使用图像处理程序将相对路径转换为绝对路径。
protected byte[] ConvertHTMLToPDF(string HTMLCode)
{
if (Request.Url == null)
throw new Exception();
var doc = new Document(PageSize.A4);
doc.Open();
var interfaceProps = new Hashtable();
var ih = new ImageHander {BaseUri = Request.Url.ToString()};
interfaceProps.Add("img_provider", ih);
foreach (IElement element in HTMLWorker.ParseToList(new StringReader(HTMLCode), null, interfaceProps))
{
doc.Add(element);
}
var _xmlr = new XmlTextReader(new StringReader(HTMLCode));
HtmlParser.Parse(doc, _xmlr);
var stream = new MemoryStream();
PdfWriter.GetInstance(doc, stream);
doc.Close();
return stream.ToArray();
}
班级:
public class ImageHander : IImageProvider
{
public string BaseUri;
public Image GetImage(string src, Hashtable h, ChainedProperties cprops, IDocListener doc)
{
string imgPath;
if (src.ToLower().Contains("http://") == false)
imgPath = HttpContext.Current.Request.Url.Scheme + "://" + HttpContext.Current.Request.Url.Authority + src;
else
imgPath = src;
return Image.GetInstance(imgPath);
}
}
最后的 imgPath 是正确的。但它不是静态文件,它是返回图像的动作 url,所以我需要在请求图像时传递 cookie。可能吗?