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Track Changes

Track Changes is a way for RadRichTextBox to keep track of the changes you make to a document. You can then choose to accept or reject those changes.

Activating Track Changes

You can activate change tracking tgrough the IsTrackChangesEnabled property of RadRichTextBox:


this.radRichTextBox.IsTrackChangesEnabled = true;

When change tracking is enabled all changes made in the document will be tracked. This includes:

  • adding and removing text;

  • formatting changes of the document elements;

  • adding and removing images, hyperlinks, tables, etc.

Rad Rich Text Box Features Track Changes 0

Customizing Changes Visualization

As you can see tracked changes are visualized inside the rich text box with different colors. You can modify these colors by using the TrackChangesOptions property of RadRichTextBox. Here is for example how to customize the look of the tracked changes so that insertions are shown in green, deletions are shown in underlined orange and the vertical line indicating changes is red:


this.radRichTextBox.TrackChangesOptions.Insert.Decoration = RevisionDecoration.ColorOnly;
this.radRichTextBox.TrackChangesOptions.Insert.ColorOptions = new RevisionColor(Colors.Green);

this.radRichTextBox.TrackChangesOptions.Delete.Decoration = RevisionDecoration.Underline;
this.radRichTextBox.TrackChangesOptions.Delete.ColorOptions = new RevisionColor(Colors.Orange);

this.radRichTextBox.TrackChangesOptions.ChangedLinesDecorationColorOptions.ColorOptions = new RevisionColor(Colors.Red);

The result is:

Rad Rich Text Box Features Track Changes 1

Changing Current User

All changes made while track changes are enabled are made on behalf of the current user. The current user can be changed by setting the CurrentUser property of the RadRichTextBox:


this.radRichTextBox.CurrentUser = new UserInfo("Group", "Boby", "Boby", "bobby@telerik.com");

Here is the result:

Rad Rich Text Box Features Track Changes 2

By default, insert and delete changes by different authors will be displayed in different colors. This can be changed through the TrackChangesOptions as described in the previous section.

RadDocument provides a set of methods for navigating and getting revisions – a special class containing information for a single change in the document. Revisions can be one of these 3 types:

  • Structure – Inserted or deleted text.

  • Formatting – A change in the properties of a document element.

  • Table – added or removed table rows.

All revision have a RevisionInfo object associated to them, which contains information about the user who made the change and the date and time it was made. Revisions in the document can be accessed and selected with the following methods of the RadDocument:


public Revision GoToPreviousRevision()
public Revision GoToNextRevision()
public Revision GetCurrentRevision()
public Revision GetNextRevision()
public Revision GetPreviousRevision()
public IEnumerable<Revision> GetAllRevisions()