The issue may be reproduced by opening the attached PDF in Adobe Reader. Although the viewer initially shows the characters correctly, when you start typing in the TextBox, the umlaut/diacritics characters get corrupted. In other PDF viewers, the umlaut characters are handled correctly, so the issue seems to related to concrete Adobe Reader encoding handling implementation. The diacritic characters are handled incorrectly in other viewers as well (e.g. Chrome).
When a Pdf document contains TextBoxFields some of which are hidden and you merge it with another document, the hidden state is reset and the field appears in the merged document:
Before:
After:
System.ArgumentException: 'An item with the same key has already been added. Key: Telerik.Windows.Documents.Fixed.Model.InteractiveForms.RadioButtonField'
It is reproducible when you have at least 2 pages with RadioButtonFields. The import operation goes smoothly. However, merging or removing a page after import leads to the described error.
When exporting a DOCX file to PDF format, the following error message occurs:
When writing a RadFixedPage containing widgets using the PdfPageStreamWriter.WriteContent() method an exception is thrown.
The exception: System.ArgumentNullException: 'Value cannot be null. Parameter name: context'
using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Streaming;
using Telerik.Windows.Documents.Fixed.Model.Editing;
using Telerik.Windows.Documents.Fixed.Model.InteractiveForms;
using Telerik.Windows.Documents.Fixed.Model;
using Telerik.Documents.Primitives;
using System.Diagnostics;
using System.Reflection.Metadata;
using Telerik.Windows.Documents.Fixed.FormatProviders.Pdf;
namespace _1681158PdfInputFields
{
internal class Program
{
static void Main(string[] args)
{
ExportExamplePdfForm();
}
public static void ExportExamplePdfForm()
{
RadFixedDocument fixedDoc = new RadFixedDocument();
RadFixedPage fixedPage = fixedDoc.Pages.AddPage();
FixedContentEditor editor = new FixedContentEditor(fixedPage);
editor.Position.Translate(100, 100);
TextBoxField textBox = new TextBoxField("textBox");
fixedDoc.AcroForm.FormFields.Add(textBox);
textBox.Value = "Sample text...";
Size widgetDimensions = new Size(200, 30);
DrawNextWidgetWithDescription(editor, "TextBox", (e) => e.DrawWidget(textBox, widgetDimensions));
string fileName = "output.pdf";
File.Delete(fileName);
// File.WriteAllBytes(fileName, new PdfFormatProvider().Export(fixedDoc, TimeSpan.FromSeconds(15)));
string ResultFileName = "result.pdf";
File.Delete(ResultFileName);
using (PdfStreamWriter writer = new PdfStreamWriter(File.OpenWrite(ResultFileName)))
{
foreach (RadFixedPage page in fixedDoc.Pages)
{
writer.WritePage(page);
}
}
ProcessStartInfo psi = new ProcessStartInfo()
{
FileName = ResultFileName,
UseShellExecute = true
};
Process.Start(psi);
Console.WriteLine("Document created.");
}
private static void DrawNextWidgetWithDescription(FixedContentEditor editor, string description, Action<FixedContentEditor> drawWidgetWithEditor)
{
double padding = 20;
drawWidgetWithEditor(editor);
Size annotationSize = editor.Root.Annotations[editor.Root.Annotations.Count - 1].Rect.Size;
double x = editor.Position.Matrix.OffsetX;
double y = editor.Position.Matrix.OffsetY;
Block block = new Block();
block.TextProperties.FontSize = 20;
block.VerticalAlignment = Telerik.Windows.Documents.Fixed.Model.Editing.Flow.VerticalAlignment.Center;
block.InsertText(description);
editor.Position.Translate(x + annotationSize.Width + padding, y);
editor.DrawBlock(block, new Size(editor.Root.Size.Width, annotationSize.Height));
editor.Position.Translate(x, y + annotationSize.Height + padding);
}
}
}