How to draw the complex scripts in a PDF document?
Syncfusion Essential® PDF is the .NET PDF library used to create, read, and edit PDF documents. Using this library, you can draw the complex script language text such as Thai, Hindi, Tamil, Kannada and more in a PDF document by enabling the ComplexScript property of the PdfStringFormat instance.
Steps to preserve complex script language in PDF document programmatically.
- Create a new C# console application project.

- Install the Syncfusion.Pdf.WinForms NuGet package as reference to your .NET Framework applications from NuGet.org.

- Include the following namespaces in the Program.cs file.
C#
using Syncfusion.Pdf; using Syncfusion.Pdf.Graphics;
VB.NET
Imports Syncfusion.Pdf Imports Syncfusion.Pdf.Graphics
- Enable the ComplexScript property in the PdfStringFormat instance to draw the complex script layout texts.
//Create a new instance for the PdfStringFormrat PdfStringFormat format = new PdfStringFormat(); //Set the format to complex script layout type format.ComplexScript = true;
- Use the following C# or VB.NET code snippets to draw the complex scripts in a PDF document.
C#
//Create a new PDF document
PdfDocument doc = new PdfDocument();
//Add a page to the document
PdfPage page = doc.Pages.Add();
//Initialize the PDF page graphics
PdfGraphics graphics = page.Graphics;
//Set the font with Unicode option
Font font = new Font("Nirmala UI", 14);
PdfFont pdfFont = new PdfTrueTypeFont(font, true);
//Create a new instance for the PdfStringFormrat
PdfStringFormat format = new PdfStringFormat();
//Set the format to complex script layout type
format.ComplexScript = true;
//Draw the text to page graphics
graphics.DrawString("ওহে বিশ্ব", pdfFont, PdfBrushes.Black, new RectangleF(0, 0, page.GetClientSize().Width, page.GetClientSize().Height), format);
//Save the document
doc.Save("Sample.pdf");
//Close the document
doc.Close(true);
VB.NET
'Create a new PDF document
Dim doc As New PdfDocument()
'Add a page to the document
Dim page As PdfPage = doc.Pages.Add()
'Initialize the PDF page graphics
Dim graphics As PdfGraphics = page.Graphics
'Set the font with Unicode option
Dim font As New Font("Nirmala UI", 14)
Dim pdfFont As PdfFont = New PdfTrueTypeFont(font, True)
'Create a new instance for PdfStringFormrat
Dim format As New PdfStringFormat()
'Set the format as complex script layout type
format.ComplexScript = True
'Draw the text to page graphics
graphics.DrawString("ওহে বিশ্ব", pdfFont, PdfBrushes.Black, New RectangleF(0, 0, page.GetClientSize().Width, page.GetClientSize().Height), format)
'Save the document
doc.Save("Sample.pdf")
'Close the document
doc.Close(True)
A complete working sample can be downloaded from ComplexScriptSample.zip
By executing the program, you will get the PDF document as follows. 
Note:
Starting with v16.2.0.x, if you reference Syncfusion® assemblies from the trial setup or the NuGet feed, include a license key in your projects. Refer to the link to learn about generating and registering the Syncfusion® license key in your application to use the components without a trial message.
Conclusion:
I hope you enjoyed learning about how to draw the complex scripts in a PDF document.
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