Blazor Server Application - Chinese font displaying problem on PDF

Question

Hi,

I am generating a PDF with iText7 as follows but getting Error: iText.IO.Exceptions.IOException: Type of font Arial Unicode MS is not recognized How can I display Chinese characters on PDF?

switch (vendorVM.Warehouse)  
        {  
            case "China Warehouse":  
                FontProgram fontProgram =  
                FontProgramFactory.CreateFont(@"Resources/NotoSansTC-Regular.otf");  
            PdfFont chinese = PdfFontFactory.CreateFont(fontProgram, PdfEncodings.IDENTITY_H);  
                Paragraph delivery = new Paragraph($"Delivery Information: AllSet Electronics.(武汉全易得科技有限公司）")  
                    .SetTextAlignment(TextAlignment.LEFT)  
                    .SetFontSize(14)  
                    .SetFont(chinese);  
                doc.Add(delivery);  

Thank you.

Answer 1

Hi @Cenk ,

Perhaps the issue relates that font file (NotoSansTC-Regular.otf), might be it was corrupted, try to re-download it.

Besides, you can also store the font file in the wwwroot folder, then access the file via the IWebHostEnvironment and the WebRootPath.

According to your code, I create a sample (install the iText7 7.2.4 version) and download the font file from here: NotoSansTC-Regular.otf.

private void PrintPDF()  
{  
    string[] data = new string[] { "Mahesh Chand", "Mike Gold", "Delivery Information: AllSet Electronics.(武汉全易得科技有限公司）" };  
    var path = Path.Combine(_env.WebRootPath, "files","output.pdf");  
    GeneratePdf(data, path);  

}  

public void GeneratePdf(string[] paragraphs, string destination)  
{  
    FileInfo file = new FileInfo(destination);  
    file.Delete();  
    var fileStream = file.Create();  
    fileStream.Close();  
    PdfDocument pdfdoc = new PdfDocument(new PdfWriter(file));   
    FontProgram fontProgram = FontProgramFactory.CreateFont(Path.Combine(_env.WebRootPath, "font", "NotoSansCJKsc-Regular.otf"));  
    PdfFont chinese = PdfFontFactory.CreateFont(fontProgram, PdfEncodings.IDENTITY_H);  
   
    using (Document document = new Document(pdfdoc))  
    {  
        foreach (var para in paragraphs)  
        {  
            Paragraph delivery = new Paragraph(para)  
                         .SetTextAlignment(TextAlignment.LEFT)  
                         .SetFontSize(14)  
                         .SetFont(chinese);  
            document.Add(delivery);  
        }  
        document.Close();  
    }  
}  

Need to add the following reference:

The result as below:

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Best regards,
Dillion