1.首先要找到wnvhtmlconvert.dll这个文件，并引入项目中。

2.Server.Execute("pos.aspx?id=" + ids); 执行相应的aspx网页

3.pos.aspx网页中有这样的一个方法，此方法用来生成html页面

protected override void Render(HtmlTextWriter writer)

{

string htmlname = "POSDemo";

string fileName = string.Empty;

string content = string.Empty;

System.IO.StringWriter stringWriter = new System.IO.StringWriter();

HtmlTextWriter htmlWriter = new HtmlTextWriter(stringWriter);

System.IO.StreamWriter sw = null;

try

{

// 将当前页面的内容呈现到临时的 HtmlTextWriter 对象中

base.Render(htmlWriter);

htmlWriter.Close();

// 得到当前页面的全部内容

content = stringWriter.ToString();

fileName = htmlname + ".html";

//sw = new StreamWriter(Server.MapPath("htm/") + fileName, false, code);

//sw.Write(str);

//sw.Flush();

//System.IO.StringWriter creaObj = new System.IO.StringWriter(Server.MapPath("html/") + fileName, false, content);

string path = HttpContext.Current.Server.MapPath("../Upload/");

System.Text.Encoding code = System.Text.Encoding.GetEncoding("utf-8");

sw = new System.IO.StreamWriter(path + fileName, false, code);

//sw = new System.IO.StreamWriter(fileName, false, code);

sw.Write(content);

sw.Flush();

string website = "http://" + HttpContext.Current.Request.Url.Authority;

Response.Write(content);

}

catch { }

finally

{

sw.Dispose();

stringWriter.Dispose();

htmlWriter.Close();

htmlWriter.Dispose();

}

}

 

4.运用下面的类来生成pdf字节

public class MyPDFGenerator

{

public static byte[] Create(string sUrl)

{

try

{

PdfConverter pdfConverter = new PdfConverter();

// set the license key - required

//pdfConverter.LicenseKey = "P38cBx6AWW7b9c81TjEGxnrazP+J7rOjs+9omJ3TUycauK+cLWdrITM5T59hdW5r";//test key, add by tieli

pdfConverter.LicenseKey = "oYqQgZCBlpeBlY+RgZKQj5CTj5iYmJg=";

// set the converter options - optional

pdfConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4;

pdfConverter.PdfDocumentOptions.PdfCompressionLevel = PdfCompressionLevel.NoCompression;

pdfConverter.PdfDocumentOptions.PdfPageOrientation = PDFPageOrientation.Portrait;

pdfConverter.PdfDocumentOptions.ShowHeader = false;

pdfConverter.PdfDocumentOptions.ShowFooter = false;

pdfConverter.PdfDocumentOptions.AutoSizePdfPage = true;

// set to generate selectable pdf or a pdf with embedded image - optional

pdfConverter.PdfDocumentOptions.GenerateSelectablePdf = true;

// set the embedded fonts option - optional, by default is false

pdfConverter.PdfDocumentOptions.EmbedFonts = false;

// enable the live HTTP links option - optional, by default is true

pdfConverter.PdfDocumentOptions.LiveUrlsEnabled = true;

// enable the support for right to left languages , by default false

pdfConverter.RightToLeftEnabled = false;

pdfConverter.PdfDocumentInfo.AuthorName = "Telamon Global, Inc.";

// add HTML header

//if (cbAddHeader.Checked)

// AddHeader(pdfConverter);

add HTML footer

//if (cbAddFooter.Checked)

// AddFooter(pdfConverter);

// Performs the conversion and get the pdf document bytes that you can further

// save to a file or send as a browser response

byte[] pdfBytes = pdfConverter.GetPdfFromUrlBytes(sUrl);

//byte[] pdfBytes = pdfConverter.GetPdfBytesFromHtmlFile(@"D:\Peter\Projects\TGSAPSystem\Code\HKOMS\Web Site\Quotes\aaaa.html");

//byte[] pdfBytes = pdfConverter.GetPdfBytesFromHtmlString(html);

// get the html string for the report

//StringWriter htmlStringWriter = new StringWriter();

//Server.Execute("InvoiceTemplate.aspx", htmlStringWriter);

//string htmlCodeToConvert = htmlStringWriter.GetStringBuilder().ToString();

//htmlStringWriter.Close();

//string baseUrl = GetAbsoluteUrl(url);

//SplendidError.SystemError(new StackTrace(true).GetFrame(0), baseUrl);

// get the pdf bytes from html string

//byte[] pdfBytes = pdfConverter.GetPdfBytesFromHtmlString(url);

return pdfBytes;

}

catch

{

return null;

}

}

}

 

5.调用方法

byte[] bytes = MyPDFGenerator.Create(Server.MapPath("../Upload/POSDemo.html"));

 

6.最后导出pdf

 

System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;

response.Clear();

response.AddHeader("Content-Type", "binary/octet-stream");

response.AddHeader("Content-Disposition",

"attachment; filename=" + fileName + ".pdf; size=" + bytes.Length.ToString());

response.Flush();

response.BinaryWrite(bytes);

response.Flush();

response.End();