return fileResult;
}
</code></pre>

blocks|key|102470|text|在这里，如果您想编写纯xml，您可以找到一种不同的方法，我发现它更简单、更轻便。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|102471|http://www.codeproject.com/Articles/260470/PDF-reporting-using-ASP-NET-MVC3|offset|length|102472|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|23|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

here you can find a different approach in case you want to write plain xml, i find it much simpler and lighter.

<a href="http://www.codeproject.com/Articles/260470/PDF-reporting-using-ASP-NET-MVC3" rel="nofollow">http://www.codeproject.com/Articles/260470/PDF-reporting-using-ASP-NET-MVC3</a>

blocks|key|319567|text|下面是如何使用MVC完成此操作|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|319568|[Route("ABCDD")]
[HttpGet]
public+void+ABCDD()+{
++++WebClient+wc+=+new+WebClient();
++++//+string+url+=+HttpContext.Current.Request.Url.AbsoluteUri;
++++string+url+=+"http://localhost:3042/Reports/COAListing";
++++string+fileContent+=+wc.DownloadString(url);

++++List<string>+tableContents+=+GetContents(fileContent,+table_pattern);

++++string+HTMLString+=+String.Join("+",+tableContents.ToArray());

++++Document+pdfDoc+=+new+Document(PageSize.A4,+10f,+10f,+10f,+0f);
++++PdfWriter.GetInstance(pdfDoc,+HttpContext.Current.Response.OutputStream);
++++pdfDoc.Open();
++++pdfDoc.Add(new+Paragraph("Welcome+to+dotnetfox"));
++++List<IElement>+htmlarraylist+=+HTMLWorker.ParseToList(new+StringReader(HTMLString),+null);
++++for+(int+k+=+0;+k+<+htmlarraylist.Count;+k%2B%2B)+{
++++++++pdfDoc.Add((IElement)+htmlarraylist[k]);
++++}

++++pdfDoc.Close();
++++HttpContext.Current.Response.ContentType+=+"pdf/application";
++++HttpContext.Current.Response.AddHeader("content-disposition",+"attachment;"+%2B
++++++++++++"filename=sample.pdf");
++++HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
++++HttpContext.Current.Response.Write(pdfDoc);
++++HttpContext.Current.Response.End();
}|code-block|syntax|javascript|319569|entityMap^0|7|3|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

This is how to do it using <code>MVC</code>:

<pre><code>[Route("ABCDD")]
[HttpGet]
public void ABCDD() {
 WebClient wc = new WebClient();
 // string url = HttpContext.Current.Request.Url.AbsoluteUri;
 string url = "http://localhost:3042/Reports/COAListing";
 string fileContent = wc.DownloadString(url);

 List&lt;string&gt; tableContents = GetContents(fileContent, table_pattern);

 string HTMLString = String.Join(" ", tableContents.ToArray());

 Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
 PdfWriter.GetInstance(pdfDoc, HttpContext.Current.Response.OutputStream);
 pdfDoc.Open();
 pdfDoc.Add(new Paragraph("Welcome to dotnetfox"));
 List&lt;IElement&gt; htmlarraylist = HTMLWorker.ParseToList(new StringReader(HTMLString), null);
 for (int k = 0; k &lt; htmlarraylist.Count; k++) {
 pdfDoc.Add((IElement) htmlarraylist[k]);
 }

 pdfDoc.Close();
 HttpContext.Current.Response.ContentType = "pdf/application";
 HttpContext.Current.Response.AddHeader("content-disposition", "attachment;" +
 "filename=sample.pdf");
 HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
 HttpContext.Current.Response.Write(pdfDoc);
 HttpContext.Current.Response.End();
}
</code></pre>

blocks|key|319675|text|如果您使用的是ASP.NET核心，而iTextSharp对您来说并不那么重要，这里是我使用PhantomJS的解决方案：http://nikolay.it/Blog/2018/03/Generate-PDF-file-from-Razor-view-using-ASP-NET-Core-and-PhantomJS/37|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|319676|从Razor视图获取HTML字符串|319677|这一步非常简单。ASP.NET核心中有一个名为IRazorViewEngine的服务，可以注入该服务，然后使用它来获取视图。在为视图提供默认的ViewDataDictionary和ActionContext之后，我们可以请求将视图呈现为StringWriter，它可以很容易地转换为字符串。下面是从给定的Razor视图文件中获取字符串的现成代码：|style|CODE|319678|public+interface+IViewRenderService
{
++++Task<string>+RenderToStringAsync(string+viewName,+object+model);
}

public+class+ViewRenderService+:+IViewRenderService
{
++++private+readonly+IRazorViewEngine+razorViewEngine;
++++private+readonly+ITempDataProvider+tempDataProvider;
++++private+readonly+IServiceProvider+serviceProvider;

++++public+ViewRenderService(
++++++++IRazorViewEngine+razorViewEngine,
++++++++ITempDataProvider+tempDataProvider,
++++++++IServiceProvider+serviceProvider)
++++{
++++++++this.razorViewEngine+=+razorViewEngine;
++++++++this.tempDataProvider+=+tempDataProvider;
++++++++this.serviceProvider+=+serviceProvider;
++++}

++++public+async+Task<string>+RenderToStringAsync(string+viewName,+object+model)
++++{
++++++++var+httpContext+=+new+DefaultHttpContext+{+RequestServices+=+this.serviceProvider+};
++++++++var+actionContext+=+new+ActionContext(httpContext,+new+RouteData(),+new+ActionDescriptor());

++++++++using+(var+sw+=+new+StringWriter())
++++++++{
++++++++++++var+viewResult+=+this.razorViewEngine.GetView(null,+viewName,+false);

++++++++++++if+(viewResult.View+==+null)
++++++++++++{
++++++++++++++++throw+new+ArgumentNullException($"{viewName}+does+not+match+any+available+view");
++++++++++++}

++++++++++++var+viewDictionary+=
++++++++++++++++new+ViewDataDictionary(
++++++++++++++++++++new+EmptyModelMetadataProvider(),
++++++++++++++++++++new+ModelStateDictionary())+{+Model+=+model+};

++++++++++++var+viewContext+=+new+ViewContext(
++++++++++++++++actionContext,
++++++++++++++++viewResult.View,
++++++++++++++++viewDictionary,
++++++++++++++++new+TempDataDictionary(actionContext.HttpContext,+this.tempDataProvider),
++++++++++++++++sw,
++++++++++++++++new+HtmlHelperOptions());

++++++++++++await+viewResult.View.RenderAsync(viewContext);
++++++++++++return+sw.ToString();
++++++++}
++++}
}|code-block|syntax|javascript|319679|这里需要考虑的一个重要问题是:如果使用视图编译(将视图预编译为YourProject.Web.PrecompiledViews.dll)，那么使用GetView方法而不是FindView获取视图是很重要的。更多信息here。|319680|使用PhantomJS从HTML生成PDF文件|319681|对于这个任务，我们将使用一个无头浏览器，它将呈现HTML+(其中包含所有CSS和JS+)。有很多这样的工具，但我将使用PhantomJS+(带有JavaScript+WebKit的无头API脚本)。PhantomJS可以非常快地将渲染的页面保存为小尺寸的PDF。要使PDF导出正常工作，我们需要一个.js文件，该文件将使用PhantomJS应用程序接口来告诉工具我们想要导出该文件：|319682|"use+strict";
var+page+=+require('webpage').create(),
++++system+=+require('system'),
++++address,
++++output;

console.log('Usage:+rasterize.js+[URL]+[filename]+[paperformat]');
address+=+system.args[1];
output+=+system.args[2];
page.viewportSize+=+{+width:+600,+height:+600+};
page.paperSize+=+{+format:+system.args[3],+orientation:+'portrait',+margin:+'0.5cm'+};

page.open(address,+function+(status)+{
++++if+(status+!==+'success')+{
++++++++console.log('Unable+to+load+the+address!');
++++++++phantom.exit(1);
++++}+else+{
++++++++window.setTimeout(function+()+{
++++++++++++page.render(output);
++++++++++++phantom.exit();
++++++++},+200);
++++}
});|319683|下一步是运行phantomjs.exe进程并传递rasterize.js文件，以及HTML文件的路径和结果的输出文件名。这是在HtmlToPdfConverter.cs中完成的|319684|public+interface+IHtmlToPdfConverter
{
++++byte[]+Convert(string+htmlCode);
}

public+class+HtmlToPdfConverter+:+IHtmlToPdfConverter
{
++++public+byte[]+Convert(string+htmlCode)
++++{
++++++++var+inputFileName+=+"input.html";
++++++++var+outputFileName+=+"output.pdf";
++++++++File.WriteAllText(inputFileName,+htmlCode);
++++++++var+startInfo+=+new+ProcessStartInfo("phantomjs.exe")
++++++++++++++++++++++++++++{
++++++++++++++++++++++++++++++++WorkingDirectory+=+Environment.CurrentDirectory,
++++++++++++++++++++++++++++++++Arguments+=+string.Format(
++++++++++++++++++++++++++++++++++++"rasterize.js+\"{0}\"+{1}+\"A4\"",
++++++++++++++++++++++++++++++++++++inputFileName,
++++++++++++++++++++++++++++++++++++outputFileName),
++++++++++++++++++++++++++++++++UseShellExecute+=+true,
++++++++++++++++++++++++++++};

++++++++var+process+=+new+Process+{+StartInfo+=+startInfo+};
++++++++process.Start();

++++++++process.WaitForExit();

++++++++var+bytes+=+File.ReadAllBytes(outputFileName);

++++++++File.Delete(inputFileName);
++++++++File.Delete(outputFileName);

++++++++return+bytes;
++++}
}|319685|如果你打算在Azure中部署你的应用程序，将UseShellExecute设置为true是很重要的。|319686|一起使用代码|319687|因为我们现在已经实现了IViewRenderService和IHtmlToPdfConverter，所以我们可以通过首先在Startup.cs文件中注册它们来开始使用它们，ConfigureServices方法应该位于这个文件中(services.AddScoped<IViewRenderService,+ViewRenderService>()和services.AddScoped<IHtmlToPdfConverter,+HtmlToPdfConverter>())。现在让我们看一下打包在一起的代码：|319688|private+readonly+IViewRenderService+viewRenderService;
private+readonly+IHtmlToPdfConverter+htmlToPdfConverter;

public+DashboardController(
++++IViewRenderService+viewRenderService,
++++IHtmlToPdfConverter+htmlToPdfConverter)
{
++++this.viewRenderService+=+viewRenderService;
++++this.htmlToPdfConverter+=+htmlToPdfConverter;
}

[HttpGet]
public+async+Task<IActionResult>+GetPdf(SomeInputModel+input)
{
++++var+model+=+this.GetViewModel(input);
++++var+htmlData+=+await+this.viewRenderService.RenderToStringAsync("~/Views/Dashboard/GetPdf.cshtml",+model);
++++var+fileContents+=+this.htmlToPdfConverter.Convert(htmlData);
++++return+this.File(fileContents,+"application/pdf");
}|319689|entityMap|0|LINK|mutability|MUTABLE|url|http://nikolay.it/Blog/2018/03/Generate-PDF-file-from-Razor-view-using-ASP-NET-Core-and-PhantomJS/37|1|https://github.com/aspnet/MvcPrecompilation/issues/191#issuecomment-324435628|2|http://phantomjs.org/^0|1O|2S|0|0|0|N|G|1Z|I|2I|D|3A|C|0|0|V|10|21|7|2D|8|2Z|4|1|0|0|45|3|1N|9|2|0|0|6|D|O|C|1R|L|0|0|M|F|14|4|0|0|B|I|U|J|1P|A|37|1N|4V|1P|0|0^^$0|@$1|2|3|4|5|6|7|1K|8|@]|9|@$A|1L|B|1M|1|1N]]|C|$]]|$1|D|3|E|5|6|7|1O|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|1P|8|@$A|1Q|B|1R|H|I]|$A|1S|B|1T|H|I]|$A|1U|B|1V|H|I]|$A|1W|B|1X|H|I]]|9|@]|C|$]]|$1|J|3|K|5|L|7|1Y|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1Z|8|@$A|20|B|21|H|I]|$A|22|B|23|H|I]|$A|24|B|25|H|I]]|9|@$A|26|B|27|1|28]]|C|$]]|$1|Q|3|R|5|6|7|29|8|@]|9|@]|C|$]]|$1|S|3|T|5|6|7|2A|8|@$A|2B|B|2C|H|I]]|9|@$A|2D|B|2E|1|2F]]|C|$]]|$1|U|3|V|5|L|7|2G|8|@]|9|@]|C|$M|N]]|$1|W|3|X|5|6|7|2H|8|@$A|2I|B|2J|H|I]|$A|2K|B|2L|H|I]|$A|2M|B|2N|H|I]]|9|@]|C|$]]|$1|Y|3|Z|5|L|7|2O|8|@]|9|@]|C|$M|N]]|$1|10|3|11|5|6|7|2P|8|@$A|2Q|B|2R|H|I]|$A|2S|B|2T|H|I]]|9|@]|C|$]]|$1|12|3|13|5|6|7|2U|8|@]|9|@]|C|$]]|$1|14|3|15|5|6|7|2V|8|@$A|2W|B|2X|H|I]|$A|2Y|B|2Z|H|I]|$A|30|B|31|H|I]|$A|32|B|33|H|I]|$A|34|B|35|H|I]]|9|@]|C|$]]|$1|16|3|17|5|L|7|36|8|@]|9|@]|C|$M|N]]|$1|18|3|-4|5|6|7|37|8|@]|9|@]|C|$]]]|19|$1A|$5|1B|1C|1D|C|$1E|1F]]|1G|$5|1B|1C|1D|C|$1E|1H]]|1I|$5|1B|1C|1D|C|$1E|1J]]]]

In case you are using ASP.NET Core and iTextSharp is not that important to you here is my solution using PhantomJS: <a href="http://nikolay.it/Blog/2018/03/Generate-PDF-file-from-Razor-view-using-ASP-NET-Core-and-PhantomJS/37" rel="nofollow noreferrer">http://nikolay.it/Blog/2018/03/Generate-PDF-file-from-Razor-view-using-ASP-NET-Core-and-PhantomJS/37</a>

<h2>Get HTML string from a Razor view</h2>

This step is pretty straight-forward. There is a service called <code>IRazorViewEngine</code> in ASP.NET Core which can be injected and then used to get the view. After providing the view with default <code>ViewDataDictionary</code> and <code>ActionContext</code> we can request the view to be rendered into <code>StringWriter</code> which can be easily converted to string. Here is ready-to-use code for getting a string from given Razor view file:

<pre><code>public interface IViewRenderService
{
 Task&lt;string&gt; RenderToStringAsync(string viewName, object model);
}

public class ViewRenderService : IViewRenderService
{
 private readonly IRazorViewEngine razorViewEngine;
 private readonly ITempDataProvider tempDataProvider;
 private readonly IServiceProvider serviceProvider;

 public ViewRenderService(
 IRazorViewEngine razorViewEngine,
 ITempDataProvider tempDataProvider,
 IServiceProvider serviceProvider)
 {
 this.razorViewEngine = razorViewEngine;
 this.tempDataProvider = tempDataProvider;
 this.serviceProvider = serviceProvider;
 }

 public async Task&lt;string&gt; RenderToStringAsync(string viewName, object model)
 {
 var httpContext = new DefaultHttpContext { RequestServices = this.serviceProvider };
 var actionContext = new ActionContext(httpContext, new RouteData(), new ActionDescriptor());

 using (var sw = new StringWriter())
 {
 var viewResult = this.razorViewEngine.GetView(null, viewName, false);

 if (viewResult.View == null)
 {
 throw new ArgumentNullException($"{viewName} does not match any available view");
 }

 var viewDictionary =
 new ViewDataDictionary(
 new EmptyModelMetadataProvider(),
 new ModelStateDictionary()) { Model = model };

 var viewContext = new ViewContext(
 actionContext,
 viewResult.View,
 viewDictionary,
 new TempDataDictionary(actionContext.HttpContext, this.tempDataProvider),
 sw,
 new HtmlHelperOptions());

 await viewResult.View.RenderAsync(viewContext);
 return sw.ToString();
 }
 }
}
</code></pre>

One important think here: if you use view compilation (pre-compiling views to <code>YourProject.Web.PrecompiledViews.dll</code>) then it is important to get the view using the <code>GetView</code> method instead of <code>FindView</code>. More information <a href="https://github.com/aspnet/MvcPrecompilation/issues/191#issuecomment-324435628" rel="nofollow noreferrer">here</a>.

<h2>Generate the PDF file from HTML using PhantomJS</h2>

For this task we are going to use a headless browser which will render the HTML (with all CSS and JS included in it). There are many such tools but I will use <a href="http://phantomjs.org/" rel="nofollow noreferrer">PhantomJS</a> (headless WebKit scriptable with a JavaScript API). PhantomJS can save the rendered page to small-sized PDF pretty fast. For the PDF export to work we are going to need a <code>.js</code> file which will use the PhantomJS API to tell the tool that we want to export the file:

<pre><code>"use strict";
var page = require('webpage').create(),
 system = require('system'),
 address,
 output;

console.log('Usage: rasterize.js [URL] [filename] [paperformat]');
address = system.args[1];
output = system.args[2];
page.viewportSize = { width: 600, height: 600 };
page.paperSize = { format: system.args[3], orientation: 'portrait', margin: '0.5cm' };

page.open(address, function (status) {
 if (status !== 'success') {
 console.log('Unable to load the address!');
 phantom.exit(1);
 } else {
 window.setTimeout(function () {
 page.render(output);
 phantom.exit();
 }, 200);
 }
});
</code></pre>

The next thing is to run the <code>phantomjs.exe</code> process and pass the <code>rasterize.js</code> file along with paths for the HTML file and the output file name for the PDF result. This is done in <code>HtmlToPdfConverter.cs</code>:

<pre><code>public interface IHtmlToPdfConverter
{
 byte[] Convert(string htmlCode);
}

public class HtmlToPdfConverter : IHtmlToPdfConverter
{
 public byte[] Convert(string htmlCode)
 {
 var inputFileName = "input.html";
 var outputFileName = "output.pdf";
 File.WriteAllText(inputFileName, htmlCode);
 var startInfo = new ProcessStartInfo("phantomjs.exe")
 {
 WorkingDirectory = Environment.CurrentDirectory,
 Arguments = string.Format(
 "rasterize.js \"{0}\" {1} \"A4\"",
 inputFileName,
 outputFileName),
 UseShellExecute = true,
 };

 var process = new Process { StartInfo = startInfo };
 process.Start();

 process.WaitForExit();

 var bytes = File.ReadAllBytes(outputFileName);

 File.Delete(inputFileName);
 File.Delete(outputFileName);

 return bytes;
 }
}
</code></pre>

If you are going to deploy your application in Azure it is important to have <code>UseShellExecute</code> set to <code>true</code>.

<h2>Use the code together</h2>

Since we now have implemented both <code>IViewRenderService</code> and <code>IHtmlToPdfConverter</code> we can start using them by first register them in the <code>Startup.cs</code> file where your ConfigureServices method should be located (<code>services.AddScoped&lt;IViewRenderService, ViewRenderService&gt;()</code> and <code>services.AddScoped&lt;IHtmlToPdfConverter, HtmlToPdfConverter&gt;()</code>). Now lets see the code wrapped up together:

<pre><code>private readonly IViewRenderService viewRenderService;
private readonly IHtmlToPdfConverter htmlToPdfConverter;

public DashboardController(
 IViewRenderService viewRenderService,
 IHtmlToPdfConverter htmlToPdfConverter)
{
 this.viewRenderService = viewRenderService;
 this.htmlToPdfConverter = htmlToPdfConverter;
}

[HttpGet]
public async Task&lt;IActionResult&gt; GetPdf(SomeInputModel input)
{
 var model = this.GetViewModel(input);
 var htmlData = await this.viewRenderService.RenderToStringAsync("~/Views/Dashboard/GetPdf.cshtml", model);
 var fileContents = this.htmlToPdfConverter.Convert(htmlData);
 return this.File(fileContents, "application/pdf");
}
</code></pre>

I am trying to convert HTML to PDF with <code>iTextSharp</code> in MVC Razor, but everything I have tried has not worked. Does anyone know how to accomplish this?

Convert HTML to PDF in MVC with iTextSharp in MVC Razor

我试图用MVC Razor中的iTextSharp将HTML转换为PDF，但我所尝试的一切都不起作用。有谁知道如何做到这一点吗？

问用MVC Razor中的iTextSharp在MVC中转换HTML到PDF
EN

回答 8

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