Justify Text in a Textbox Field

In this article, we’ll show you how to justify text in a textbox field in a PDF file.

Implementation details

FormEditor class in Aspose.Pdf.Facades namespace offers the capability to decorate a PDF form field. Now, if your requirement is to justify the text in a textbox field, you can easily achieve that using AlignJustified value of FormFieldFacade enumeration and calling the FormEditor.DecorateField method. In the below example, first we will fill a Textbox Field using the FillField method of Form class. After that we will use FormEditor class to justify the Text in the Textbox Field. The following code snippet shows you how to justify text in a Textbox Field.

// For complete examples and data files, visit https://github.com/aspose-pdf/Aspose.PDF-for-.NET
private static void JustifyTextInTextboxField()
{
    // The path to the documents directory 
    var dataDir = RunExamples.GetDataDir_AsposePdfFacades_TechnicalArticles();
    // Open PDF document
    using (var source = File.Open(dataDir + "JustifyText.pdf", FileMode.Open))
    {
        using (var ms = new MemoryStream())
        {
            // Create Form Object
            var form = new Aspose.Pdf.Facades.Form();
            // Bind PDF document
            form.BindPdf(source);
            // Fill Text Field
            form.FillField("Text1", "Thank you for using Aspose");
            // Save PDF document in Memory Stream
            form.Save(ms);
            ms.Seek(0, SeekOrigin.Begin);

            using (var dest = new FileStream(dataDir + "JustifyText_out.pdf", FileMode.Create))
            {
                // Create formEditor Object
                using (var formEditor = new Aspose.Pdf.Facades.FormEditor())
                {
                    // Open PDF from memory stream
                    formEditor.BindPdf(ms);
                    // Set Text Alignment as Justified
                    formEditor.Facade.Alignment = Aspose.Pdf.Facades.FormFieldFacade.AlignJustified;
                    // Decorate form field
                    formEditor.DecorateField();
                    // Save PDF document
                    formEditor.Save(dest);
                }
            }
        }
    }
}

Please note that justified alignment is not supported by PDF that’s why text will be aligned left when you input the text in the Textbox Field. But when field is not active text is justified.