How to load a DOCX document and get missing fonts in C# and .NET

  1. Add SautinSoft.Document from Nuget.
  2. Load a DOCX document from file or stream.
  3. Get missing fonts.

After the loading process of the DOCX documents, get the names of fonts that are not installed on your system use the FontSettingsMissingFonts property.

In addition, you can substitutes the original font with the name of an alternative font available on your system using the FontSettingsAddFontSubstitutes method.

The code example below shows how to get the names of fonts that are not installed on the system and substitutes these fonts with alternative font names.

get missing fonts

Complete code

using System;
using System.Collections.Generic;
using System.Linq;
using SautinSoft.Document;

namespace Example
{
    class Program
    {

        static void Main(string[] args)
        {
            // Get your free trial key here:   
            // https://sautinsoft.com/start-for-free/

            LoadPDF();
        }

        /// <summary>
        /// Load a DOCX document, get and replace missing fonts.
        /// </summary>
        /// <remarks>
        /// Details: https://www.sautinsoft.com/products/document/help/net/developer-guide/load-pdf-document-get-missing-fonts-net-csharp-vb.php
        /// </remarks>
        static void LoadPDF()
        {
            string inpFile = @"..\..\..\fonts.docx";
            string outFile = "Result.pdf";

            // Some documents can use embedded or rare fonts which isn't installed in your system.
            // This triggers the FontSelection event, where, for example, you can output
            // a list of lost fonts to the console or add a replacement for them.
            DocumentCore dc = DocumentCore.Load(inpFile);

            List<string> MissingFonts = new List<string>();
            FontSettings.FontSelection += (s, e) =>
            {
                // Search for embedded and missing fonts.
                if (!MissingFonts.Contains(e.FontName))
                    MissingFonts.Add(e.FontName);

                // Replacing the Dubai font with Segoe UI.
                var segoe = FontSettings.Fonts.FirstOrDefault(f => f.FamilyName == "Segoe UI");
                if (e.FontName == "Dubai")
                {
                    e.SelectedFont = segoe;
                    Console.WriteLine("We\'ve changed Dubai font to Segoe UI");
                }
            };

            dc.Save(outFile);

            if (MissingFonts.Count > 0)
            {
                Console.WriteLine("Missing Fonts:");
                foreach (string fontFamily in MissingFonts)
                    Console.WriteLine(fontFamily);
            }

            // Next, knowing missing fonts, you can install these fonts in your system.

            // Also, you can specify an extra folder where component should find fonts.
            FontSettings.FontsBaseDirectory = @"d:\My Fonts";

            // Open the result for demonstration purposes.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
        }
    }
}

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Imports SautinSoft.Document

Namespace Example
    Class Program
        Shared Sub Main(ByVal args As String())
            LoadPDF()
        End Sub

        Shared Sub LoadPDF()
            Dim inpFile As String = "..\..\..\fonts.docx"
            Dim outFile As String = "Result.pdf"
            Dim dc As DocumentCore = DocumentCore.Load(inpFile)
            Dim MissingFonts As List(Of String) = New List(Of String)()
            AddHandler FontSettings.FontSelection, Sub(s, e)
                                                       ' Search for embedded and missing fonts.
                                                       If Not MissingFonts.Contains(e.FontName) Then
                                                           MissingFonts.Add(e.FontName)
                                                       End If

                                                       ' Replacing the Dubai font with Segoe UI.
                                                       Dim segoe = FontSettings.Fonts.FirstOrDefault(Function(f) f.FamilyName = "Segoe UI")
                                                       If e.FontName = "Dubai" Then
                                                           e.SelectedFont = segoe
                                                           Console.WriteLine("We've changed Dubai font to Segoe UI")
                                                       End If
                                                   End Sub

            dc.Save(outFile)

            If MissingFonts.Count > 0 Then
                Console.WriteLine("Missing Fonts:")

                For Each fontFamily As String In MissingFonts
                    Console.WriteLine(fontFamily)
                Next
            End If

            FontSettings.FontsBaseDirectory = "d:\My Fonts"
            System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {
                .UseShellExecute = True
            })
        End Sub
    End Class
End Namespace

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