我试图按照这个例子用图像Example PDF with an Image创建PDF
我正在使用VB.NET(ASP.NET 3.5)中的VS2013进行开发。
我疯了,我不明白两件事:
我在项目中嵌入了一个图像,清单中包含了
...
}
.mresource public Test1.phone.jpg
{
// Offset: 0x00000000 Length: 0x00003E0D
}
.mresource public Test1.Resources.resources
{
// Offset: 0x00003E11 Length: 0x0000406B
}
我正在逐步调试,但从未执行覆盖函数中的代码。
这是生成PDF的功能
Public Function CreateFromHtml(ByVal html As String) As Stream
Dim stream = New MemoryStream()
Using doc = New Document(PageSize.A4)
Using ms = New MemoryStream()
Using writer = PdfWriter.GetInstance(doc, ms)
writer.CloseStream = False
doc.Open()
Dim tagProcessors = CType(Tags.GetHtmlTagProcessorFactory(), DefaultTagProcessorFactory)
tagProcessors.RemoveProcessor(iTextSharp.tool.xml.html.HTML.Tag.IMG)
tagProcessors.AddProcessor(iTextSharp.tool.xml.html.HTML.Tag.IMG, New CustomImageTagProcessor())
Dim cssFiles = New CssFilesImpl()
cssFiles.Add(XMLWorkerHelper.GetInstance().GetDefaultCSS())
Dim cssResolver = New StyleAttrCSSResolver(cssFiles)
Dim charset = Encoding.UTF8
Dim context = New HtmlPipelineContext(New CssAppliersImpl(New XMLWorkerFontProvider()))
context.SetAcceptUnknown(True).AutoBookmark(True).SetTagFactory(tagProcessors)
Dim htmlPipeline = New HtmlPipeline(context, New PdfWriterPipeline(doc, writer))
Dim cssPipeline = New CssResolverPipeline(cssResolver, htmlPipeline)
Dim worker = New XMLWorker(cssPipeline, True)
Dim xmlParser = New XMLParser(True, worker, charset)
Using sr = New StringReader(html)
xmlParser.Parse(sr)
doc.Close()
ms.Position = 0
ms.CopyTo(stream)
stream.Position = 0
End Using
End Using
End Using
End Using
Return stream
End Function
这是CustomImageTagProcessor类
Imports iTextSharp.tool.xml
Imports System.Reflection
Imports iTextSharp.text
Public Class CustomImageTagProcessor
Inherits iTextSharp.tool.xml.html.Image
Public Overrides Function [End](ByVal ctx As IWorkerContext, ByVal tag As Tag, ByVal currentContent As IList(Of IElement)) As IList(Of IElement)
Dim src = String.Empty
If Not tag.Attributes.TryGetValue(iTextSharp.tool.xml.html.HTML.Attribute.SRC, src) Then Return New List(Of IElement)(1)
If String.IsNullOrEmpty(src) Then Return New List(Of IElement)(1)
If src.StartsWith("data:imagestream/", StringComparison.InvariantCultureIgnoreCase) Then
Dim name = src.Substring(src.IndexOf("/", StringComparison.InvariantCultureIgnoreCase) + 1)
Using stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(name)
Return CreateElementList(ctx, tag, Image.GetInstance(stream))
End Using
End If
Return MyBase.[End](ctx, tag, currentContent)
End Function
Protected Function CreateElementList(ByVal ctx As IWorkerContext, ByVal tag As Tag, ByVal image As Image) As IList(Of IElement)
Dim htmlPipelineContext = GetHtmlPipelineContext(ctx)
Dim result = New List(Of IElement)()
Dim element = GetCssAppliers().Apply(New Chunk(CType(GetCssAppliers().Apply(image, tag, htmlPipelineContext), Image), 0, 0, True), tag, htmlPipelineContext)
result.Add(element)
Return result
End Function
End Class
非常感谢任何帮助。我希望你们好。
这个问题很遗憾
</img>
标签
自闭标签无效。
当我把标签也代码内部覆盖功能已经执行。
非常感谢。