When creating a new Word document, setting the appropriate fonts is crucial for establishing tone and enhancing readability. Fonts influence how your content is perceived, whether for formal reports, creative projects, or casual notes. By selecting the right typeface and size, you can ensure your document is not only visually appealing but also effective in communicating your message.

In this article, you will learn how to set fonts when creating a new Word document in C# using Spire.Doc for .NET.

Install Spire.Doc for .NET

To begin with, you need to add the DLL files included in the Spire.Doc for.NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.

PM> Install-Package Spire.Doc

Set the Font for a Paragraph in C#

Setting fonts is a fundamental task when working with Word documents in C#. Spire.Doc offers the ParagraphStyle class, which lets you specify font family, size, style, and text color. Once you've created a style, you can apply it to format a paragraph with the desired settings.

The detailed steps to set the font for a paragraph using C# are as follows:

  • Create a Document object.
  • Add a section and a paragraph to the document.
  • Append text to the paragraph.
  • Create a ParagraphStyle object.
  • Get the CharacterFormat object through the ParagraphStyle.CharacterFormat property.
  • Set the font style, name, size and text color using the properties under the CharacterFormat object.
  • Add the style to the document using the Document.Styles.Add() method.
  • Apply the defined style to the paragraph using the Paragraph.ApplyStyle() method.
  • Save the document to a Word file.

Here is an example that demonstrates how to set the font for a paragraph when creating a new Word document in C#:

  • C#
using Spire.Doc;
using Spire.Doc.Documents;
using System.Drawing;

namespace SetFontForParagraph
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a Document object
            Document doc = new Document();

            // Add a section
            Section section = doc.AddSection();

            // Set the page margins
            section.PageSetup.Margins.All = 40f;

            // Add a paragraph
            Paragraph paragraph = section.AddParagraph();

            // Append text to the paragraph
            paragraph.AppendText("Spire.Doc for .NET is a powerful library designed for developers " +
                "working with document processing in the .NET environment. It enables users to create, " +
                "read, modify, and convert various types of document formats, such as DOC, DOCX, PDF, " +
                "and more, without the need for Microsoft Office installed on the machine.");

            // Create a ParagraphStyle object
            ParagraphStyle style = new ParagraphStyle(doc);

            // Set the style name
            style.Name = "myStyle";

            // Set the font style, name, size and text color
            style.CharacterFormat.Bold = false;
            style.CharacterFormat.TextColor = Color.Black;
            style.CharacterFormat.FontName = "Times New Roman";
            style.CharacterFormat.FontSize = 14;

            // Add the style the document
            doc.Styles.Add(style);

            // Apply the style to the paragraph
            paragraph.ApplyStyle(style.Name);

            // Set the horizontal alignment
            paragraph.Format.HorizontalAlignment = HorizontalAlignment.Left;

            // Save the document to a docx file
            doc.SaveToFile("SetFont.docx", FileFormat.Docx2019);

            // Dispose resources
            doc.Dispose();
        }
    }
}

A paragraph in a document to which a defined font style has been applied

Apply Different Fonts to Text in C#

In some cases, you may need to apply various fonts to different segments of the same paragraph. Spire.Doc offers the TextRange class, which allows you to assign distinct styles to specific text ranges within a paragraph. To do this, ensure that the text requiring different styles is organized into separate text ranges.

The steps to apply multiple fonts in a paragraph using C# are as follows:

  • Create a Document object.
  • Add a section and a paragraph to the document.
  • Append text to the paragraph using the Paragraph.AppendText() method, which returns a TextRange object.
  • Append more text that needs to be styled differently to the paragraph and return different TextRange objects.
  • Create a ParagraphStyle object with the basic font information and apply it to the paragraph.
  • Change the font name, style, size and text color of the specified text range using the properties under the specific TextRange object.
  • Save the document to a Word file.

Here's an example that demonstrates how to apply different fonts to different parts of a paragraph:

  • C#
using Spire.Doc;
using Spire.Doc.Documents;
using Spire.Doc.Fields;
using System.Drawing;

namespace ApplyDifferentFontsToText
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a Document object
            Document doc = new Document();

            // Add a section
            Section section = doc.AddSection();

            // Set the page margins
            section.PageSetup.Margins.All = 40f;

            // Add a paragraph
            Paragraph paragraph = section.AddParagraph();

            // Append text to the paragraph
            TextRange textRange1 = paragraph.AppendText("Spire.Doc for .NET");
            TextRange textRange2 = paragraph.AppendText(" is a powerful library designed for developers " +
                "working with document processing in the .NET environment. It enables users to ");
            TextRange textRange3 = paragraph.AppendText("create, read, modify, and convert");
            TextRange textRange4 = paragraph.AppendText(" various types of document formats, such as ");
            TextRange textRange5 = paragraph.AppendText("DOC, DOCX, PDF");
            TextRange textRange6 = paragraph.AppendText(" and more, without the need for Microsoft Office installed on the machine.");

            // Create a ParagraphStyle object
            ParagraphStyle style = new ParagraphStyle(doc);

            // Set the style name
            style.Name = "myStyle";

            // Set the font style, name, size and text color
            style.CharacterFormat.Bold = false;
            style.CharacterFormat.TextColor = Color.Black;
            style.CharacterFormat.FontName = "Times New Roman";
            style.CharacterFormat.FontSize = 14;

            // Add the style the document
            doc.Styles.Add(style);

            // Apply the style to the paragraph
            paragraph.ApplyStyle(style.Name);

            // Change the font style of the specified text ranges
            textRange1.CharacterFormat.Bold = true;
            textRange1.CharacterFormat.TextColor = Color.Purple;
            textRange3.CharacterFormat.Bold = true;
            textRange3.CharacterFormat.TextColor = Color.Purple;
            textRange5.CharacterFormat.Bold = true;
            textRange5.CharacterFormat.TextColor = Color.Purple;

            // Set the horizontal alignment
            paragraph.Format.HorizontalAlignment = HorizontalAlignment.Left;

            // Save the document to a docx file
            doc.SaveToFile("ApplyDifferentFonts.docx", FileFormat.Docx2019);

            // Dispose resources
            doc.Dispose();
        }
    }
}

A paragraph in a Word document with different font styles applied to different parts

Use a Custom Font in a Word Document in C#

Spire.Doc supports custom fonts, allowing you to use fonts that are not installed on the system where the application is running. To use a custom font, you need to embed the font file in your application and then specify it in your code.

The steps to utilize custom fonts in a Word document are as follows:

  • Create a Document object.
  • Add a section and a paragraph to the document.
  • Append text to the paragraph.
  • Set the custom fonts for the document using the Document.SetCustomFonts() method.
  • Embed fonts in the generated file by setting the Document.EmbedFontsInFile property to true.
  • Create a ParagraphStyle object.
  • Set the font name to your custom font using the ParagraphStyle.CharacterFormat.FontName property.
  • Apply the style to the paragraph using the Paragraph.ApplyStyle() method.
  • Save the document to a Word file.

Here's an example that demonstrates how to use a custom font:

  • C#
using Spire.Doc;
using Spire.Doc.Documents;
using System.Drawing;

namespace SetFontForParagraph
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a Document object
            Document doc = new Document();

            // Add a section
            Section section = doc.AddSection();

            // Set the page margins
            section.PageSetup.Margins.All = 40f;

            // Add a paragraph
            Paragraph paragraph = section.AddParagraph();

            // Append text to the paragraph
            paragraph.AppendText("Spire.Doc for .NET is a powerful library designed for developers " +
                "working with document processing in the .NET environment. It enables users to create, " +
                "read, modify, and convert various types of document formats, such as DOC, DOCX, PDF, " +
                "and more, without the need for Microsoft Office installed on the machine.");

            // Specify the private font path
            string fontPath = "C:\\Users\\Administrator\\Desktop\\Super Morning.ttf";

            // Create an array of Stream objects to hold the font streams
            Stream[] fontStreams = new Stream[1];
            fontStreams[0] = new FileStream(fontPath, FileMode.Open, FileAccess.Read);

            // Set the custom fonts for the document
            doc.SetCustomFonts(fontStreams);

            // Embed fonts in the generated file
            doc.EmbedFontsInFile = true;

            // Create a ParagraphStyle object
            ParagraphStyle style = new ParagraphStyle(doc);

            // Set the paragraph style name
            style.Name = "myStyle";

            // Set the font name as the name of the private font
            style.CharacterFormat.FontName = "Super Morning";

            // Set the font style, size and text color
            style.CharacterFormat.Bold = false;
            style.CharacterFormat.TextColor = Color.Black;          
            style.CharacterFormat.FontSize = 14;

            // Add the style the document
            doc.Styles.Add(style);

            // Apply the defined style to the paragraph
            paragraph.ApplyStyle(style.Name);

            // Set the horizontal alignment
            paragraph.Format.HorizontalAlignment = HorizontalAlignment.Left;

            // Save the document to a docx file
            doc.SaveToFile("UseCustomFont.docx", FileFormat.Docx2019);

            // Dispose resources
            doc.Dispose();
        }
    }
}

A paragraph in a Word document with a custom font applied

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

If you want to emphasize a specific paragraph or text in your Word document, you can change its font color. This article will demonstrate how to change font color in Word in C# and VB.NET using Spire.Doc for .NET library.

Install Spire.Doc for .NET

To begin with, you need to add the DLL files included in the Spire.Doc for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.

PM> Install-Package Spire.Doc

Change Font Color of a Paragraph in C# and VB.NET

The following are the steps to change the font color of a paragraph in a Word document:

  • Create a Document instance.
  • Load the Word document using Document.LoadFromFile() method.
  • Get the desired section using Document.Sections[sectionIndex] property.
  • Get the desired paragraph that you want to change the font color of using Section.Paragraphs[paragraphIndex] property.
  • Create a ParagraphStyle instance.
  • Set the style name and font color using ParagraphStyle.Name and ParagraphStyle.CharacterFormat.TextColor properties.
  • Add the style to the document using Document.Styles.Add() method.
  • Apply the style to the paragraph using Paragraph.ApplyStyle() method.
  • Save the result document using Document.SaveToFile() method.
  • C#
  • VB.NET
using Spire.Doc;
using Spire.Doc.Documents;
using System.Drawing;

namespace ChangeFontColorForParagraph
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Document instance
            Document document = new Document();
            //Load a Word document
            document.LoadFromFile("Sample.docx");

            //Get the first section
            Section section = document.Sections[0];

            //Change text color of the first Paragraph
            Paragraph p1 = section.Paragraphs[0];
            ParagraphStyle s1 = new ParagraphStyle(document);
            s1.Name = "Color1";
            s1.CharacterFormat.TextColor = Color.RosyBrown;
            document.Styles.Add(s1);
            p1.ApplyStyle(s1.Name);

            //Change text color of the second Paragraph
            Paragraph p2 = section.Paragraphs[1];
            ParagraphStyle s2 = new ParagraphStyle(document);
            s2.Name = "Color2";
            s2.CharacterFormat.TextColor = Color.DarkBlue;
            document.Styles.Add(s2);
            p2.ApplyStyle(s2.Name);

            //Save the result document
            document.SaveToFile("ChangeParagraphTextColor.docx", FileFormat.Docx);
        }
    }
}

C#/VB.NET: Change Font Color in Word

Change Font Color of a Specific Text in C# and VB.NET

The following are the steps to change the font color of a specific text in a Word document:

  • Create a Document instance.
  • Load a Word document using Document.LoadFromFile() method.
  • Find the text that you want to change font color of using Document.FindAllString() method.
  • Loop through all occurrences of the searched text and change the font color for each occurrence using TextSelection.GetAsOneRange().CharacterFormat.TextColor Property.
  • Save the result document using Document.SaveToFile() method.
  • C#
  • VB.NET
using Spire.Doc;
using Spire.Doc.Documents;
using System.Drawing;

namespace ChangeFontColorForText
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Document instance
            Document document = new Document();
            //Load a Word document
            document.LoadFromFile("Sample.docx");

            //Find the text that you want to change font color for
            TextSelection[] text = document.FindAllString("Spire.Doc for .NET", false, true);
            //Change the font color for the searched text
            foreach (TextSelection seletion in text)
            {
                seletion.GetAsOneRange().CharacterFormat.TextColor = Color.Red;
            }

            //Save the result document
            document.SaveToFile("ChangeCertainTextColor.docx", FileFormat.Docx);
        }
    }
}

C#/VB.NET: Change Font Color in Word

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

When it comes to editing documents, making changes to the text is a common task. Microsoft Word provides a robust feature called "Find and Replace" that streamlines the text editing process. With this feature, you can effortlessly locate specific words, phrases, or characters within your document and replace them in one simple action. This eliminates the need for repetitive manual searching and time-consuming edits, saving you valuable time and effort, especially when you need to make widespread changes in lengthy documents. In this article, we will explain how to find and replace text in Word documents in C# using Spire.Doc for .NET.

Install Spire.Doc for .NET

To begin with, you need to add the DLL files included in the Spire.Doc for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.

PM> Install-Package Spire.Doc

Find Text and Replace All Its Instances with New Text

Spire.Doc for .NET provides the Document.Replace() method that enables you to find and replace specific text in a Word document. With this method, you can seamlessly replace all instances of the target text with new content. Additionally, you have the flexibility to specify whether the search should be case-sensitive and whether whole-word matching should be considered. The detailed steps are as follows.

  • Instantiate an object of the Document class.
  • Load a sample Word document using Document.LoadFromFile() method.
  • Replace all instances of specific text with new text using Document.Replace(string matchString, string newValue, bool caseSensitive, bool wholeWord) method.
  • Save the result document using Document.SaveToFile() method.
  • C#
using Spire.Doc;

namespace ReplaceAllText
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Instantiate an object of the Document class
            Document document = new Document();
            //Load a sample Word document
            document.LoadFromFile("Sample.docx");

            //Replace all instances of specific text with new text
            document.Replace("Spire.Doc", "Eiceblue", false, true);

            //Save the result document
            document.SaveToFile("ReplaceAllText.docx", FileFormat.Docx2016);
            document.Close();
        }
    }
}

C#: Find and Replace Text in Word Documents

Find Text and Replace Its First Instance with New Text

To replace the first instance of a specific text in a Word document using Spire.Doc for .NET, you can utilize the Document.ReplaceFirst property. By setting this property to true before calling the Document.Replace() method, you can change the text replacement mode to exclusively replace the first instance. The detailed steps are as follows.

  • Instantiate an object of the Document class.
  • Load a sample Word document using Document.LoadFromFile() method.
  • Change the text replacement mode to replace the first instance only by setting the Document.ReplaceFirst property to true.
  • Call the Document.Replace(string matchString, string newValue, bool caseSensitive, bool wholeWord) method to replace text.
  • Save the result document using Document.SaveToFile() method.
  • C#
using Spire.Doc;

namespace ReplaceFirstText
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Instantiate an object of the Document class
            Document document = new Document();
            //Load a sample Word document
            document.LoadFromFile("Sample.docx");

            //Change the text replacement mode to replace the first instance only
            document.ReplaceFirst = true;

            //Replace the first instance of specific text with new text
            document.Replace("Spire.Doc", "Eiceblue", false, true);

            //Save the result document
            document.SaveToFile("ReplaceFirstText.docx", FileFormat.Docx2016);
            document.Close();
        }
    }
}

Find and Replace Text with Image

Sometimes, you may need to replace text with images for visual representation or design purposes. In Spire.Doc for .NET, replacing text with image can be achieved by inserting the image at the position of the target text and then removing the text from the document. The detailed steps are as follows.

  • Instantiate an object of the Document class.
  • Load a sample Word document using Document.LoadFromFile() method.
  • Find specific text in the document using Document.FindAllString() method.
  • Loop through the matched text.
  • For each matched text, get the paragraph where it is located and get the position of the text in the paragraph.
  • Instantiate an object of the DocPicture class, and then load an image using DocPicture.LoadImage() method.
  • Insert the image into the paragraph at the position of the text and then remove the text from the paragraph.
  • Save the result document using Document.SaveToFile() method.
  • C#
using Spire.Doc;
using Spire.Doc.Documents;
using Spire.Doc.Fields;

namespace ReplaceTextWithImage
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Instantiate an object of the Document class
            Document document = new Document();
            //Load a sample Word document
            document.LoadFromFile("Sample.docx");

            //Find specific text in the document
            TextSelection[] selections = document.FindAllString("Spire.Doc", true, true);

            int index = 0;
            Paragraph ownerParagraph = null;

            //Loop through the matched text
            foreach (TextSelection selection in selections)
            {
                //Get the paragraph where the text is located
                ownerParagraph = selection.GetAsOneRange().OwnerParagraph;

                //Get the index position of the text in the paragraph
                index = ownerParagraph.ChildObjects.IndexOf(selection.GetAsOneRange());

                //Load an image
                DocPicture pic = new DocPicture(document);
                pic.LoadImage("img.png");

                //Insert the image into the paragraph at the index position of the text
                ownerParagraph.ChildObjects.Insert(index, pic);

                //Remove the text from the paragraph
                ownerParagraph.ChildObjects.Remove(selection.GetAsOneRange());
            }

            //Save the result document
            document.SaveToFile("ReplaceTextWithImage.docx", FileFormat.Docx2016);
            document.Close();
        }
    }
}

C#: Find and Replace Text in Word Documents

Find and Replace Text using Regular Expression

Regular expressions offer a robust toolset for performing complex search and replace operations within documents. The Document.Replace() method can leverage regular expressions to search for specific text, allowing you to perform advanced search and replace operations based on specific criteria. The detailed steps are as follows.

  • Instantiate an object of the Document class.
  • Load a sample Word document using Document.LoadFromFile() method.
  • Instantiate an object of the Regex class to match text based on specific criteria.
  • Replace the matched text with new text using Document.Replace(Regex pattern, string replace) method.
  • Save the resulting document using Document.SaveToFile() method.
  • C#
using Spire.Doc;
using System.Text.RegularExpressions;

namespace ReplaceTextWithRegex
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Instantiate an object of the Document class
            Document document = new Document();
            //Load a sample Word document
            document.LoadFromFile("Sample.docx");

            //Create a regex to match the text that starts with #
            Regex regex = new Regex(@"\#\w+\b");

            //Replace the matched text with new text
            document.Replace(regex, "Spire.Doc");

            //Save the result document
            document.SaveToFile("ReplaceTextWithRegex.docx", FileFormat.Docx2016);
            document.Close();
        }
    }
}

Find and Replace Text with Content from Another Word Document

In addition to replacing text with new text or image, Spire.Doc for .NET also enables you to replace text with content from another Word document. This can be beneficial when you are working on a predefined Word template and need to incorporate contents from other Word documents into it. The detailed steps are as follows.

  • Instantiate an object of the Document class.
  • Load a sample Word document using Document.LoadFromFile() method.
  • Load another Word document into an IDocument object.
  • Replace specific text in the sample document with content from another document using Document.Replace(string matchString, IDocument matchDoc, bool caseSensitive, bool wholeWord) method.
  • Save the result document using Document.SaveToFile() method.
  • C#
using Spire.Doc;
using Spire.Doc.Interface;

namespace ReplaceTextWithDocument
{
    internal class Program
    {
        static void Main(string[] args)
        {
            //Instantiate an object of the Document class
            Document document = new Document();
            //Load a sample Word document
            document.LoadFromFile("Template.docx");

            //Load another Word document
            IDocument document1 = new Document("Report.docx");

            //Replace specific text in the sample document with content from another document
            document.Replace("Annual Sales", document1, false, true);

            //Save the result document
            document.SaveToFile("ReplaceTextWithDocument.docx", FileFormat.Docx2016);
            document.Close();
        }
    }
}

Apply for a Temporary License

If you'd like to remove the evaluation message from the generated documents, or to get rid of the function limitations, please request a 30-day trial license for yourself.

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