Color specific words in RichtextBox

by

Add an event to your rich box text changed,

  private void Rchtxt_TextChanged(object sender, EventArgs e)
        {
            this.CheckKeyword("while", Color.Purple, 0);
            this.CheckKeyword("if", Color.Green, 0);
        }



private void CheckKeyword(string word, Color color, int startIndex)
    {
        if (this.Rchtxt.Text.Contains(word))
        {
            int index = -1;
            int selectStart = this.Rchtxt.SelectionStart;

            while ((index = this.Rchtxt.Text.IndexOf(word, (index + 1))) != -1)
            {
                this.Rchtxt.Select((index + startIndex), word.Length);
                this.Rchtxt.SelectionColor = color;
                this.Rchtxt.Select(selectStart, 0);
                this.Rchtxt.SelectionColor = Color.Black;
            }
        }
    }

More Related Contents:

  1. Implementing INotifyPropertyChanged – does a better way exist?
  2. Find control by name from Windows Forms controls
  3. How to double buffer .NET controls on a form?
  4. How can I disable a tab inside a TabControl?
  5. What is the “right” way to bring a Windows Forms Application to the foreground?
  6. Accessing UI Control from BackgroundWorker Thread
  7. How to create an Explorer-like folder browser control?
  8. Winforms: Application.Exit vs Environment.Exit vs Form.Close
  9. Creating Custom Picturebox with Draggable and Resizable Selection Window
  10. How to change the color of winform DataGridview header?
  11. Run multiple UI Threads
  12. Passing data between WinForms forms [duplicate]
  13. Topmost form, clicking “through” possible?
  14. modifying the registry key value
  15. Panel for drawing graphics and scrolling
  16. Is there a quick way to get the control that’s under the mouse?
  17. How do I ensure a form displays on the “additional” monitor in a dual monitor scenario? [duplicate]
  18. How to disable creation of empty log file on app start?
  19. How can I set different Tooltip text for each item in a listbox?
  20. Is it possible to bind a List to a ListView in WinForms?
  21. Clipboard Copying objects to and from
  22. C# trying to capture the KeyDown event on a form
  23. Removing dynamic controls from panel
  24. How do I set the size of the visible area of a form, minus heading and borders?
  25. Properly disposing of, and removing references to UserControls, to avoid memory leak
  26. Change ComboBox Border Color in Windows Forms
  27. How do I make custom controls in C#? [closed]
  28. Passing a variable between Windows Forms forms
  29. Draw on a form by a separate thread
  30. Exposing events of underlying control

Leave a Comment