Develop Reference

System.NullReferenceException: 'Object reference not set to an instance of an object.' page was null

I'm traying to test this method that checks for specific tag footer to show.
here is the function:
public void CheckForOrderOfFooterTags(PdfDocument pdfDoc, out TagTreePointer autoP, out TagTreePointer posBackup, out TagTreeInfo p)
{
// the following logic takes care of changing the order of the footer tags
// so that footers appear in the proper order in the tag tree structure
autoP =pdfDoc.GetTagStructureContext().GetAutoTaggingPointer();
posBackup =new TagTreePointer(autoP);
PagesTag.TryGetValue(PageNumber, out p);
if (p?.TagTreePointer != null)
{
// Make sure that content that will be tagged is placed in tag structure specifically where we need it.
int indexInParentKidsList = p.TagTreePointer.GetIndexInParentKidsList();
autoP.MoveToPointer(p.TagTreePointer).MoveToParent();
// setting new index only works on taggable items
if (p.Tagged)
{
autoP.SetNextNewKidIndex(indexInParentKidsList + 1);
}
}
}
and this is the test:
public void Check_For_Specific_Tag_Footer_To_Show_Successfully_Called()
{
var ir = new TestIllustrationReport().Report;
var reportProperties = new TestDocument().ReportProperties;
var sec = new FooterSection(new ProductContent(ir));
sec.Build();
Dictionary<int, TagTreeInfo> dict = new Dictionary<int, TagTreeInfo>();
reportProperties.FooterTag=dict;
FooterEventHandler footerEvent = new FooterEventHandler(sec, reportProperties);
// Must have write permissions to the path folder
var path = System.IO.Path.GetTempPath();
var fileName = System.IO.Path.ChangeExtension("Test", ".pdf");
var com = System.IO.Path.Combine(path, fileName);
// pdf
PdfWriter writer = new PdfWriter(com);
PdfDocument pdf = new PdfDocument(writer);
Event headerEvent= new PdfDocumentEvent("pdf", pdf);
PdfDocumentEvent docEvent = (PdfDocumentEvent)headerEvent;
iText.Layout.Document document = new iText.Layout.Document(pdf);
pdf.GetCatalog().SetLang(new PdfString("en-US"));
// Header and Paragraph
Paragraph header = new Paragraph(TestData.Header)
.SetTextAlignment(TextAlignment.CENTER)
.SetFontSize(20);
document.Add(header);
pdf.SetTagged();
pdf.GetCatalog().SetViewerPreferences(new PdfViewerPreferences().SetDisplayDocTitle(true));
PdfDocumentInfo info = pdf.GetDocumentInfo();
info.SetTitle("Testing tags");
Paragraph p = new Paragraph();
p.Add("The quick brown ");
PdfPage page = docEvent.GetPage();
// Rectangle and canvas
Rectangle rectangle = new Rectangle(
pdf.GetDefaultPageSize().GetX() + document.GetLeftMargin(),
pdf.GetDefaultPageSize().GetTop() - 80,
page.GetPageSize().GetWidth() - document.GetLeftMargin() - document.GetRightMargin(),
50);
Div canvas = new Div().SetFixedPosition(pdf.GetPageNumber(page), rectangle.GetLeft(), rectangle.GetBottom(), rectangle.GetWidth());
Paragraph pFooter = new Paragraph(TestData.Paragraph);
pFooter.GetAccessibilityProperties().SetRole("H");
canvas.Add(pFooter);
document.Add(canvas);
// Don't close document itself! It would close the PdfDocument!
document.GetRenderer().Close();
var pPointer = new TagTreePointer(pdf);
var pInfo = new TagTreeInfo { Tagged = true };
// Act
footerEvent.CheckForOrderOfFooterTags(pdf, out pPointer, out pPointer, out pInfo);
document.Close();
// Assert
Assert.NotNull(pdf);
}
For this test, I needed to create the pdf, set and build the footer section. I added the header to the pdf and the "footer test", I also set the document to be tagged.
I don't know why I always get the page is null if I'm adding a header and a paragraph to it.

Get text from PDF with broken encoding using iText7

I'm trying to extract text from PDF using the following method:
public static string GetRectangleText(string pdfPath, int pageId, float[] rectangleDimensions)
{
using (PdfDocument pdfDoc = new PdfDocument(new PdfReader(pdfPath)))
{
var page = pdfDoc.GetPage(pageId);
iText.Kernel.Geom.Rectangle rect = new iText.Kernel.Geom.Rectangle(rectangleDimensions[0], rectangleDimensions[1], rectangleDimensions[2], rectangleDimensions[3]);
var filter = new IEventFilter[1];
filter[0] = new TextRegionEventFilter(rect);
var filteredTextEventListener = new FilteredTextEventListener(new LocationTextExtractionStrategy(), filter);
var result = PdfTextExtractor.GetTextFromPage(page, filteredTextEventListener);
return result;
}
}
While it works fine for most documents, several PDFs which would seem to have their encoding broken, return strings like ǪȃǷǻȁǭǵǶǬdzȇǹǺǸǶǰǺǭdzȄǹǺǪǨ ,668(')25&216758&7,21 what should in fact be ВЫПУЩЕНО ДЛЯ СТРОИТЕЛЬСТВА / ISSUED FOR CONSTRUCTION
I wonder if some kind of specific LocationTextExtractionStrategy would help?

HTMLWorker itextSharp image src

I am trying to use HTMLWorker using the following:
public static string toWorks(string s)
{
string fontpath = System.Web.HttpContext.Current.Server.MapPath("~/Content/");
BaseFont bf = BaseFont.CreateFont(fontpath + "ARIALUNI.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
var f = new Font(bf, 10, Font.NORMAL);
// var p = new Paragraph { Alignment = Element.ALIGN_LEFT, Font = f };
var styles = new StyleSheet();
styles.LoadTagStyle(HtmlTags.SPAN, HtmlTags.FONTSIZE, "10");
styles.LoadTagStyle(HtmlTags.BODY, HtmlTags.ENCODING, BaseFont.IDENTITY_H);
using (var sr = new StringReader(s))
{
List<IElement> list = iTextSharp.text.html.simpleparser.HTMLWorker.ParseToList(sr, styles);
// var elements = iTextSharp.text.html.simpleparser.HTMLWorker.ParseToList(sr, styles);
foreach (var e in list)
{
list.Add(e);
}
return list.ToString();
}
return null;
}
It converts:
src="/Content/UserFiles/635380078478327671/Images/test.png
To:
C:\Content\UserFiles\635380078478327671\Images\test.png
Any suggestion.

Please compare the following two examples:
HtmlMovies1
HtmlMovies2
If you use the first example to render an HTML file with images, you probably won't succeed. The second example introduces an ImageProvider implementation.
In the getImage() method of the ImageProvider interface, you get information about the path to an image. It is up to you to interpret this path. For instance: if the path is /Content/UserFiles/635380078478327671/Images/test.png, you can create an Image object by loading the bytes from that path, possibly after applying some minor changes to the path.
If you don't create an ImageProvider class, iText will do a single guess to find the path. In your case, that guess is wrong.
You can find the C# equivalent of the examples here: http://tinyurl.com/itextsharpIIA2C09

ITextSharp: How to get an image embedded resource

I'm parsing an HTML with some images inside this.
This images are stored as embedded resource, not in the filesystem.
as I know, i need to set a custom image provider in HtmlPipelineContext, and this provider need to retrieve the image path or the itextsharp image.
The question is, somebody know which method of Abstract Image Provider i need to implement? and how?
this is my code:
var list = new List<string> { text };
byte[] renderedBuffer;
using (var outputMemoryStream = new MemoryStream())
{
using (
var pdfDocument = new Document(PageSize.A4, 30, 30, 30, 30))
{
var pdfWriter = PdfWriter.GetInstance(pdfDocument, outputMemoryStream);
pdfWriter.CloseStream = false;
pdfDocument.Open();
HtmlPipelineContext htmlContext = new HtmlPipelineContext(new CssAppliersImpl());
htmlContext.SetImageProvider(new MyImageProvider());
htmlContext.SetTagFactory(Tags.GetHtmlTagProcessorFactory());
ICSSResolver cssResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(true);
CssResolverPipeline pipeline = new CssResolverPipeline(cssResolver, new HtmlPipeline(htmlContext, new PdfWriterPipeline(pdfDocument, pdfWriter)));
XMLWorker worker = new XMLWorker(pipeline, true);
XMLParser p = new XMLParser(worker);
foreach (var htmlText in list)
{
using (var htmlViewReader = new StringReader(htmlText))
{
p.Parse(htmlViewReader);
}
}
}
renderedBuffer = new byte[outputMemoryStream.Position];
outputMemoryStream.Position = 0;
outputMemoryStream.Read(renderedBuffer, 0, renderedBuffer.Length);
}
Thanks in advance.

Using a custom Image Provider it doesn't seem to be supported. The only thing it really supports is changing root paths.
However, here's one solution to the problem:
Create a new html tag, called <resimg src="{resource name}"/>, and write a custom tag processor for it.
Here's the implementation:
/// <summary>
/// Our custom HTML Tag to add an IElement.
/// </summary>
public class ResourceImageHtmlTagProcessor : AbstractTagProcessor
{
public override IList<IElement> End(IWorkerContext ctx, Tag tag, IList<IElement> currentContent)
{
var src = tag.Attributes["src"];
var bitmap = (Bitmap)Resources.ResourceManager.GetObject(src);
if (bitmap == null)
throw new RuntimeWorkerException("No resource with the name: " + src);
var converter = new ImageConverter();
var image = Image.GetInstance((byte[])converter.ConvertTo(bitmap, typeof(byte[])));
HtmlPipelineContext htmlPipelineContext = this.GetHtmlPipelineContext(ctx);
return new List<IElement>(1)
{
this.GetCssAppliers().Apply(
new Chunk((Image)this.GetCssAppliers().Apply(image, tag, htmlPipelineContext), 0f, 0f, true),
tag,
htmlPipelineContext)
};
}
}
To configure your new processor replace the line where you specify the TagFactory with the following:
var tagProcessorFactory = Tags.GetHtmlTagProcessorFactory();
tagProcessorFactory.AddProcessor(new ResourceImageHtmlTagProcessor(), new[] { "resimg" });
htmlContext.SetTagFactory(tagProcessorFactory);

Changing Bullet Styles with Word 2007 Automation in C#

I am trying to change the style of my bullets in a word document (Word 2007).... I currently place a bullet and it comes out as a circle. I want it to be a square... here's my code for applying bullets...
public void ToggleBullets(bool bulletsOn)
{
Microsoft.Office.Interop.Word.Application wd;
Object _oMissing = Type.Missing;
Object _numberType = WdNumberType.wdNumberListNum;
if (bulletsOn)
{
wd.Selection.Range.ListFormat.ApplyBulletDefault(ref _oMissing);
}
else
{
wd.Selection.Range.ListFormat.RemoveNumbers(ref _numberType);
}
}
any ideas? Let me know if you need more details

I use the Open XML SDK 2.0 Productivity Tool for Microsoft Office:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=c6e744e5-36e9-45f5-8d8c-331df206e0d0&displaylang=en
When I want to to do these kinds of things. Just launch the Productivity tool, load up the .docx that has what you want and then let the tool generate the code for you.
I just whipped up an example and this was the code it generated:
using DocumentFormat.OpenXml.Wordprocessing;
using DocumentFormat.OpenXml;
....
public Paragraph GenerateParagraph()
{
Paragraph paragraph1 = new Paragraph(){ RsidParagraphAddition = "00EA7FFB", RsidParagraphProperties = "00EA7FFB", RsidRunAdditionDefault = "00EA7FFB" };
ParagraphProperties paragraphProperties1 = new ParagraphProperties();
ParagraphStyleId paragraphStyleId1 = new ParagraphStyleId(){ Val = "ListParagraph" };
NumberingProperties numberingProperties1 = new NumberingProperties();
NumberingLevelReference numberingLevelReference1 = new NumberingLevelReference(){ Val = 0 };
NumberingId numberingId1 = new NumberingId(){ Val = 2 };
numberingProperties1.Append(numberingLevelReference1);
numberingProperties1.Append(numberingId1);
paragraphProperties1.Append(paragraphStyleId1);
paragraphProperties1.Append(numberingProperties1);
Run run1 = new Run();
Text text1 = new Text(){ Space = SpaceProcessingModeValues.Preserve };
text1.Text = "Item ";
run1.Append(text1);
paragraph1.Append(paragraphProperties1);
paragraph1.Append(run1);
return paragraph1;
}
This is using the OpenXml headers, and not Word specifically