Change the Font on just the specific Unicode characters while saving to PDF

Example

The following screenshot compares the two output PDFs generated by the sample code below.

One is generated without setting PdfSaveOptions.IsFontSubstitutionCharGranularity property and the other was generated after setting the PdfSaveOptions.IsFontSubstitutionCharGranularity property to true.

As you can see in the first Pdf, the font of entire sentence has changed from Times New Roman to Arial Unicode MS because of Non-Breaking Hyphen. While in the second Pdf, only the font of Non-Breaking Hyphen has changed.

First Pdf File
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Second Pdf File
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Sample Code

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// Create workbook object
Workbook workbook = new Workbook();
// Access the first worksheet
Worksheet worksheet = workbook.Worksheets[0];
// Access cells
Cell cell1 = worksheet.Cells["A1"];
Cell cell2 = worksheet.Cells["B1"];
// Set the styles of both cells to Times New Roman
Style style = cell1.GetStyle();
style.Font.Name = "Times New Roman";
cell1.SetStyle(style);
cell2.SetStyle(style);
// Put the values inside the cell
cell1.PutValue("Hello without Non-Breaking Hyphen");
cell2.PutValue("Hello" + Convert.ToChar(8209) + " with Non-Breaking Hyphen");
// Autofit the columns
worksheet.AutoFitColumns();
// Save to Pdf without setting PdfSaveOptions.IsFontSubstitutionCharGranularity
workbook.Save(dataDir + "SampleOutput_out.pdf");
// Save to Pdf after setting PdfSaveOptions.IsFontSubstitutionCharGranularity to true
PdfSaveOptions opts = new PdfSaveOptions();
opts.IsFontSubstitutionCharGranularity = true;
workbook.Save(dataDir + "SampleOutput2_out.pdf", opts);