Aspose PDF Document - FreeTextAnnotation does not show text

Aspose.PDF Product Family
1

Hello,

I’m trying to add a simple text box to a PDF document, using this code:

_pdfDocument = new Aspose.Pdf.Document(sourceFilePath);
Aspose.Pdf.Page page = _pdfDocument.Pages[1];
Aspose.Pdf.Rectangle rect = new Aspose.Pdf.Rectangle(10,10,100,50);
DefaultAppearance appearance = new DefaultAppearance();
FreeTextAnnotation annotation = new FreeTextAnnotation(page, rect, appearance);
annotation.Contents = "This is the text";
page.Annotations.Add(annotation);
_pdfDocument.Save(destFilePath);

But the result PDF shows the TextBox frame but without the text. When double-clicking inside I can see the text, then if I add any character or make any change to that text, it will show correctly.

What am I missing?

2

@nir-1

Could you please attach your input, problematic and expected output PDF files here for testing? We will investigate the issue and provide you more information on it.

3

Here is the source pdf: source.pdf (30.8 KB)

And the output: output.pdf (30.6 KB)

4

@nir-1

Please use the following code example to add textbox in PDF. If you want to work with text annotation, please read the following article.
Using Text Annotation for PDF

// Create new document object
Document pdfDocument = new Document();
// Get particular page
Page pdfPage = (Page)pdfDocument.Pages.Add();
// Create text fragment
TextFragment textFragment = new TextFragment("main text");
textFragment.Position = new Position(100, 600);
// Set text properties
textFragment.TextState.FontSize = 12;
textFragment.TextState.Font = FontRepository.FindFont("TimesNewRoman");
textFragment.TextState.BackgroundColor = Aspose.Pdf.Color.LightGray;
textFragment.TextState.ForegroundColor = Aspose.Pdf.Color.Red;
// Set StrokingColor property for drawing border (stroking) around text rectangle
textFragment.TextState.StrokingColor = Aspose.Pdf.Color.Black;
// Set DrawTextRectangleBorder property value to true
textFragment.TextState.DrawTextRectangleBorder = true;
TextBuilder tb = new TextBuilder(pdfPage);
tb.AppendText(textFragment);
// Save the document
pdfDocument.Save(MyDir + "22.2.pdf");
5

I have found the problem.

After several tries using the code here:
https://docs.aspose.com/pdf/net/text-annotation/#set-formatting-of-freetextannotation

I have figure out that the DefaultAppearance must have a font size and color specified. Otherwise the text is set to font size zero…

This is not happening when using the CreateFreeText method from ContentEditor object.

6

After finding the ‘font size’ problem, I’m still struggling with it.

I need to display the FreeTextAnnotation text in the center (horizontally & vertically) of the rect.
I also need to control the border color.

Is it possible?

7

@nir-1

You can use TextStyle.HorizontalAlignment property for FreeTextAnnotation as HorizontalAlignment.Center for horizontal alignment. However, there is no property for vertical alignment. Please check the following code snippet.

freetext.TextStyle.HorizontalAlignment = HorizontalAlignment.Center;

Could you please attach your expected output PDF here for our reference? We will then provide you more information on it.

8

@nir-1

Further to my previous post, you can use following code example achieve your requirement. Hope this helps you.

Document doc = new Document();

    Page page = doc.Pages.Add();
    page.PageInfo.Margin = new MarginInfo(0, 0, 0, 0);


    var canvas = new Graph((float)page.PageInfo.Width, (float)page.PageInfo.Height);//tf.Rectangle.Width, pg.PageInfo.Height
                                                                                            //canvas.Margin = new MarginInfo() { Bottom = 0, Left = 0, Right = 0, Top = 0 };
                                                                                            //canvas.Left = 0;
                                                                                            //canvas.Top = 0;
                                                                                            //canvas.Border = new BorderInfo(BorderSide.All, 1f, Color.Black);
    page.Paragraphs.Add(canvas);

    Aspose.Pdf.Drawing.Rectangle rect = new Aspose.Pdf.Drawing.Rectangle(100, 354, 200, 200); //new Aspose.Pdf.Drawing.Rectangle(0, 700, 100, 750);
    var c = ColorTranslator.FromHtml("#FFFF00");
    //rect.GraphInfo.Color = Aspose.Pdf.Color.FromRgb(c);
    //rect.GraphInfo.FillColor = alphaColor;
    //canvas.Shapes.Add(rect);
    rect.Text = new TextFragment("test address");
    rect.GraphInfo.Color = Aspose.Pdf.Color.FromRgb(c);
    canvas.Shapes.Add(rect);
    doc.Save(dataDir + "22.2.pdf");
9

This is an interesting solution/workaround, however, I can not set the text size or font.
Or can I?

10

@nir-1

You can change the font size of text as shown below using TextState class.

Document doc = new Document();
Page page = doc.Pages.Add();
page.PageInfo.Margin = new MarginInfo(0, 0, 0, 0);

var canvas = new Graph((float)page.PageInfo.Width, (float)page.PageInfo.Height);
page.Paragraphs.Add(canvas);

Aspose.Pdf.Drawing.Rectangle rect = new Aspose.Pdf.Drawing.Rectangle(100, 354, 200, 200); 
var c = ColorTranslator.FromHtml("#FFFF00");
var textFragment = new TextFragment("test address")
{
    TextState =
            {
                FontSize = 24,
                Font = FontRepository.FindFont("Arial"),
                BackgroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.White),
                ForegroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Black)
            }
};

rect.Text = textFragment;
rect.GraphInfo.Color = Aspose.Pdf.Color.FromRgb(c);

canvas.Shapes.Add(rect);
doc.Save(dataDir + "22.2.pdf");