Hi Issam,
Thanks for choosing Syncfusion products,
At this moment our RichTextBoxAdv control does not have support for two binding. But two way binding can achieve using command for setting and property for retrieving the style. For your reference we have prepared a sample to illustrate the same. Please find the sample from below link.
Code Snippet:
<ToggleButton syncfusion:ToolBarAdv.Label="Bold" Command="syncfusion:RichTextBoxAdv.ToggleBold" CommandTarget="{Binding ElementName=rte}" IsChecked="{Binding Path=CurrentInlineStyle.FontWeight, Converter={StaticResource FontWeightToChecked}, Mode=TwoWay, ElementName=rte}" Height="22" Width="22"/>
Sample link:
Sample
Please let me know if you have any other questions
Regards,
Narendran
