我有一些代码可以使用iTextSharp将HTML转换为PDF，但是，当我查看PDF时，图像的字体大小和大小与HTML中指定的不同。
我的代码如下 - 任何帮助将不胜感激：
Public Function RenderPdf() As MemoryStream
Dim file As New MemoryStream()
Dim document As New iTextSharp.text.Document(Me.PageSize)
Dim writer As PdfWriter = PdfWriter.GetInstance(document, file)
document.Open()
Dim tagProcessors As DefaultTagProcessorFactory = Tags.GetHtmlTagProcessorFactory()
tagProcessors.RemoveProcessor(HTML.Tag.IMG) 'remove the default processor
tagProcessors.AddProcessor(HTML.Tag.IMG, New CustomImageTagProcessor()) 'use our new processor
Using document
'render each page that has been added
For Each page As HtmlPdfPage In Me._Pages
document.NewPage()
'generate this page of text
Dim output As New MemoryStream()
Dim html As New StreamWriter(output, Encoding.UTF8)
Dim sr As New StringReader(page._Html.ToString())
Dim cssFiles As New CssFilesImpl()
cssFiles.Add(XMLWorkerHelper.GetInstance().GetDefaultCSS())
Dim cssResolver As New StyleAttrCSSResolver(cssFiles)
Dim charset = Encoding.UTF8
Dim hpc As New HtmlPipelineContext(New CssAppliersImpl(New XMLWorkerFontProvider()))
hpc.SetAcceptUnknown(True).AutoBookmark(True).SetTagFactory(tagProcessors) 'inject the tagProcessors
Dim htmlPipeline As New pipeline.html.HtmlPipeline(hpc, New PdfWriterPipeline(document, writer))
Dim pipeline As New CssResolverPipeline(cssResolver, htmlPipeline)
Dim worker As New XMLWorker(pipeline, True)
Dim xmlParser As New iTextSharp.tool.xml.parser.XMLParser(True, worker, charset)
xmlParser.Parse(sr)
Next
'return the rendered PDF
Return file
End Using
End Function
Public Class CustomImageTagProcessor
Inherits iTextSharp.tool.xml.html.Image
Public Overrides Function [End](ctx As IWorkerContext, tag As Tag, currentContent As IList(Of IElement)) As IList(Of IElement)
Dim attributes As IDictionary(Of String, String) = tag.Attributes
Dim src As String
If Not attributes.TryGetValue(HTML.Attribute.SRC, src) Then
Return New List(Of IElement)(1)
End If
If String.IsNullOrEmpty(src) Then
Return New List(Of IElement)(1)
End If
If src.StartsWith("data:image/", StringComparison.InvariantCultureIgnoreCase) Then
' data:[<MIME-type>][;charset=<encoding>][;base64],<data>
Dim base64Data = src.Substring(src.IndexOf(",") + 1)
Dim imagedata = Convert.FromBase64String(base64Data)
Dim image = iTextSharp.text.Image.GetInstance(imagedata)
Dim list = New List(Of IElement)()
Dim htmlPipelineContext = GetHtmlPipelineContext(ctx)
list.Add(GetCssAppliers().Apply(New Chunk(DirectCast(GetCssAppliers().Apply(image, tag, htmlPipelineContext), iTextSharp.text.Image), 0, 0, True), tag, htmlPipelineContext))
Return list
Else
Return MyBase.[End](ctx, tag, currentContent)
End If
End Function
End Class
示例HTML是：
<html>
<head>
<style id="mceDefaultStyles" type="text/css">
//<![CDATA[
.mce-content-body div.mce-resizehandle {position: absolute;border: 1px solid black;background: #FFF;width: 5px;height: 5px;z-index: 10000}.mce-content-body .mce-resizehandle:hover {background: #000}.mce-content-body img[data-mce-selected], hr[data-mce-selected] {outline: 1px solid black;resize: none}.mce-content-body .mce-clonedresizable {position: absolute;opacity: .5;filter: alpha(opacity=50);z-index: 10000}
img:-moz-broken {-moz-force-broken-image-icon:1;min-width:24px;min-height:24px}
//]]>//
</style>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link href="http://localhost:60699/Scripts/tinymce/skins/lightgray/content.min.css"
rel="stylesheet" type="text/css" />
</head>
<body>
<style id="mceDefaultStyles" type="text/css">
//<![CDATA[
.mce-content-body div.mce-resizehandle {position: absolute;border: 1px solid black;background: #FFF;width: 5px;height: 5px;z-index: 10000}.mce-content-body .mce-resizehandle:hover {background: #000}.mce-content-body img[data-mce-selected], hr[data-mce-selected] {outline: 1px solid black;resize: none}.mce-content-body .mce-clonedresizable {position: absolute;outline: 1px dashed black;opacity: .5;filter: alpha(opacity=50);z-index: 10000}
//]]>//
</style>
<link href="http://localhost:59372/Call_Scripter/Scripts/tinymce/skins/lightgray/content.min.css"
rel="stylesheet" type="text/css" data-mce-href="http://localhost:59372/Call_Scripter/Scripts/tinymce/skins/lightgray/content.min.css" />
<p>
<br />
</p>
<table width="1000" align="center" class="" cellspacing="0" cellpadding="0">
<tbody>
<tr>
<td valign="top" style="width: 560px; padding-left: 80px;" data-mce-style="width: 560px; padding-left: 80px;">
<strong><span style="font-size: 18px;" data-mce-style="font-size: 18px;">Company Name</span><br />
ABN: 65 999 999 999<br />
PO Box 999<br />
Suburb, State, Postcode Australia<br />
Phone: 02 9999 9999 Fax: 02 9999 9999<br />
Email: anemailaddress@blahblah.com.au<br />
Web: www.blahblah.com.au </strong>
</td>
<td valign="top" rowspan="2">
<strong><span style="font-size: 18px;" data-mce-style="font-size: 18px;">Tax Invoice</span>
</strong>
<table class="" data-mce-selected="1">
<tbody>
<tr>
<td width="170" style="font-weight: bold;" data-mce-style="font-weight: bold;">
Invoice Number:
</td>
<td style="font-weight: bold;" data-mce-style="font-weight: bold;">
</td>
</tr>
<tr>
<td>
</td>
<td>
</td>
</tr>
<tr>
<td>
Sales Order:
</td>
<td>
</td>
</tr>
<tr>
<td>
Invoice Date:
</td>
<td>
</td>
</tr>
<tr>
<td>
ABN:
</td>
<td>
65 090 839 197
</td>
</tr>
<tr>
<td>
Your Reference:
</td>
<td>
</td>
</tr>
<tr>
<td>
<strong>Page 1 of 1</strong>
</td>
<td>
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td valign="bottom" style="padding-left: 160px;" data-mce-style="padding-left: 160px;">
<strong></strong>Australia
</td>
</tr>
<tr>
<td style="padding-right: 25px;" colspan="2" data-mce-style="padding-right: 25px;">
<hr style="background: rgb(0, 0, 0); width: 100%; height: 2px; color: rgb(0, 0, 0);
border-top-color: rgb(0, 0, 0); border-top-width: 1px; border-top-style: solid;
display: block;" data-mce-style="display: block; width: 100%; height: 2px; background: transparent; background-color: #000; border-top: solid 1px #000; color: #000;" />
</td>
</tr>
<tr>
<td align="right" valign="top" style="width: 560px; height: 900px; padding-left: 80px;"
colspan="2" data-mce-style="width: 560px; padding-left: 80px; height: 900px;">
<table class="" style="width: 920px;" data-mce-selected="1" data-mce-style="width: 920px;">
<tbody>
<tr>
<td>
<strong>Product</strong>
</td>
<td>
<strong>Item Description</strong>
</td>
<td align="center">
<strong>Qty</strong>
</td>
<td align="right">
<strong>Unit Price (Ex GST)</strong>
</td>
<td style="padding-left: 10px;" data-mce-style="padding-left: 10px;">
<strong>Unit</strong>
</td>
<td align="right">
<strong>Discount</strong>
</td>
<td align="right">
<strong>Net Amount</strong>
</td>
<td align="right">
<strong>GST</strong>
</td>
<td align="right">
<strong>Total</strong>
</td>
</tr>
<tr>
<td>
</td>
<td style="width: 220px;" data-mce-style="width: 220px;">
</td>
<td align="center">
1
</td>
<td align="right">
</td>
<td>
</td>
<td>
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td align="right" style="font-weight: bold;" colspan="2" data-mce-style="font-weight: bold;">
<table align="right" class="" style="width: 450px;" data-mce-selected="1" data-mce-style="width: 450px;">
<tbody>
<tr>
<td>
Total Page 1
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
</tr>
<tr>
<td>
Grand Total AUD
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
</tr>
<tr>
<td>
</td>
<td align="center" style="text-align: left;" colspan="2" data-mce-style="text-align: left;">
Balance Owing
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
$0.00
</td>
</tr>
<tr>
<td>
</td>
<td align="center" style="text-align: left;" colspan="2" data-mce-style="text-align: left;">
PAID IN FULL
</td>
<td align="right" style="width: 100px;" data-mce-style="width: 100px;">
</td>
</tr>
</tbody>
</table>
</td>
</tr>
<tr>
<td style="padding-right: 25px;" colspan="2" data-mce-style="padding-right: 25px;">
<hr style="background: rgb(0, 0, 0); width: 100%; height: 2px; color: rgb(0, 0, 0);
border-top-color: rgb(0, 0, 0); border-top-width: 1px; border-top-style: solid;
display: block;" data-mce-style="display: block; width: 100%; height: 2px; background: transparent; background-color: #000; border-top: solid 1px #000; color: #000;" />
</td>
</tr>
</tbody>
</table>
<p>
</p>
</body>
</html>
答案 0 :(得分：0)
我最终放弃了iTextSharp进行HTML到PDF的转换，相反，我选择了这个解决方案https://github.com/gmanny/Pechkin - 这意味着我可以使用1行代码生成PDF并且PDF完美无缺！