Winnovative HTML to PDF Converter 不使用 IE 作为渲染引擎。它与 WebKit 渲染兼容,不依赖于 IE 或任何其他第三方工具。
您可以转换当前的 HTML 页面,覆盖 ASP.NET 页面的 Render() 方法,并捕获页面呈现的 HTML 代码。您可以在Convert the Current HTML Page to PDF Demo中找到带有 C# 源代码的完整示例。
以下是此方法的相关源代码:
// Controls if the current HTML page will be rendered to PDF or as a normal page
bool convertToPdf = false;
protected void convertToPdfButton_Click(object sender, EventArgs e)
{
// The current ASP.NET page will be rendered to PDF when its Render method will be called by framework
convertToPdf = true;
}
protected override void Render(HtmlTextWriter writer)
{
if (convertToPdf)
{
// Get the current page HTML string by rendering into a TextWriter object
TextWriter outTextWriter = new StringWriter();
HtmlTextWriter outHtmlTextWriter = new HtmlTextWriter(outTextWriter);
base.Render(outHtmlTextWriter);
// Obtain the current page HTML string
string currentPageHtmlString = outTextWriter.ToString();
// Create a HTML to PDF converter object with default settings
HtmlToPdfConverter htmlToPdfConverter = new HtmlToPdfConverter();
// Set license key received after purchase to use the converter in licensed mode
// Leave it not set to use the converter in demo mode
htmlToPdfConverter.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=";
// Use the current page URL as base URL
string baseUrl = HttpContext.Current.Request.Url.AbsoluteUri;
// Convert the current page HTML string a PDF document in a memory buffer
byte[] outPdfBuffer = htmlToPdfConverter.ConvertHtml(currentPageHtmlString, baseUrl);
// Send the PDF as response to browser
// Set response content type
Response.AddHeader("Content-Type", "application/pdf");
// Instruct the browser to open the PDF file as an attachment or inline
Response.AddHeader("Content-Disposition", String.Format("attachment; filename=Convert_Current_Page.pdf; size={0}", outPdfBuffer.Length.ToString()));
// Write the PDF document buffer to HTTP response
Response.BinaryWrite(outPdfBuffer);
// End the HTTP response and stop the current page processing
Response.End();
}
else
{
base.Render(writer);
}
}