[C# Helper]
Index Books FAQ Contact About Rod
[Essential Algorithms, Second Edition]

[The Modern C# Challenge]

[WPF 3d, Three-Dimensional Graphics with WPF and C#]

[The C# Helper Top 100]

[Interview Puzzles Dissected]

[C# 24-Hour Trainer]

[Beginning Software Engineering]

[C# 5.0 Programmer's Reference]

[MCSD Certification Toolkit (Exam 70-483): Programming in C#]

Title: Format text in a RichTextBox in C#

[Format text in a RichTextBox in C#]

To format text in a RichTextBox, use the control's Select method to select the text. Then use the "Selection" properties (SelectionAlignment, SelectionBackColor, SelectionFont, etc.) to set the properties for the selected text.

This example uses the following code to format three pieces of text in the first RichTextBox.

// Format RichTextBox1. richTextBox1.Select(4, 5); richTextBox1.SelectionColor = Color.Red; richTextBox1.Select(16, 3); richTextBox1.SelectionFont = new Font(richTextBox1.Font, FontStyle.Italic); richTextBox1.Select(35, 4); richTextBox1.SelectionBackColor = Color.Yellow; richTextBox1.SelectionColor = Color.Brown; richTextBox1.Select(0, 0);

To make formatting a little easier, the following SelectRichText method selects a target string within a RichTextBox.

// Select the indicated text. private void SelectRichText(RichTextBox rch, string target) { int pos = rch.Text.IndexOf(target); if (pos < 0) { // Not found. Select nothing. rch.Select(0, 0); } else { // Found the text. Select it. rch.Select(pos, target.Length); } }

The program uses this method to format text in its second RichTextBox as shown in the following code.

SelectRichText(richTextBox2, "quick"); richTextBox2.SelectionColor = Color.Red;

Download the example to experiment with it and to see additional details.

© 2009-2022 Rocky Mountain Computer Consulting, Inc. All rights reserved.