Use RadRichTextBox in Tooltip

Updated on Sep 15, 2025

Environment

Product Version	2019.2.618
Product	RadRichTextBox for WPF

Description

To bind content to a RadRichTextBox, you need to use one of the available data providers. However, popups have their separate visual tree and name scope, so binding outside of it is not possible with ElementName/RelativeSource, due to a limitation in the framework.

Solution

To have this binding work, you can pass the data through the Content property, the value of which will serve as a DataContext to the controls that are placed in the ContentTemplate. Here is how you can achieve that for a Grid's ToolTip:

The Name is a property of the object used as a DataContext for the ToolTip.

XAML

    <Grid.ToolTip>
        <ToolTip Content="{Binding}">
            <ToolTip.ContentTemplate>
                <DataTemplate>
                    <Grid>
                        <telerik:HtmlDataProvider RichTextBox="{Binding Path=., ElementName=radRichTextBox}" Html="{Binding Path=Name}}" />
                        <telerik:RadRichTextBox Name="radRichTextBox"  Height="400" Width="1000" />
                    </Grid>
                </DataTemplate>
            </ToolTip.ContentTemplate>
        </ToolTip>
    </Grid.ToolTip>

See Also

Data Providers